From 243a2e63f5f47763b802e9dee8dbf1611a1c1322 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:09 +0000 Subject: bridge: Add vlan filtering infrastructure Adds an optional infrustructure component to bridge that would allow native vlan filtering in the bridge. Each bridge port (as well as the bridge device) now get a VLAN bitmap. Each bit in the bitmap is associated with a vlan id. This way if the bit corresponding to the vid is set in the bitmap that the packet with vid is allowed to enter and exit the port. Write access the bitmap is protected by RTNL and read access protected by RCU. Vlan functionality is disabled by default. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/Kconfig | 14 ++++ net/bridge/Makefile | 2 + net/bridge/br_if.c | 1 + net/bridge/br_private.h | 59 ++++++++++++++ net/bridge/br_sysfs_br.c | 21 +++++ net/bridge/br_vlan.c | 199 +++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 296 insertions(+) create mode 100644 net/bridge/br_vlan.c diff --git a/net/bridge/Kconfig b/net/bridge/Kconfig index 6dee7bf648a9..aa0d3b2f1bb7 100644 --- a/net/bridge/Kconfig +++ b/net/bridge/Kconfig @@ -46,3 +46,17 @@ config BRIDGE_IGMP_SNOOPING Say N to exclude this support and reduce the binary size. If unsure, say Y. + +config BRIDGE_VLAN_FILTERING + bool "VLAN filtering" + depends on BRIDGE + depends on VLAN_8021Q + default n + ---help--- + If you say Y here, then the Ethernet bridge will be able selectively + receive and forward traffic based on VLAN information in the packet + any VLAN information configured on the bridge port or bridge device. + + Say N to exclude this support and reduce the binary size. + + If unsure, say Y. diff --git a/net/bridge/Makefile b/net/bridge/Makefile index e859098f5ee9..e85498b2f166 100644 --- a/net/bridge/Makefile +++ b/net/bridge/Makefile @@ -14,4 +14,6 @@ bridge-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o +bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o + obj-$(CONFIG_BRIDGE_NF_EBTABLES) += netfilter/ diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index 2148d474a04f..af9d65ab4001 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -139,6 +139,7 @@ static void del_nbp(struct net_bridge_port *p) br_ifinfo_notify(RTM_DELLINK, p); + nbp_vlan_flush(p); br_fdb_delete_by_port(br, p, 1); list_del_rcu(&p->list); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 06e85d9c05aa..1f3b309beea8 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -18,6 +18,7 @@ #include #include #include +#include #define BR_HASH_BITS 8 #define BR_HASH_SIZE (1 << BR_HASH_BITS) @@ -26,6 +27,7 @@ #define BR_PORT_BITS 10 #define BR_MAX_PORTS (1<priv_flags & IFF_BRIDGE_PORT) @@ -257,6 +272,10 @@ struct net_bridge struct timer_list topology_change_timer; struct timer_list gc_timer; struct kobject *ifobj; +#ifdef CONFIG_BRIDGE_VLAN_FILTERING + u8 vlan_enabled; + struct net_port_vlans __rcu *vlan_info; +#endif }; struct br_input_skb_cb { @@ -531,6 +550,46 @@ static inline void br_mdb_uninit(void) } #endif +/* br_vlan.c */ +#ifdef CONFIG_BRIDGE_VLAN_FILTERING +extern int br_vlan_add(struct net_bridge *br, u16 vid); +extern int br_vlan_delete(struct net_bridge *br, u16 vid); +extern void br_vlan_flush(struct net_bridge *br); +extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); +extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid); +extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); +extern void nbp_vlan_flush(struct net_bridge_port *port); +#else +static inline int br_vlan_add(struct net_bridge *br, u16 vid) +{ + return -EOPNOTSUPP; +} + +static inline int br_vlan_delete(struct net_bridge *br, u16 vid) +{ + return -EOPNOTSUPP; +} + +static inline void br_vlan_flush(struct net_bridge *br) +{ +} + +static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid) +{ + return -EOPNOTSUPP; +} + +static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) +{ + return -EOPNOTSUPP; +} + +static inline void nbp_vlan_flush(struct net_bridge_port *port) +{ +} + +#endif + /* br_netfilter.c */ #ifdef CONFIG_BRIDGE_NETFILTER extern int br_netfilter_init(void); diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c index 5913a3a0047b..8baa9c08e1a4 100644 --- a/net/bridge/br_sysfs_br.c +++ b/net/bridge/br_sysfs_br.c @@ -691,6 +691,24 @@ static ssize_t store_nf_call_arptables( static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR, show_nf_call_arptables, store_nf_call_arptables); #endif +#ifdef CONFIG_BRIDGE_VLAN_FILTERING +static ssize_t show_vlan_filtering(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct net_bridge *br = to_bridge(d); + return sprintf(buf, "%d\n", br->vlan_enabled); +} + +static ssize_t store_vlan_filtering(struct device *d, + struct device_attribute *attr, + const char *buf, size_t len) +{ + return store_bridge_parm(d, buf, len, br_vlan_filter_toggle); +} +static DEVICE_ATTR(vlan_filtering, S_IRUGO | S_IWUSR, + show_vlan_filtering, store_vlan_filtering); +#endif static struct attribute *bridge_attrs[] = { &dev_attr_forward_delay.attr, @@ -731,6 +749,9 @@ static struct attribute *bridge_attrs[] = { &dev_attr_nf_call_iptables.attr, &dev_attr_nf_call_ip6tables.attr, &dev_attr_nf_call_arptables.attr, +#endif +#ifdef CONFIG_BRIDGE_VLAN_FILTERING + &dev_attr_vlan_filtering.attr, #endif NULL }; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c new file mode 100644 index 000000000000..209464ef5242 --- /dev/null +++ b/net/bridge/br_vlan.c @@ -0,0 +1,199 @@ +#include +#include +#include +#include + +#include "br_private.h" + +static int __vlan_add(struct net_port_vlans *v, u16 vid) +{ + int err; + + if (test_bit(vid, v->vlan_bitmap)) + return -EEXIST; + + if (v->port_idx && vid) { + struct net_device *dev = v->parent.port->dev; + + /* Add VLAN to the device filter if it is supported. + * Stricly speaking, this is not necessary now, since devices + * are made promiscuous by the bridge, but if that ever changes + * this code will allow tagged traffic to enter the bridge. + */ + if (dev->features & NETIF_F_HW_VLAN_FILTER) { + err = dev->netdev_ops->ndo_vlan_rx_add_vid(dev, vid); + if (err) + return err; + } + } + + set_bit(vid, v->vlan_bitmap); + return 0; +} + +static int __vlan_del(struct net_port_vlans *v, u16 vid) +{ + if (!test_bit(vid, v->vlan_bitmap)) + return -EINVAL; + + if (v->port_idx && vid) { + struct net_device *dev = v->parent.port->dev; + + if (dev->features & NETIF_F_HW_VLAN_FILTER) + dev->netdev_ops->ndo_vlan_rx_kill_vid(dev, vid); + } + + clear_bit(vid, v->vlan_bitmap); + if (bitmap_empty(v->vlan_bitmap, BR_VLAN_BITMAP_LEN)) { + if (v->port_idx) + rcu_assign_pointer(v->parent.port->vlan_info, NULL); + else + rcu_assign_pointer(v->parent.br->vlan_info, NULL); + kfree_rcu(v, rcu); + } + return 0; +} + +static void __vlan_flush(struct net_port_vlans *v) +{ + bitmap_zero(v->vlan_bitmap, BR_VLAN_BITMAP_LEN); + if (v->port_idx) + rcu_assign_pointer(v->parent.port->vlan_info, NULL); + else + rcu_assign_pointer(v->parent.br->vlan_info, NULL); + kfree_rcu(v, rcu); +} + +/* Must be protected by RTNL */ +int br_vlan_add(struct net_bridge *br, u16 vid) +{ + struct net_port_vlans *pv = NULL; + int err; + + ASSERT_RTNL(); + + pv = rtnl_dereference(br->vlan_info); + if (pv) + return __vlan_add(pv, vid); + + /* Create port vlan infomration + */ + pv = kzalloc(sizeof(*pv), GFP_KERNEL); + if (!pv) + return -ENOMEM; + + pv->parent.br = br; + err = __vlan_add(pv, vid); + if (err) + goto out; + + rcu_assign_pointer(br->vlan_info, pv); + return 0; +out: + kfree(pv); + return err; +} + +/* Must be protected by RTNL */ +int br_vlan_delete(struct net_bridge *br, u16 vid) +{ + struct net_port_vlans *pv; + + ASSERT_RTNL(); + + pv = rtnl_dereference(br->vlan_info); + if (!pv) + return -EINVAL; + + __vlan_del(pv, vid); + return 0; +} + +void br_vlan_flush(struct net_bridge *br) +{ + struct net_port_vlans *pv; + + ASSERT_RTNL(); + + pv = rtnl_dereference(br->vlan_info); + if (!pv) + return; + + __vlan_flush(pv); +} + +int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) +{ + if (!rtnl_trylock()) + return restart_syscall(); + + if (br->vlan_enabled == val) + goto unlock; + + br->vlan_enabled = val; + +unlock: + rtnl_unlock(); + return 0; +} + +/* Must be protected by RTNL */ +int nbp_vlan_add(struct net_bridge_port *port, u16 vid) +{ + struct net_port_vlans *pv = NULL; + int err; + + ASSERT_RTNL(); + + pv = rtnl_dereference(port->vlan_info); + if (pv) + return __vlan_add(pv, vid); + + /* Create port vlan infomration + */ + pv = kzalloc(sizeof(*pv), GFP_KERNEL); + if (!pv) { + err = -ENOMEM; + goto clean_up; + } + + pv->port_idx = port->port_no; + pv->parent.port = port; + err = __vlan_add(pv, vid); + if (err) + goto clean_up; + + rcu_assign_pointer(port->vlan_info, pv); + return 0; + +clean_up: + kfree(pv); + return err; +} + +/* Must be protected by RTNL */ +int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) +{ + struct net_port_vlans *pv; + + ASSERT_RTNL(); + + pv = rtnl_dereference(port->vlan_info); + if (!pv) + return -EINVAL; + + return __vlan_del(pv, vid); +} + +void nbp_vlan_flush(struct net_bridge_port *port) +{ + struct net_port_vlans *pv; + + ASSERT_RTNL(); + + pv = rtnl_dereference(port->vlan_info); + if (!pv) + return; + + __vlan_flush(pv); +} -- cgit v1.2.3 From a37b85c9fbd1dc69fbec3985763f373203eaf9e3 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:10 +0000 Subject: bridge: Validate that vlan is permitted on ingress When a frame arrives on a port or transmitted by the bridge, if we have VLANs configured, validate that a given VLAN is allowed to enter the bridge. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/br_device.c | 3 +++ net/bridge/br_input.c | 4 ++++ net/bridge/br_private.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++ net/bridge/br_vlan.c | 25 +++++++++++++++++++++++ 4 files changed, 85 insertions(+) diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index ca98fa5b2c78..35a2c2c84f33 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -45,6 +45,9 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) brstats->tx_bytes += skb->len; u64_stats_update_end(&brstats->syncp); + if (!br_allowed_ingress(br, br_get_vlan_info(br), skb)) + goto out; + BR_INPUT_SKB_CB(skb)->brdev = dev; skb_reset_mac_header(skb); diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 4b34207419b1..4ef3f6b17bd0 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "br_private.h" /* Hook for brouter */ @@ -54,6 +55,9 @@ int br_handle_frame_finish(struct sk_buff *skb) if (!p || p->state == BR_STATE_DISABLED) goto drop; + if (!br_allowed_ingress(p->br, nbp_get_vlan_info(p), skb)) + goto drop; + /* insert into forwarding database after filtering to avoid spoofing */ br = p->br; br_fdb_update(br, p, eth_hdr(skb)->h_source); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 1f3b309beea8..ed7c764ee9da 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -552,6 +552,8 @@ static inline void br_mdb_uninit(void) /* br_vlan.c */ #ifdef CONFIG_BRIDGE_VLAN_FILTERING +extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, + struct sk_buff *skb); extern int br_vlan_add(struct net_bridge *br, u16 vid); extern int br_vlan_delete(struct net_bridge *br, u16 vid); extern void br_vlan_flush(struct net_bridge *br); @@ -559,7 +561,43 @@ extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid); extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); extern void nbp_vlan_flush(struct net_bridge_port *port); + +static inline struct net_port_vlans *br_get_vlan_info( + const struct net_bridge *br) +{ + return rcu_dereference(br->vlan_info); +} + +static inline struct net_port_vlans *nbp_get_vlan_info( + const struct net_bridge_port *p) +{ + return rcu_dereference(p->vlan_info); +} + +/* Since bridge now depends on 8021Q module, but the time bridge sees the + * skb, the vlan tag will always be present if the frame was tagged. + */ +static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) +{ + int err = 0; + + if (vlan_tx_tag_present(skb)) + *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; + else { + *vid = 0; + err = -EINVAL; + } + + return err; +} #else +static inline bool br_allowed_ingress(struct net_bridge *br, + struct net_port_vlans *v, + struct sk_buff *skb) +{ + return true; +} + static inline int br_vlan_add(struct net_bridge *br, u16 vid) { return -EOPNOTSUPP; @@ -588,6 +626,21 @@ static inline void nbp_vlan_flush(struct net_bridge_port *port) { } +static inline struct net_port_vlans *br_get_vlan_info( + const struct net_bridge *br) +{ + return NULL; +} +static inline struct net_port_vlans *nbp_get_vlan_info( + const struct net_bridge_port *p) +{ + return NULL; +} + +static inline u16 br_vlan_get_tag(const struct sk_buff *skb) +{ + return 0; +} #endif /* br_netfilter.c */ diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 209464ef5242..8b4bcd8ff46e 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -64,6 +64,31 @@ static void __vlan_flush(struct net_port_vlans *v) kfree_rcu(v, rcu); } +/* Called under RCU */ +bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, + struct sk_buff *skb) +{ + u16 vid; + + /* If VLAN filtering is disabled on the bridge, all packets are + * permitted. + */ + if (!br->vlan_enabled) + return true; + + /* If there are no vlan in the permitted list, all packets are + * rejected. + */ + if (!v) + return false; + + br_vlan_get_tag(skb, &vid); + if (test_bit(vid, v->vlan_bitmap)) + return true; + + return false; +} + /* Must be protected by RTNL */ int br_vlan_add(struct net_bridge *br, u16 vid) { -- cgit v1.2.3 From 85f46c6baef1486ce20e13dd7cdea5dd15be2a90 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:11 +0000 Subject: bridge: Verify that a vlan is allowed to egress on given port When bridge forwards a frame, make sure that a frame is allowed to egress on that port. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/br_forward.c | 1 + net/bridge/br_input.c | 10 ++++++++++ net/bridge/br_private.h | 10 ++++++++++ net/bridge/br_vlan.c | 20 ++++++++++++++++++++ 4 files changed, 41 insertions(+) diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index 02015a505d2a..35b0671f135d 100644 --- a/net/bridge/br_forward.c +++ b/net/bridge/br_forward.c @@ -31,6 +31,7 @@ static inline int should_deliver(const struct net_bridge_port *p, const struct sk_buff *skb) { return (((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) && + br_allowed_egress(p->br, nbp_get_vlan_info(p), skb) && p->state == BR_STATE_FORWARDING); } diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 4ef3f6b17bd0..787d7dad6b7e 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -35,6 +35,16 @@ static int br_pass_frame_up(struct sk_buff *skb) brstats->rx_bytes += skb->len; u64_stats_update_end(&brstats->syncp); + /* Bridge is just like any other port. Make sure the + * packet is allowed except in promisc modue when someone + * may be running packet capture. + */ + if (!(brdev->flags & IFF_PROMISC) && + !br_allowed_egress(br, br_get_vlan_info(br), skb)) { + kfree_skb(skb); + return NET_RX_DROP; + } + indev = skb->dev; skb->dev = brdev; diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index ed7c764ee9da..f0f24610d111 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -554,6 +554,9 @@ static inline void br_mdb_uninit(void) #ifdef CONFIG_BRIDGE_VLAN_FILTERING extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, struct sk_buff *skb); +extern bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + const struct sk_buff *skb); extern int br_vlan_add(struct net_bridge *br, u16 vid); extern int br_vlan_delete(struct net_bridge *br, u16 vid); extern void br_vlan_flush(struct net_bridge *br); @@ -598,6 +601,13 @@ static inline bool br_allowed_ingress(struct net_bridge *br, return true; } +static inline bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + const struct sk_buff *skb) +{ + return true; +} + static inline int br_vlan_add(struct net_bridge *br, u16 vid) { return -EOPNOTSUPP; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 8b4bcd8ff46e..d8690bfe63d4 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -89,6 +89,26 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, return false; } +/* Called under RCU. */ +bool br_allowed_egress(struct net_bridge *br, + const struct net_port_vlans *v, + const struct sk_buff *skb) +{ + u16 vid; + + if (!br->vlan_enabled) + return true; + + if (!v) + return false; + + br_vlan_get_tag(skb, &vid); + if (test_bit(vid, v->vlan_bitmap)) + return true; + + return false; +} + /* Must be protected by RTNL */ int br_vlan_add(struct net_bridge *br, u16 vid) { -- cgit v1.2.3 From 407af3299ef1ac7e87ce3fb530e32a009d1a9efd Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:12 +0000 Subject: bridge: Add netlink interface to configure vlans on bridge ports Add a netlink interface to add and remove vlan configuration on bridge port. The interface uses the RTM_SETLINK message and encodes the vlan configuration inside the IFLA_AF_SPEC. It is possble to include multiple vlans to either add or remove in a single message. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- include/linux/netdevice.h | 2 + include/uapi/linux/if_bridge.h | 9 +++ net/bridge/br_device.c | 1 + net/bridge/br_if.c | 1 + net/bridge/br_netlink.c | 139 +++++++++++++++++++++++++++++++++++------ net/bridge/br_private.h | 1 + net/core/rtnetlink.c | 72 +++++++++++++++++++++ 7 files changed, 207 insertions(+), 18 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 25bd46f52877..1b90f9401000 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1020,6 +1020,8 @@ struct net_device_ops { int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev); + int (*ndo_bridge_dellink)(struct net_device *dev, + struct nlmsghdr *nlh); int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); }; diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index 5db297514aec..3ca9817ca7e8 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -108,15 +108,24 @@ struct __fdb_entry { * [IFLA_AF_SPEC] = { * [IFLA_BRIDGE_FLAGS] * [IFLA_BRIDGE_MODE] + * [IFLA_BRIDGE_VLAN_INFO] * } */ enum { IFLA_BRIDGE_FLAGS, IFLA_BRIDGE_MODE, + IFLA_BRIDGE_VLAN_INFO, __IFLA_BRIDGE_MAX, }; #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1) +#define BRIDGE_VLAN_INFO_MASTER (1<<0) /* Operate on Bridge device as well */ + +struct bridge_vlan_info { + u16 flags; + u16 vid; +}; + /* Bridge multicast database attributes * [MDBA_MDB] = { * [MDBA_MDB_ENTRY] = { diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 35a2c2c84f33..091bedf266a0 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -316,6 +316,7 @@ static const struct net_device_ops br_netdev_ops = { .ndo_fdb_dump = br_fdb_dump, .ndo_bridge_getlink = br_getlink, .ndo_bridge_setlink = br_setlink, + .ndo_bridge_dellink = br_dellink, }; static void br_dev_free(struct net_device *dev) diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index af9d65ab4001..335c60cebfd1 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -23,6 +23,7 @@ #include #include #include +#include #include "br_private.h" diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 39ca9796f3f7..534a9f4587a9 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "br_private.h" #include "br_private_stp.h" @@ -119,10 +120,14 @@ nla_put_failure: */ void br_ifinfo_notify(int event, struct net_bridge_port *port) { - struct net *net = dev_net(port->dev); + struct net *net; struct sk_buff *skb; int err = -ENOBUFS; + if (!port) + return; + + net = dev_net(port->dev); br_debug(port->br, "port %u(%s) event %d\n", (unsigned int)port->port_no, port->dev->name, event); @@ -144,6 +149,7 @@ errout: rtnl_set_sk_err(net, RTNLGRP_LINK, err); } + /* * Dump information about all ports, in response to GETLINK */ @@ -162,6 +168,64 @@ out: return err; } +const struct nla_policy ifla_br_policy[IFLA_MAX+1] = { + [IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 }, + [IFLA_BRIDGE_MODE] = { .type = NLA_U16 }, + [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY, + .len = sizeof(struct bridge_vlan_info), }, +}; + +static int br_afspec(struct net_bridge *br, + struct net_bridge_port *p, + struct nlattr *af_spec, + int cmd) +{ + struct nlattr *tb[IFLA_BRIDGE_MAX+1]; + int err = 0; + + err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy); + if (err) + return err; + + if (tb[IFLA_BRIDGE_VLAN_INFO]) { + struct bridge_vlan_info *vinfo; + + vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]); + + if (vinfo->vid >= VLAN_N_VID) + return -EINVAL; + + switch (cmd) { + case RTM_SETLINK: + if (p) { + err = nbp_vlan_add(p, vinfo->vid); + if (err) + break; + + if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) + err = br_vlan_add(p->br, vinfo->vid); + } else + err = br_vlan_add(br, vinfo->vid); + + if (err) + break; + + break; + + case RTM_DELLINK: + if (p) { + nbp_vlan_delete(p, vinfo->vid); + if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) + br_vlan_delete(p->br, vinfo->vid); + } else + br_vlan_delete(br, vinfo->vid); + break; + } + } + + return err; +} + static const struct nla_policy ifla_brport_policy[IFLA_BRPORT_MAX + 1] = { [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, [IFLA_BRPORT_COST] = { .type = NLA_U32 }, @@ -241,6 +305,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) { struct ifinfomsg *ifm; struct nlattr *protinfo; + struct nlattr *afspec; struct net_bridge_port *p; struct nlattr *tb[IFLA_BRPORT_MAX + 1]; int err; @@ -248,38 +313,76 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) ifm = nlmsg_data(nlh); protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO); - if (!protinfo) + afspec = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_AF_SPEC); + if (!protinfo && !afspec) return 0; p = br_port_get_rtnl(dev); - if (!p) + /* We want to accept dev as bridge itself if the AF_SPEC + * is set to see if someone is setting vlan info on the brigde + */ + if (!p && ((dev->priv_flags & IFF_EBRIDGE) && !afspec)) return -EINVAL; - if (protinfo->nla_type & NLA_F_NESTED) { - err = nla_parse_nested(tb, IFLA_BRPORT_MAX, - protinfo, ifla_brport_policy); + if (p && protinfo) { + if (protinfo->nla_type & NLA_F_NESTED) { + err = nla_parse_nested(tb, IFLA_BRPORT_MAX, + protinfo, ifla_brport_policy); + if (err) + return err; + + spin_lock_bh(&p->br->lock); + err = br_setport(p, tb); + spin_unlock_bh(&p->br->lock); + } else { + /* Binary compatability with old RSTP */ + if (nla_len(protinfo) < sizeof(u8)) + return -EINVAL; + + spin_lock_bh(&p->br->lock); + err = br_set_port_state(p, nla_get_u8(protinfo)); + spin_unlock_bh(&p->br->lock); + } if (err) - return err; - - spin_lock_bh(&p->br->lock); - err = br_setport(p, tb); - spin_unlock_bh(&p->br->lock); - } else { - /* Binary compatability with old RSTP */ - if (nla_len(protinfo) < sizeof(u8)) - return -EINVAL; + goto out; + } - spin_lock_bh(&p->br->lock); - err = br_set_port_state(p, nla_get_u8(protinfo)); - spin_unlock_bh(&p->br->lock); + if (afspec) { + err = br_afspec((struct net_bridge *)netdev_priv(dev), p, + afspec, RTM_SETLINK); } if (err == 0) br_ifinfo_notify(RTM_NEWLINK, p); +out: return err; } +/* Delete port information */ +int br_dellink(struct net_device *dev, struct nlmsghdr *nlh) +{ + struct ifinfomsg *ifm; + struct nlattr *afspec; + struct net_bridge_port *p; + int err; + + ifm = nlmsg_data(nlh); + + afspec = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_AF_SPEC); + if (!afspec) + return 0; + + p = br_port_get_rtnl(dev); + /* We want to accept dev as bridge itself as well */ + if (!p && !(dev->priv_flags & IFF_EBRIDGE)) + return -EINVAL; + + err = br_afspec((struct net_bridge *)netdev_priv(dev), p, + afspec, RTM_DELLINK); + + return err; +} static int br_validate(struct nlattr *tb[], struct nlattr *data[]) { if (tb[IFLA_ADDRESS]) { diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index f0f24610d111..a42f9d49a64e 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -713,6 +713,7 @@ extern int br_netlink_init(void); extern void br_netlink_fini(void); extern void br_ifinfo_notify(int event, struct net_bridge_port *port); extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); +extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index c1e4db60eeca..2c9ccbfbd93c 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2464,6 +2464,77 @@ out: return err; } +static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, + void *arg) +{ + struct net *net = sock_net(skb->sk); + struct ifinfomsg *ifm; + struct net_device *dev; + struct nlattr *br_spec, *attr = NULL; + int rem, err = -EOPNOTSUPP; + u16 oflags, flags = 0; + bool have_flags = false; + + if (nlmsg_len(nlh) < sizeof(*ifm)) + return -EINVAL; + + ifm = nlmsg_data(nlh); + if (ifm->ifi_family != AF_BRIDGE) + return -EPFNOSUPPORT; + + dev = __dev_get_by_index(net, ifm->ifi_index); + if (!dev) { + pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); + return -ENODEV; + } + + br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); + if (br_spec) { + nla_for_each_nested(attr, br_spec, rem) { + if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { + have_flags = true; + flags = nla_get_u16(attr); + break; + } + } + } + + oflags = flags; + + if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { + struct net_device *br_dev = netdev_master_upper_dev_get(dev); + + if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { + err = -EOPNOTSUPP; + goto out; + } + + err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh); + if (err) + goto out; + + flags &= ~BRIDGE_FLAGS_MASTER; + } + + if ((flags & BRIDGE_FLAGS_SELF)) { + if (!dev->netdev_ops->ndo_bridge_dellink) + err = -EOPNOTSUPP; + else + err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh); + + if (!err) + flags &= ~BRIDGE_FLAGS_SELF; + } + + if (have_flags) + memcpy(nla_data(attr), &flags, sizeof(flags)); + /* Generate event to notify upper layer of bridge change */ + if (!err) + err = rtnl_bridge_notify(dev, oflags); +out: + return err; +} + /* Protected by RTNL sempahore. */ static struct rtattr **rta_buf; static int rtattr_max; @@ -2647,6 +2718,7 @@ void __init rtnetlink_init(void) rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); + rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); } -- cgit v1.2.3 From 6cbdceeb1cb12c7d620161925a8c3e81daadb2e4 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:13 +0000 Subject: bridge: Dump vlan information from a bridge port Using the RTM_GETLINK dump the vlan filter list of a given bridge port. The information depends on setting the filter flag similar to how nic VF info is dumped. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +- include/linux/netdevice.h | 3 +- include/uapi/linux/rtnetlink.h | 1 + net/bridge/br_netlink.c | 94 +++++++++++++++++++++++---- net/bridge/br_private.h | 3 +- net/bridge/br_vlan.c | 2 + net/core/rtnetlink.c | 16 +++-- 7 files changed, 104 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 6999269b3a4a..4e2aa47193cb 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -7079,7 +7079,8 @@ static int ixgbe_ndo_bridge_setlink(struct net_device *dev, } static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, - struct net_device *dev) + struct net_device *dev, + u32 filter_mask) { struct ixgbe_adapter *adapter = netdev_priv(dev); u16 mode; diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 1b90f9401000..1964ca66df56 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1019,7 +1019,8 @@ struct net_device_ops { struct nlmsghdr *nlh); int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, - struct net_device *dev); + struct net_device *dev, + u32 filter_mask); int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh); int (*ndo_change_carrier)(struct net_device *dev, diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h index 7a5eb196ade9..7a2144e1afae 100644 --- a/include/uapi/linux/rtnetlink.h +++ b/include/uapi/linux/rtnetlink.h @@ -630,6 +630,7 @@ struct tcamsg { /* New extended info filters for IFLA_EXT_MASK */ #define RTEXT_FILTER_VF (1 << 0) +#define RTEXT_FILTER_BRVLAN (1 << 1) /* End of information exported to user level */ diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 534a9f4587a9..fe1980d5a7e4 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -65,15 +65,21 @@ static int br_port_fill_attrs(struct sk_buff *skb, * Create one netlink message for one interface * Contains port and master info as well as carrier and bridge state. */ -static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *port, - u32 pid, u32 seq, int event, unsigned int flags) +static int br_fill_ifinfo(struct sk_buff *skb, + const struct net_bridge_port *port, + u32 pid, u32 seq, int event, unsigned int flags, + u32 filter_mask, const struct net_device *dev) { - const struct net_bridge *br = port->br; - const struct net_device *dev = port->dev; + const struct net_bridge *br; struct ifinfomsg *hdr; struct nlmsghdr *nlh; u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; + if (port) + br = port->br; + else + br = netdev_priv(dev); + br_debug(br, "br_fill_info event %d port %s master %s\n", event, dev->name, br->dev->name); @@ -99,7 +105,7 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por nla_put_u32(skb, IFLA_LINK, dev->iflink))) goto nla_put_failure; - if (event == RTM_NEWLINK) { + if (event == RTM_NEWLINK && port) { struct nlattr *nest = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); @@ -108,6 +114,40 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por nla_nest_end(skb, nest); } + /* Check if the VID information is requested */ + if (filter_mask & RTEXT_FILTER_BRVLAN) { + struct nlattr *af; + const struct net_port_vlans *pv; + struct bridge_vlan_info vinfo; + u16 vid; + + if (port) + pv = nbp_get_vlan_info(port); + else + pv = br_get_vlan_info(br); + + if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) + goto done; + + af = nla_nest_start(skb, IFLA_AF_SPEC); + if (!af) + goto nla_put_failure; + + for (vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN); + vid < BR_VLAN_BITMAP_LEN; + vid = find_next_bit(pv->vlan_bitmap, + BR_VLAN_BITMAP_LEN, vid+1)) { + vinfo.vid = vid; + vinfo.flags = 0; + if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, + sizeof(vinfo), &vinfo)) + goto nla_put_failure; + } + + nla_nest_end(skb, af); + } + +done: return nlmsg_end(skb, nlh); nla_put_failure: @@ -135,7 +175,7 @@ void br_ifinfo_notify(int event, struct net_bridge_port *port) if (skb == NULL) goto errout; - err = br_fill_ifinfo(skb, port, 0, 0, event, 0); + err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev); if (err < 0) { /* -EMSGSIZE implies BUG in br_nlmsg_size() */ WARN_ON(err == -EMSGSIZE); @@ -154,16 +194,17 @@ errout: * Dump information about all ports, in response to GETLINK */ int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, - struct net_device *dev) + struct net_device *dev, u32 filter_mask) { int err = 0; struct net_bridge_port *port = br_port_get_rcu(dev); - /* not a bridge port */ - if (!port) + /* not a bridge port and */ + if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN)) goto out; - err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI); + err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI, + filter_mask, dev); out: return err; } @@ -395,6 +436,29 @@ static int br_validate(struct nlattr *tb[], struct nlattr *data[]) return 0; } +static size_t br_get_link_af_size(const struct net_device *dev) +{ + struct net_port_vlans *pv; + + if (br_port_exists(dev)) + pv = nbp_get_vlan_info(br_port_get_rcu(dev)); + else if (dev->priv_flags & IFF_EBRIDGE) + pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); + else + return 0; + + if (!pv) + return 0; + + /* Each VLAN is returned in bridge_vlan_info along with flags */ + return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info)); +} + +struct rtnl_af_ops br_af_ops = { + .family = AF_BRIDGE, + .get_link_af_size = br_get_link_af_size, +}; + struct rtnl_link_ops br_link_ops __read_mostly = { .kind = "bridge", .priv_size = sizeof(struct net_bridge), @@ -408,11 +472,18 @@ int __init br_netlink_init(void) int err; br_mdb_init(); - err = rtnl_link_register(&br_link_ops); + err = rtnl_af_register(&br_af_ops); if (err) goto out; + err = rtnl_link_register(&br_link_ops); + if (err) + goto out_af; + return 0; + +out_af: + rtnl_af_unregister(&br_af_ops); out: br_mdb_uninit(); return err; @@ -421,5 +492,6 @@ out: void __exit br_netlink_fini(void) { br_mdb_uninit(); + rtnl_af_unregister(&br_af_ops); rtnl_link_unregister(&br_link_ops); } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index a42f9d49a64e..ce2235255c2f 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -73,6 +73,7 @@ struct net_port_vlans { } parent; struct rcu_head rcu; unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; + u16 num_vlans; }; struct net_bridge_fdb_entry @@ -715,7 +716,7 @@ extern void br_ifinfo_notify(int event, struct net_bridge_port *port); extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, - struct net_device *dev); + struct net_device *dev, u32 filter_mask); #ifdef CONFIG_SYSFS /* br_sysfs_if.c */ diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index d8690bfe63d4..f2bf5a197ea3 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -28,6 +28,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid) } set_bit(vid, v->vlan_bitmap); + v->num_vlans++; return 0; } @@ -44,6 +45,7 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) } clear_bit(vid, v->vlan_bitmap); + v->num_vlans--; if (bitmap_empty(v->vlan_bitmap, BR_VLAN_BITMAP_LEN)) { if (v->port_idx) rcu_assign_pointer(v->parent.port->vlan_info, NULL); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 2c9ccbfbd93c..f3a112ec86d5 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2315,6 +2315,13 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) int idx = 0; u32 portid = NETLINK_CB(cb->skb).portid; u32 seq = cb->nlh->nlmsg_seq; + struct nlattr *extfilt; + u32 filter_mask = 0; + + extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct rtgenmsg), + IFLA_EXT_MASK); + if (extfilt) + filter_mask = nla_get_u32(extfilt); rcu_read_lock(); for_each_netdev_rcu(net, dev) { @@ -2324,14 +2331,15 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { if (idx >= cb->args[0] && br_dev->netdev_ops->ndo_bridge_getlink( - skb, portid, seq, dev) < 0) + skb, portid, seq, dev, filter_mask) < 0) break; idx++; } if (ops->ndo_bridge_getlink) { if (idx >= cb->args[0] && - ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0) + ops->ndo_bridge_getlink(skb, portid, seq, dev, + filter_mask) < 0) break; idx++; } @@ -2372,14 +2380,14 @@ static int rtnl_bridge_notify(struct net_device *dev, u16 flags) if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) && br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { - err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev); + err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0); if (err < 0) goto errout; } if ((flags & BRIDGE_FLAGS_SELF) && dev->netdev_ops->ndo_bridge_getlink) { - err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev); + err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0); if (err < 0) goto errout; } -- cgit v1.2.3 From 7885198861fc9a3dfdc6bb90dc0ba12689d6cd57 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:14 +0000 Subject: bridge: Implement vlan ingress/egress policy with PVID. At ingress, any untagged traffic is assigned to the PVID. Any tagged traffic is filtered according to membership bitmap. At egress, if the vlan matches the PVID, the frame is sent untagged. Otherwise the frame is sent tagged. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/8021q/vlan_core.c | 1 + net/bridge/br_device.c | 3 +- net/bridge/br_forward.c | 8 +++++ net/bridge/br_input.c | 7 ++++- net/bridge/br_private.h | 34 ++++++++++++++++++-- net/bridge/br_vlan.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++--- 6 files changed, 126 insertions(+), 10 deletions(-) diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index 71b64fde8dc9..f3b6f515eba6 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -144,6 +144,7 @@ err_free: kfree_skb(skb); return NULL; } +EXPORT_SYMBOL(vlan_untag); /* diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 091bedf266a0..9509139da49c 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -30,6 +30,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) struct net_bridge_fdb_entry *dst; struct net_bridge_mdb_entry *mdst; struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats); + u16 vid = 0; rcu_read_lock(); #ifdef CONFIG_BRIDGE_NETFILTER @@ -45,7 +46,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) brstats->tx_bytes += skb->len; u64_stats_update_end(&brstats->syncp); - if (!br_allowed_ingress(br, br_get_vlan_info(br), skb)) + if (!br_allowed_ingress(br, br_get_vlan_info(br), skb, &vid)) goto out; BR_INPUT_SKB_CB(skb)->brdev = dev; diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index 35b0671f135d..092b20e4ee4c 100644 --- a/net/bridge/br_forward.c +++ b/net/bridge/br_forward.c @@ -64,6 +64,10 @@ int br_forward_finish(struct sk_buff *skb) static void __br_deliver(const struct net_bridge_port *to, struct sk_buff *skb) { + skb = br_handle_vlan(to->br, nbp_get_vlan_info(to), skb); + if (!skb) + return; + skb->dev = to->dev; if (unlikely(netpoll_tx_running(to->br->dev))) { @@ -89,6 +93,10 @@ static void __br_forward(const struct net_bridge_port *to, struct sk_buff *skb) return; } + skb = br_handle_vlan(to->br, nbp_get_vlan_info(to), skb); + if (!skb) + return; + indev = skb->dev; skb->dev = to->dev; skb_forward_csum(skb); diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 787d7dad6b7e..a63f227ad963 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -45,6 +45,10 @@ static int br_pass_frame_up(struct sk_buff *skb) return NET_RX_DROP; } + skb = br_handle_vlan(br, br_get_vlan_info(br), skb); + if (!skb) + return NET_RX_DROP; + indev = skb->dev; skb->dev = brdev; @@ -61,11 +65,12 @@ int br_handle_frame_finish(struct sk_buff *skb) struct net_bridge_fdb_entry *dst; struct net_bridge_mdb_entry *mdst; struct sk_buff *skb2; + u16 vid = 0; if (!p || p->state == BR_STATE_DISABLED) goto drop; - if (!br_allowed_ingress(p->br, nbp_get_vlan_info(p), skb)) + if (!br_allowed_ingress(p->br, nbp_get_vlan_info(p), skb, &vid)) goto drop; /* insert into forwarding database after filtering to avoid spoofing */ diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index ce2235255c2f..ea8e7efd9137 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -67,6 +67,7 @@ struct br_ip struct net_port_vlans { u16 port_idx; + u16 pvid; union { struct net_bridge_port *port; struct net_bridge *br; @@ -554,10 +555,13 @@ static inline void br_mdb_uninit(void) /* br_vlan.c */ #ifdef CONFIG_BRIDGE_VLAN_FILTERING extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, - struct sk_buff *skb); + struct sk_buff *skb, u16 *vid); extern bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, const struct sk_buff *skb); +extern struct sk_buff *br_handle_vlan(struct net_bridge *br, + const struct net_port_vlans *v, + struct sk_buff *skb); extern int br_vlan_add(struct net_bridge *br, u16 vid); extern int br_vlan_delete(struct net_bridge *br, u16 vid); extern void br_vlan_flush(struct net_bridge *br); @@ -594,10 +598,23 @@ static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) return err; } + +static inline u16 br_get_pvid(const struct net_port_vlans *v) +{ + /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if + * vid wasn't set + */ + smp_rmb(); + return (v->pvid & VLAN_TAG_PRESENT) ? + (v->pvid & ~VLAN_TAG_PRESENT) : + VLAN_N_VID; +} + #else static inline bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, - struct sk_buff *skb) + struct sk_buff *skb, + u16 *vid) { return true; } @@ -609,6 +626,13 @@ static inline bool br_allowed_egress(struct net_bridge *br, return true; } +static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, + const struct net_port_vlans *v, + struct sk_buff *skb) +{ + return skb; +} + static inline int br_vlan_add(struct net_bridge *br, u16 vid) { return -EOPNOTSUPP; @@ -648,10 +672,14 @@ static inline struct net_port_vlans *nbp_get_vlan_info( return NULL; } -static inline u16 br_vlan_get_tag(const struct sk_buff *skb) +static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) { return 0; } +static inline u16 br_get_pvid(const struct net_port_vlans *v) +{ + return VLAN_N_VID; /* Returns invalid vid */ +} #endif /* br_netfilter.c */ diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index f2bf5a197ea3..20057de56db0 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -66,12 +66,68 @@ static void __vlan_flush(struct net_port_vlans *v) kfree_rcu(v, rcu); } -/* Called under RCU */ -bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, - struct sk_buff *skb) +/* Strip the tag from the packet. Will return skb with tci set 0. */ +static struct sk_buff *br_vlan_untag(struct sk_buff *skb) +{ + if (skb->protocol != htons(ETH_P_8021Q)) { + skb->vlan_tci = 0; + return skb; + } + + skb->vlan_tci = 0; + skb = vlan_untag(skb); + if (skb) + skb->vlan_tci = 0; + + return skb; +} + +struct sk_buff *br_handle_vlan(struct net_bridge *br, + const struct net_port_vlans *pv, + struct sk_buff *skb) { u16 vid; + if (!br->vlan_enabled) + goto out; + + /* At this point, we know that the frame was filtered and contains + * a valid vlan id. If the vlan id matches the pvid of current port + * send untagged; otherwise, send taged. + */ + br_vlan_get_tag(skb, &vid); + if (vid == br_get_pvid(pv)) + skb = br_vlan_untag(skb); + else { + /* Egress policy says "send tagged". If output device + * is the bridge, we need to add the VLAN header + * ourselves since we'll be going through the RX path. + * Sending to ports puts the frame on the TX path and + * we let dev_hard_start_xmit() add the header. + */ + if (skb->protocol != htons(ETH_P_8021Q) && + pv->port_idx == 0) { + /* vlan_put_tag expects skb->data to point to + * mac header. + */ + skb_push(skb, ETH_HLEN); + skb = __vlan_put_tag(skb, skb->vlan_tci); + if (!skb) + goto out; + /* put skb->data back to where it was */ + skb_pull(skb, ETH_HLEN); + skb->vlan_tci = 0; + } + } + +out: + return skb; +} + +/* Called under RCU */ +bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, + struct sk_buff *skb, u16 *vid) +{ /* If VLAN filtering is disabled on the bridge, all packets are * permitted. */ @@ -84,8 +140,25 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, if (!v) return false; - br_vlan_get_tag(skb, &vid); - if (test_bit(vid, v->vlan_bitmap)) + if (br_vlan_get_tag(skb, vid)) { + u16 pvid = br_get_pvid(v); + + /* Frame did not have a tag. See if pvid is set + * on this port. That tells us which vlan untagged + * traffic belongs to. + */ + if (pvid == VLAN_N_VID) + return false; + + /* PVID is set on this port. Any untagged ingress + * frame is considered to belong to this vlan. + */ + __vlan_hwaccel_put_tag(skb, pvid); + return true; + } + + /* Frame had a valid vlan tag. See if vlan is allowed */ + if (test_bit(*vid, v->vlan_bitmap)) return true; return false; -- cgit v1.2.3 From 552406c488ec2cf1aaf8b5bd24d1750c9fd6d8cc Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:15 +0000 Subject: bridge: Add the ability to configure pvid A user may designate a certain vlan as PVID. This means that any ingress frame that does not contain a vlan tag is assigned to this vlan and any forwarding decisions are made with this vlan in mind. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- include/uapi/linux/if_bridge.h | 1 + net/bridge/br_netlink.c | 11 +++++++--- net/bridge/br_private.h | 8 +++---- net/bridge/br_vlan.c | 47 +++++++++++++++++++++++++++++++++--------- 4 files changed, 50 insertions(+), 17 deletions(-) diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index 3ca9817ca7e8..c6c30e28f396 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -120,6 +120,7 @@ enum { #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1) #define BRIDGE_VLAN_INFO_MASTER (1<<0) /* Operate on Bridge device as well */ +#define BRIDGE_VLAN_INFO_PVID (1<<1) /* VLAN is PVID, ingress untagged */ struct bridge_vlan_info { u16 flags; diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index fe1980d5a7e4..e044cc0b5650 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -120,6 +120,7 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_port_vlans *pv; struct bridge_vlan_info vinfo; u16 vid; + u16 pvid; if (port) pv = nbp_get_vlan_info(port); @@ -133,12 +134,15 @@ static int br_fill_ifinfo(struct sk_buff *skb, if (!af) goto nla_put_failure; + pvid = br_get_pvid(pv); for (vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN); vid < BR_VLAN_BITMAP_LEN; vid = find_next_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN, vid+1)) { vinfo.vid = vid; vinfo.flags = 0; + if (vid == pvid) + vinfo.flags |= BRIDGE_VLAN_INFO_PVID; if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo)) goto nla_put_failure; @@ -239,14 +243,15 @@ static int br_afspec(struct net_bridge *br, switch (cmd) { case RTM_SETLINK: if (p) { - err = nbp_vlan_add(p, vinfo->vid); + err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); if (err) break; if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) - err = br_vlan_add(p->br, vinfo->vid); + err = br_vlan_add(p->br, vinfo->vid, + vinfo->flags); } else - err = br_vlan_add(br, vinfo->vid); + err = br_vlan_add(br, vinfo->vid, vinfo->flags); if (err) break; diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index ea8e7efd9137..1ae6395a0369 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -562,11 +562,11 @@ extern bool br_allowed_egress(struct net_bridge *br, extern struct sk_buff *br_handle_vlan(struct net_bridge *br, const struct net_port_vlans *v, struct sk_buff *skb); -extern int br_vlan_add(struct net_bridge *br, u16 vid); +extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); extern int br_vlan_delete(struct net_bridge *br, u16 vid); extern void br_vlan_flush(struct net_bridge *br); extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); -extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid); +extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); extern void nbp_vlan_flush(struct net_bridge_port *port); @@ -633,7 +633,7 @@ static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, return skb; } -static inline int br_vlan_add(struct net_bridge *br, u16 vid) +static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) { return -EOPNOTSUPP; } @@ -647,7 +647,7 @@ static inline void br_vlan_flush(struct net_bridge *br) { } -static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid) +static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) { return -EOPNOTSUPP; } diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 20057de56db0..c79940cff3a1 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -5,12 +5,33 @@ #include "br_private.h" -static int __vlan_add(struct net_port_vlans *v, u16 vid) +static void __vlan_add_pvid(struct net_port_vlans *v, u16 vid) +{ + if (v->pvid == vid) + return; + + smp_wmb(); + v->pvid = vid; +} + +static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid) +{ + if (v->pvid != vid) + return; + + smp_wmb(); + v->pvid = 0; +} + +static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) { int err; - if (test_bit(vid, v->vlan_bitmap)) - return -EEXIST; + if (test_bit(vid, v->vlan_bitmap)) { + if (flags & BRIDGE_VLAN_INFO_PVID) + __vlan_add_pvid(v, vid); + return 0; + } if (v->port_idx && vid) { struct net_device *dev = v->parent.port->dev; @@ -29,6 +50,9 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid) set_bit(vid, v->vlan_bitmap); v->num_vlans++; + if (flags & BRIDGE_VLAN_INFO_PVID) + __vlan_add_pvid(v, vid); + return 0; } @@ -37,6 +61,8 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) if (!test_bit(vid, v->vlan_bitmap)) return -EINVAL; + __vlan_delete_pvid(v, vid); + if (v->port_idx && vid) { struct net_device *dev = v->parent.port->dev; @@ -58,6 +84,8 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) static void __vlan_flush(struct net_port_vlans *v) { + smp_wmb(); + v->pvid = 0; bitmap_zero(v->vlan_bitmap, BR_VLAN_BITMAP_LEN); if (v->port_idx) rcu_assign_pointer(v->parent.port->vlan_info, NULL); @@ -185,7 +213,7 @@ bool br_allowed_egress(struct net_bridge *br, } /* Must be protected by RTNL */ -int br_vlan_add(struct net_bridge *br, u16 vid) +int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) { struct net_port_vlans *pv = NULL; int err; @@ -194,7 +222,7 @@ int br_vlan_add(struct net_bridge *br, u16 vid) pv = rtnl_dereference(br->vlan_info); if (pv) - return __vlan_add(pv, vid); + return __vlan_add(pv, vid, flags); /* Create port vlan infomration */ @@ -203,7 +231,7 @@ int br_vlan_add(struct net_bridge *br, u16 vid) return -ENOMEM; pv->parent.br = br; - err = __vlan_add(pv, vid); + err = __vlan_add(pv, vid, flags); if (err) goto out; @@ -234,7 +262,6 @@ void br_vlan_flush(struct net_bridge *br) struct net_port_vlans *pv; ASSERT_RTNL(); - pv = rtnl_dereference(br->vlan_info); if (!pv) return; @@ -258,7 +285,7 @@ unlock: } /* Must be protected by RTNL */ -int nbp_vlan_add(struct net_bridge_port *port, u16 vid) +int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) { struct net_port_vlans *pv = NULL; int err; @@ -267,7 +294,7 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid) pv = rtnl_dereference(port->vlan_info); if (pv) - return __vlan_add(pv, vid); + return __vlan_add(pv, vid, flags); /* Create port vlan infomration */ @@ -279,7 +306,7 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid) pv->port_idx = port->port_no; pv->parent.port = port; - err = __vlan_add(pv, vid); + err = __vlan_add(pv, vid, flags); if (err) goto clean_up; -- cgit v1.2.3 From 2ba071ecb6d41ce172f9ccb3996f28cb337b3576 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:16 +0000 Subject: bridge: Add vlan to unicast fdb entries This patch adds vlan to unicast fdb entries that are created for learned addresses (not the manually configured ones). It adds vlan id into the hash mix and uses vlan as an addditional parameter for an entry match. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/br_device.c | 2 +- net/bridge/br_fdb.c | 69 ++++++++++++++++++++++++++++--------------------- net/bridge/br_input.c | 9 ++++--- net/bridge/br_private.h | 7 +++-- 4 files changed, 52 insertions(+), 35 deletions(-) diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 9509139da49c..d5f1d3fd4b28 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -71,7 +71,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) br_multicast_deliver(mdst, skb); else br_flood_deliver(br, skb); - } else if ((dst = __br_fdb_get(br, dest)) != NULL) + } else if ((dst = __br_fdb_get(br, dest, vid)) != NULL) br_deliver(dst->dst, skb); else br_flood_deliver(br, skb); diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index d9576e6de2b8..276a52254606 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -23,6 +23,7 @@ #include #include #include +#include #include "br_private.h" static struct kmem_cache *br_fdb_cache __read_mostly; @@ -67,11 +68,11 @@ static inline int has_expired(const struct net_bridge *br, time_before_eq(fdb->updated + hold_time(br), jiffies); } -static inline int br_mac_hash(const unsigned char *mac) +static inline int br_mac_hash(const unsigned char *mac, __u16 vid) { - /* use 1 byte of OUI cnd 3 bytes of NIC */ + /* use 1 byte of OUI and 3 bytes of NIC */ u32 key = get_unaligned((u32 *)(mac + 2)); - return jhash_1word(key, fdb_salt) & (BR_HASH_SIZE - 1); + return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); } static void fdb_rcu_free(struct rcu_head *head) @@ -132,7 +133,7 @@ void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) struct net_bridge_fdb_entry *f; /* If old entry was unassociated with any port, then delete it. */ - f = __br_fdb_get(br, br->dev->dev_addr); + f = __br_fdb_get(br, br->dev->dev_addr, 0); if (f && f->is_local && !f->dst) fdb_delete(br, f); @@ -231,13 +232,16 @@ void br_fdb_delete_by_port(struct net_bridge *br, /* No locking or refcounting, assumes caller has rcu_read_lock */ struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, - const unsigned char *addr) + const unsigned char *addr, + __u16 vid) { struct hlist_node *h; struct net_bridge_fdb_entry *fdb; - hlist_for_each_entry_rcu(fdb, h, &br->hash[br_mac_hash(addr)], hlist) { - if (ether_addr_equal(fdb->addr.addr, addr)) { + hlist_for_each_entry_rcu(fdb, h, + &br->hash[br_mac_hash(addr, vid)], hlist) { + if (ether_addr_equal(fdb->addr.addr, addr) && + fdb->vlan_id == vid) { if (unlikely(has_expired(br, fdb))) break; return fdb; @@ -261,7 +265,7 @@ int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) if (!port) ret = 0; else { - fdb = __br_fdb_get(port->br, addr); + fdb = __br_fdb_get(port->br, addr, 0); ret = fdb && fdb->dst && fdb->dst->dev != dev && fdb->dst->state == BR_STATE_FORWARDING; } @@ -325,26 +329,30 @@ int br_fdb_fillbuf(struct net_bridge *br, void *buf, } static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, - const unsigned char *addr) + const unsigned char *addr, + __u16 vid) { struct hlist_node *h; struct net_bridge_fdb_entry *fdb; hlist_for_each_entry(fdb, h, head, hlist) { - if (ether_addr_equal(fdb->addr.addr, addr)) + if (ether_addr_equal(fdb->addr.addr, addr) && + fdb->vlan_id == vid) return fdb; } return NULL; } static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, - const unsigned char *addr) + const unsigned char *addr, + __u16 vid) { struct hlist_node *h; struct net_bridge_fdb_entry *fdb; hlist_for_each_entry_rcu(fdb, h, head, hlist) { - if (ether_addr_equal(fdb->addr.addr, addr)) + if (ether_addr_equal(fdb->addr.addr, addr) && + fdb->vlan_id == vid) return fdb; } return NULL; @@ -352,7 +360,8 @@ static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, struct net_bridge_port *source, - const unsigned char *addr) + const unsigned char *addr, + __u16 vid) { struct net_bridge_fdb_entry *fdb; @@ -360,6 +369,7 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, if (fdb) { memcpy(fdb->addr.addr, addr, ETH_ALEN); fdb->dst = source; + fdb->vlan_id = vid; fdb->is_local = 0; fdb->is_static = 0; fdb->updated = fdb->used = jiffies; @@ -371,13 +381,13 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr) { - struct hlist_head *head = &br->hash[br_mac_hash(addr)]; + struct hlist_head *head = &br->hash[br_mac_hash(addr, 0)]; struct net_bridge_fdb_entry *fdb; if (!is_valid_ether_addr(addr)) return -EINVAL; - fdb = fdb_find(head, addr); + fdb = fdb_find(head, addr, 0); if (fdb) { /* it is okay to have multiple ports with same * address, just use the first one. @@ -390,7 +400,7 @@ static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, fdb_delete(br, fdb); } - fdb = fdb_create(head, source, addr); + fdb = fdb_create(head, source, addr, 0); if (!fdb) return -ENOMEM; @@ -412,9 +422,9 @@ int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, } void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, - const unsigned char *addr) + const unsigned char *addr, u16 vid) { - struct hlist_head *head = &br->hash[br_mac_hash(addr)]; + struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; /* some users want to always flood. */ @@ -426,7 +436,7 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, source->state == BR_STATE_FORWARDING)) return; - fdb = fdb_find_rcu(head, addr); + fdb = fdb_find_rcu(head, addr, vid); if (likely(fdb)) { /* attempt to update an entry for a local interface */ if (unlikely(fdb->is_local)) { @@ -441,8 +451,8 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, } } else { spin_lock(&br->hash_lock); - if (likely(!fdb_find(head, addr))) { - fdb = fdb_create(head, source, addr); + if (likely(!fdb_find(head, addr, vid))) { + fdb = fdb_create(head, source, addr, vid); if (fdb) fdb_notify(br, fdb, RTM_NEWNEIGH); } @@ -571,18 +581,18 @@ out: /* Update (create or replace) forwarding database entry */ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, - __u16 state, __u16 flags) + __u16 state, __u16 flags, __u16 vid) { struct net_bridge *br = source->br; - struct hlist_head *head = &br->hash[br_mac_hash(addr)]; + struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; - fdb = fdb_find(head, addr); + fdb = fdb_find(head, addr, vid); if (fdb == NULL) { if (!(flags & NLM_F_CREATE)) return -ENOENT; - fdb = fdb_create(head, source, addr); + fdb = fdb_create(head, source, addr, vid); if (!fdb) return -ENOMEM; fdb_notify(br, fdb, RTM_NEWNEIGH); @@ -629,11 +639,12 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], if (ndm->ndm_flags & NTF_USE) { rcu_read_lock(); - br_fdb_update(p->br, p, addr); + br_fdb_update(p->br, p, addr, 0); rcu_read_unlock(); } else { spin_lock_bh(&p->br->hash_lock); - err = fdb_add_entry(p, addr, ndm->ndm_state, nlh_flags); + err = fdb_add_entry(p, addr, ndm->ndm_state, nlh_flags, + 0); spin_unlock_bh(&p->br->hash_lock); } @@ -643,10 +654,10 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], static int fdb_delete_by_addr(struct net_bridge_port *p, const u8 *addr) { struct net_bridge *br = p->br; - struct hlist_head *head = &br->hash[br_mac_hash(addr)]; + struct hlist_head *head = &br->hash[br_mac_hash(addr, 0)]; struct net_bridge_fdb_entry *fdb; - fdb = fdb_find(head, addr); + fdb = fdb_find(head, addr, 0); if (!fdb) return -ENOENT; diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index a63f227ad963..480330151898 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -75,7 +75,7 @@ int br_handle_frame_finish(struct sk_buff *skb) /* insert into forwarding database after filtering to avoid spoofing */ br = p->br; - br_fdb_update(br, p, eth_hdr(skb)->h_source); + br_fdb_update(br, p, eth_hdr(skb)->h_source, vid); if (!is_broadcast_ether_addr(dest) && is_multicast_ether_addr(dest) && br_multicast_rcv(br, p, skb)) @@ -110,7 +110,8 @@ int br_handle_frame_finish(struct sk_buff *skb) skb2 = skb; br->dev->stats.multicast++; - } else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) { + } else if ((dst = __br_fdb_get(br, dest, vid)) && + dst->is_local) { skb2 = skb; /* Do not forward the packet since it's local. */ skb = NULL; @@ -138,8 +139,10 @@ drop: static int br_handle_local_finish(struct sk_buff *skb) { struct net_bridge_port *p = br_port_get_rcu(skb->dev); + u16 vid = 0; - br_fdb_update(p->br, p, eth_hdr(skb)->h_source); + br_vlan_get_tag(skb, &vid); + br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid); return 0; /* process further */ } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 1ae6395a0369..f4ae87b5aa6e 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -88,6 +88,7 @@ struct net_bridge_fdb_entry mac_addr addr; unsigned char is_local; unsigned char is_static; + __u16 vlan_id; }; struct net_bridge_port_group { @@ -373,7 +374,8 @@ extern void br_fdb_cleanup(unsigned long arg); extern void br_fdb_delete_by_port(struct net_bridge *br, const struct net_bridge_port *p, int do_all); extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, - const unsigned char *addr); + const unsigned char *addr, + __u16 vid); extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, unsigned long off); @@ -382,7 +384,8 @@ extern int br_fdb_insert(struct net_bridge *br, const unsigned char *addr); extern void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, - const unsigned char *addr); + const unsigned char *addr, + u16 vid); extern int br_fdb_delete(struct ndmsg *ndm, struct net_device *dev, -- cgit v1.2.3 From b0e9a30dd669a844bb4f74515f8bcd307018ffd0 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:17 +0000 Subject: bridge: Add vlan id to multicast groups Add vlan_id to multicasts groups so that we know which vlan each group belongs to and can correctly forward to appropriate vlan. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/br_multicast.c | 69 +++++++++++++++++++++++++++++++++-------------- net/bridge/br_private.h | 1 + 2 files changed, 50 insertions(+), 20 deletions(-) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 6d6f26531de2..7d886b0a8b7b 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -39,6 +39,8 @@ static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) { if (a->proto != b->proto) return 0; + if (a->vid != b->vid) + return 0; switch (a->proto) { case htons(ETH_P_IP): return a->u.ip4 == b->u.ip4; @@ -50,16 +52,19 @@ static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b) return 0; } -static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip) +static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip, + __u16 vid) { - return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1); + return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1); } #if IS_ENABLED(CONFIG_IPV6) static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb, - const struct in6_addr *ip) + const struct in6_addr *ip, + __u16 vid) { - return jhash2((__force u32 *)ip->s6_addr32, 4, mdb->secret) & (mdb->max - 1); + return jhash_2words(ipv6_addr_hash(ip), vid, + mdb->secret) & (mdb->max - 1); } #endif @@ -68,10 +73,10 @@ static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, { switch (ip->proto) { case htons(ETH_P_IP): - return __br_ip4_hash(mdb, ip->u.ip4); + return __br_ip4_hash(mdb, ip->u.ip4, ip->vid); #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): - return __br_ip6_hash(mdb, &ip->u.ip6); + return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid); #endif } return 0; @@ -101,24 +106,27 @@ struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, } static struct net_bridge_mdb_entry *br_mdb_ip4_get( - struct net_bridge_mdb_htable *mdb, __be32 dst) + struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid) { struct br_ip br_dst; br_dst.u.ip4 = dst; br_dst.proto = htons(ETH_P_IP); + br_dst.vid = vid; return br_mdb_ip_get(mdb, &br_dst); } #if IS_ENABLED(CONFIG_IPV6) static struct net_bridge_mdb_entry *br_mdb_ip6_get( - struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst) + struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst, + __u16 vid) { struct br_ip br_dst; br_dst.u.ip6 = *dst; br_dst.proto = htons(ETH_P_IPV6); + br_dst.vid = vid; return br_mdb_ip_get(mdb, &br_dst); } @@ -694,7 +702,8 @@ err: static int br_ip4_multicast_add_group(struct net_bridge *br, struct net_bridge_port *port, - __be32 group) + __be32 group, + __u16 vid) { struct br_ip br_group; @@ -703,6 +712,7 @@ static int br_ip4_multicast_add_group(struct net_bridge *br, br_group.u.ip4 = group; br_group.proto = htons(ETH_P_IP); + br_group.vid = vid; return br_multicast_add_group(br, port, &br_group); } @@ -710,7 +720,8 @@ static int br_ip4_multicast_add_group(struct net_bridge *br, #if IS_ENABLED(CONFIG_IPV6) static int br_ip6_multicast_add_group(struct net_bridge *br, struct net_bridge_port *port, - const struct in6_addr *group) + const struct in6_addr *group, + __u16 vid) { struct br_ip br_group; @@ -719,6 +730,7 @@ static int br_ip6_multicast_add_group(struct net_bridge *br, br_group.u.ip6 = *group; br_group.proto = htons(ETH_P_IPV6); + br_group.vid = vid; return br_multicast_add_group(br, port, &br_group); } @@ -895,10 +907,12 @@ static int br_ip4_multicast_igmp3_report(struct net_bridge *br, int type; int err = 0; __be32 group; + u16 vid = 0; if (!pskb_may_pull(skb, sizeof(*ih))) return -EINVAL; + br_vlan_get_tag(skb, &vid); ih = igmpv3_report_hdr(skb); num = ntohs(ih->ngrec); len = sizeof(*ih); @@ -930,7 +944,7 @@ static int br_ip4_multicast_igmp3_report(struct net_bridge *br, continue; } - err = br_ip4_multicast_add_group(br, port, group); + err = br_ip4_multicast_add_group(br, port, group, vid); if (err) break; } @@ -949,10 +963,12 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br, int len; int num; int err = 0; + u16 vid = 0; if (!pskb_may_pull(skb, sizeof(*icmp6h))) return -EINVAL; + br_vlan_get_tag(skb, &vid); icmp6h = icmp6_hdr(skb); num = ntohs(icmp6h->icmp6_dataun.un_data16[1]); len = sizeof(*icmp6h); @@ -990,7 +1006,8 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br, continue; } - err = br_ip6_multicast_add_group(br, port, &grec->grec_mca); + err = br_ip6_multicast_add_group(br, port, &grec->grec_mca, + vid); if (!err) break; } @@ -1074,6 +1091,7 @@ static int br_ip4_multicast_query(struct net_bridge *br, unsigned long now = jiffies; __be32 group; int err = 0; + u16 vid = 0; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || @@ -1108,7 +1126,8 @@ static int br_ip4_multicast_query(struct net_bridge *br, if (!group) goto out; - mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group); + br_vlan_get_tag(skb, &vid); + mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid); if (!mp) goto out; @@ -1149,6 +1168,7 @@ static int br_ip6_multicast_query(struct net_bridge *br, unsigned long now = jiffies; const struct in6_addr *group = NULL; int err = 0; + u16 vid = 0; spin_lock(&br->multicast_lock); if (!netif_running(br->dev) || @@ -1180,7 +1200,8 @@ static int br_ip6_multicast_query(struct net_bridge *br, if (!group) goto out; - mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group); + br_vlan_get_tag(skb, &vid); + mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid); if (!mp) goto out; @@ -1286,7 +1307,8 @@ out: static void br_ip4_multicast_leave_group(struct net_bridge *br, struct net_bridge_port *port, - __be32 group) + __be32 group, + __u16 vid) { struct br_ip br_group; @@ -1295,6 +1317,7 @@ static void br_ip4_multicast_leave_group(struct net_bridge *br, br_group.u.ip4 = group; br_group.proto = htons(ETH_P_IP); + br_group.vid = vid; br_multicast_leave_group(br, port, &br_group); } @@ -1302,7 +1325,8 @@ static void br_ip4_multicast_leave_group(struct net_bridge *br, #if IS_ENABLED(CONFIG_IPV6) static void br_ip6_multicast_leave_group(struct net_bridge *br, struct net_bridge_port *port, - const struct in6_addr *group) + const struct in6_addr *group, + __u16 vid) { struct br_ip br_group; @@ -1311,6 +1335,7 @@ static void br_ip6_multicast_leave_group(struct net_bridge *br, br_group.u.ip6 = *group; br_group.proto = htons(ETH_P_IPV6); + br_group.vid = vid; br_multicast_leave_group(br, port, &br_group); } @@ -1326,6 +1351,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br, unsigned int len; unsigned int offset; int err; + u16 vid = 0; /* We treat OOM as packet loss for now. */ if (!pskb_may_pull(skb, sizeof(*iph))) @@ -1386,6 +1412,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br, err = 0; + br_vlan_get_tag(skb2, &vid); BR_INPUT_SKB_CB(skb)->igmp = 1; ih = igmp_hdr(skb2); @@ -1393,7 +1420,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br, case IGMP_HOST_MEMBERSHIP_REPORT: case IGMPV2_HOST_MEMBERSHIP_REPORT: BR_INPUT_SKB_CB(skb)->mrouters_only = 1; - err = br_ip4_multicast_add_group(br, port, ih->group); + err = br_ip4_multicast_add_group(br, port, ih->group, vid); break; case IGMPV3_HOST_MEMBERSHIP_REPORT: err = br_ip4_multicast_igmp3_report(br, port, skb2); @@ -1402,7 +1429,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br, err = br_ip4_multicast_query(br, port, skb2); break; case IGMP_HOST_LEAVE_MESSAGE: - br_ip4_multicast_leave_group(br, port, ih->group); + br_ip4_multicast_leave_group(br, port, ih->group, vid); break; } @@ -1427,6 +1454,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, unsigned int len; int offset; int err; + u16 vid = 0; if (!pskb_may_pull(skb, sizeof(*ip6h))) return -EINVAL; @@ -1510,6 +1538,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, err = 0; + br_vlan_get_tag(skb, &vid); BR_INPUT_SKB_CB(skb)->igmp = 1; switch (icmp6_type) { @@ -1522,7 +1551,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, } mld = (struct mld_msg *)skb_transport_header(skb2); BR_INPUT_SKB_CB(skb)->mrouters_only = 1; - err = br_ip6_multicast_add_group(br, port, &mld->mld_mca); + err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid); break; } case ICMPV6_MLD2_REPORT: @@ -1539,7 +1568,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, goto out; } mld = (struct mld_msg *)skb_transport_header(skb2); - br_ip6_multicast_leave_group(br, port, &mld->mld_mca); + br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid); } } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index f4ae87b5aa6e..22915c8e9961 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -63,6 +63,7 @@ struct br_ip #endif } u; __be16 proto; + __u16 vid; }; struct net_port_vlans { -- cgit v1.2.3 From 1690be63a27b20ae65c792729a44f5970561ffa4 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:18 +0000 Subject: bridge: Add vlan support to static neighbors When a user adds bridge neighbors, allow him to specify VLAN id. If the VLAN id is not specified, the neighbor will be added for VLANs currently in the ports filter list. If no VLANs are configured on the port, we use vlan 0 and only add 1 entry. Signed-off-by: Vlad Yasevich Acked-by: Jitendra Kalsaria Signed-off-by: David S. Miller --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +- drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 1 + drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c | 4 +- drivers/net/macvlan.c | 2 +- drivers/net/vxlan.c | 3 +- include/linux/netdevice.h | 4 +- include/uapi/linux/neighbour.h | 1 + net/bridge/br_fdb.c | 148 ++++++++++++++++++++--- net/bridge/br_private.h | 6 +- net/core/rtnetlink.c | 26 ++-- 10 files changed, 162 insertions(+), 35 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 4e2aa47193cb..1c0efcb7920f 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -7002,7 +7002,7 @@ static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], return err; } -static int ixgbe_ndo_fdb_del(struct ndmsg *ndm, +static int ixgbe_ndo_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr) { diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 937bcc3d3212..5088dc5c3d1a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -1959,6 +1959,7 @@ static int mlx4_en_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], } static int mlx4_en_fdb_del(struct ndmsg *ndm, + struct nlattr *tb[], struct net_device *dev, const unsigned char *addr) { diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c index b745194391a1..b95316831587 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c @@ -247,8 +247,8 @@ static int qlcnic_set_mac(struct net_device *netdev, void *p) return 0; } -static int qlcnic_fdb_del(struct ndmsg *ndm, struct net_device *netdev, - const unsigned char *addr) +static int qlcnic_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *netdev, const unsigned char *addr) { struct qlcnic_adapter *adapter = netdev_priv(netdev); int err = -EOPNOTSUPP; diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index e4b8078e88a9..defcd8a85744 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -599,7 +599,7 @@ static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], return err; } -static int macvlan_fdb_del(struct ndmsg *ndm, +static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr) { diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 72485b9b9005..9d70421cf3a0 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -393,7 +393,8 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], } /* Delete entry (via netlink) */ -static int vxlan_fdb_delete(struct ndmsg *ndm, struct net_device *dev, +static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *dev, const unsigned char *addr) { struct vxlan_dev *vxlan = netdev_priv(dev); diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 1964ca66df56..9deb672d999f 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -884,7 +884,8 @@ struct netdev_fcoe_hbainfo { * struct net_device *dev, * const unsigned char *addr, u16 flags) * Adds an FDB entry to dev for addr. - * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev, + * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], + * struct net_device *dev, * const unsigned char *addr) * Deletes the FDB entry from dev coresponding to addr. * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, @@ -1008,6 +1009,7 @@ struct net_device_ops { const unsigned char *addr, u16 flags); int (*ndo_fdb_del)(struct ndmsg *ndm, + struct nlattr *tb[], struct net_device *dev, const unsigned char *addr); int (*ndo_fdb_dump)(struct sk_buff *skb, diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h index 275e5d65dcb2..adb068c53c4e 100644 --- a/include/uapi/linux/neighbour.h +++ b/include/uapi/linux/neighbour.h @@ -20,6 +20,7 @@ enum { NDA_LLADDR, NDA_CACHEINFO, NDA_PROBES, + NDA_VLAN, __NDA_MAX }; diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 276a52254606..4b75ad43aa85 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -505,6 +505,10 @@ static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, ci.ndm_refcnt = 0; if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) goto nla_put_failure; + + if (nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) + goto nla_put_failure; + return nlmsg_end(skb, nlh); nla_put_failure: @@ -516,6 +520,7 @@ static inline size_t fdb_nlmsg_size(void) { return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ + + nla_total_size(sizeof(u16)) /* NDA_VLAN */ + nla_total_size(sizeof(struct nda_cacheinfo)); } @@ -617,6 +622,25 @@ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, return 0; } +static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, + const unsigned char *addr, u16 nlh_flags, u16 vid) +{ + int err = 0; + + if (ndm->ndm_flags & NTF_USE) { + rcu_read_lock(); + br_fdb_update(p->br, p, addr, vid); + rcu_read_unlock(); + } else { + spin_lock_bh(&p->br->hash_lock); + err = fdb_add_entry(p, addr, ndm->ndm_state, + nlh_flags, vid); + spin_unlock_bh(&p->br->hash_lock); + } + + return err; +} + /* Add new permanent fdb entry with RTM_NEWNEIGH */ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, @@ -624,12 +648,29 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], { struct net_bridge_port *p; int err = 0; + struct net_port_vlans *pv; + unsigned short vid = VLAN_N_VID; if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); return -EINVAL; } + if (tb[NDA_VLAN]) { + if (nla_len(tb[NDA_VLAN]) != sizeof(unsigned short)) { + pr_info("bridge: RTM_NEWNEIGH with invalid vlan\n"); + return -EINVAL; + } + + vid = nla_get_u16(tb[NDA_VLAN]); + + if (vid >= VLAN_N_VID) { + pr_info("bridge: RTM_NEWNEIGH with invalid vlan id %d\n", + vid); + return -EINVAL; + } + } + p = br_port_get_rtnl(dev); if (p == NULL) { pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", @@ -637,41 +678,90 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], return -EINVAL; } - if (ndm->ndm_flags & NTF_USE) { - rcu_read_lock(); - br_fdb_update(p->br, p, addr, 0); - rcu_read_unlock(); + pv = nbp_get_vlan_info(p); + if (vid != VLAN_N_VID) { + if (!pv || !test_bit(vid, pv->vlan_bitmap)) { + pr_info("bridge: RTM_NEWNEIGH with unconfigured " + "vlan %d on port %s\n", vid, dev->name); + return -EINVAL; + } + + /* VID was specified, so use it. */ + err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); } else { - spin_lock_bh(&p->br->hash_lock); - err = fdb_add_entry(p, addr, ndm->ndm_state, nlh_flags, - 0); - spin_unlock_bh(&p->br->hash_lock); + if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) { + err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); + goto out; + } + + /* We have vlans configured on this port and user didn't + * specify a VLAN. To be nice, add/update entry for every + * vlan on this port. + */ + vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN); + while (vid < BR_VLAN_BITMAP_LEN) { + err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); + if (err) + goto out; + vid = find_next_bit(pv->vlan_bitmap, + BR_VLAN_BITMAP_LEN, vid+1); + } } +out: return err; } -static int fdb_delete_by_addr(struct net_bridge_port *p, const u8 *addr) +static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, + u16 vlan) { - struct net_bridge *br = p->br; - struct hlist_head *head = &br->hash[br_mac_hash(addr, 0)]; + struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; struct net_bridge_fdb_entry *fdb; - fdb = fdb_find(head, addr, 0); + fdb = fdb_find(head, addr, vlan); if (!fdb) return -ENOENT; - fdb_delete(p->br, fdb); + fdb_delete(br, fdb); return 0; } +static int __br_fdb_delete(struct net_bridge_port *p, + const unsigned char *addr, u16 vid) +{ + int err; + + spin_lock_bh(&p->br->hash_lock); + err = fdb_delete_by_addr(p->br, addr, vid); + spin_unlock_bh(&p->br->hash_lock); + + return err; +} + /* Remove neighbor entry with RTM_DELNEIGH */ -int br_fdb_delete(struct ndmsg *ndm, struct net_device *dev, +int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *dev, const unsigned char *addr) { struct net_bridge_port *p; int err; + struct net_port_vlans *pv; + unsigned short vid = VLAN_N_VID; + if (tb[NDA_VLAN]) { + if (nla_len(tb[NDA_VLAN]) != sizeof(unsigned short)) { + pr_info("bridge: RTM_NEWNEIGH with invalid vlan\n"); + return -EINVAL; + } + + vid = nla_get_u16(tb[NDA_VLAN]); + + if (vid >= VLAN_N_VID) { + pr_info("bridge: RTM_NEWNEIGH with invalid vlan id %d\n", + vid); + return -EINVAL; + } + } p = br_port_get_rtnl(dev); if (p == NULL) { pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", @@ -679,9 +769,33 @@ int br_fdb_delete(struct ndmsg *ndm, struct net_device *dev, return -EINVAL; } - spin_lock_bh(&p->br->hash_lock); - err = fdb_delete_by_addr(p, addr); - spin_unlock_bh(&p->br->hash_lock); + pv = nbp_get_vlan_info(p); + if (vid != VLAN_N_VID) { + if (!pv || !test_bit(vid, pv->vlan_bitmap)) { + pr_info("bridge: RTM_DELNEIGH with unconfigured " + "vlan %d on port %s\n", vid, dev->name); + return -EINVAL; + } + err = __br_fdb_delete(p, addr, vid); + } else { + if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) { + err = __br_fdb_delete(p, addr, 0); + goto out; + } + + /* We have vlans configured on this port and user didn't + * specify a VLAN. To be nice, add/update entry for every + * vlan on this port. + */ + err = -ENOENT; + vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN); + while (vid < BR_VLAN_BITMAP_LEN) { + err &= __br_fdb_delete(p, addr, vid); + vid = find_next_bit(pv->vlan_bitmap, + BR_VLAN_BITMAP_LEN, vid+1); + } + } +out: return err; } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 22915c8e9961..799dbb37e5a2 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -388,7 +388,7 @@ extern void br_fdb_update(struct net_bridge *br, const unsigned char *addr, u16 vid); -extern int br_fdb_delete(struct ndmsg *ndm, +extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr); extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], @@ -577,13 +577,13 @@ extern void nbp_vlan_flush(struct net_bridge_port *port); static inline struct net_port_vlans *br_get_vlan_info( const struct net_bridge *br) { - return rcu_dereference(br->vlan_info); + return rcu_dereference_rtnl(br->vlan_info); } static inline struct net_port_vlans *nbp_get_vlan_info( const struct net_bridge_port *p) { - return rcu_dereference(p->vlan_info); + return rcu_dereference_rtnl(p->vlan_info); } /* Since bridge now depends on 8021Q module, but the time bridge sees the diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index f3a112ec86d5..d8aa20f6a46e 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2119,13 +2119,17 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct net *net = sock_net(skb->sk); struct ndmsg *ndm; - struct nlattr *llattr; + struct nlattr *tb[NDA_MAX+1]; struct net_device *dev; int err = -EINVAL; __u8 *addr; - if (nlmsg_len(nlh) < sizeof(*ndm)) - return -EINVAL; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); + if (err < 0) + return err; ndm = nlmsg_data(nlh); if (ndm->ndm_ifindex == 0) { @@ -2139,13 +2143,17 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) return -ENODEV; } - llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR); - if (llattr == NULL || nla_len(llattr) != ETH_ALEN) { - pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n"); + if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { + pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); + return -EINVAL; + } + + addr = nla_data(tb[NDA_LLADDR]); + if (!is_valid_ether_addr(addr)) { + pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ether address\n"); return -EINVAL; } - addr = nla_data(llattr); err = -EOPNOTSUPP; /* Support fdb on master device the net/bridge default case */ @@ -2155,7 +2163,7 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) const struct net_device_ops *ops = br_dev->netdev_ops; if (ops->ndo_fdb_del) - err = ops->ndo_fdb_del(ndm, dev, addr); + err = ops->ndo_fdb_del(ndm, tb, dev, addr); if (err) goto out; @@ -2165,7 +2173,7 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) /* Embedded bridge, macvlan, and any other device support */ if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) { - err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr); + err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr); if (!err) { rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); -- cgit v1.2.3 From bc9a25d21ef8bad30e259af5114ccfb845c066db Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:19 +0000 Subject: bridge: Add vlan support for local fdb entries When VLAN is added to the port, a local fdb entry for that port (the entry with the mac address of the port) is added for that VLAN. This way we can correctly determine if the traffic is for the bridge itself. If the address of the port changes, we try to change all the local fdb entries we have for that port. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/bridge/br_fdb.c | 61 +++++++++++++++++++++++++++++---------- net/bridge/br_if.c | 2 +- net/bridge/br_private.h | 10 ++++++- net/bridge/br_vlan.c | 77 ++++++++++++++++++++++++++++++++++++++++++++----- 4 files changed, 125 insertions(+), 25 deletions(-) diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 4b75ad43aa85..8117900af4de 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -28,7 +28,7 @@ static struct kmem_cache *br_fdb_cache __read_mostly; static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, - const unsigned char *addr); + const unsigned char *addr, u16 vid); static void fdb_notify(struct net_bridge *br, const struct net_bridge_fdb_entry *, int); @@ -92,6 +92,7 @@ static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) { struct net_bridge *br = p->br; + bool no_vlan = (nbp_get_vlan_info(p) == NULL) ? true : false; int i; spin_lock_bh(&br->hash_lock); @@ -106,10 +107,12 @@ void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) if (f->dst == p && f->is_local) { /* maybe another port has same hw addr? */ struct net_bridge_port *op; + u16 vid = f->vlan_id; list_for_each_entry(op, &br->port_list, list) { if (op != p && ether_addr_equal(op->dev->dev_addr, - f->addr.addr)) { + f->addr.addr) && + nbp_vlan_find(op, vid)) { f->dst = op; goto insert; } @@ -117,27 +120,55 @@ void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) /* delete old one */ fdb_delete(br, f); - goto insert; +insert: + /* insert new address, may fail if invalid + * address or dup. + */ + fdb_insert(br, p, newaddr, vid); + + /* if this port has no vlan information + * configured, we can safely be done at + * this point. + */ + if (no_vlan) + goto done; } } } - insert: - /* insert new address, may fail if invalid address or dup. */ - fdb_insert(br, p, newaddr); +done: spin_unlock_bh(&br->hash_lock); } void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) { struct net_bridge_fdb_entry *f; + struct net_port_vlans *pv; + u16 vid = 0; /* If old entry was unassociated with any port, then delete it. */ f = __br_fdb_get(br, br->dev->dev_addr, 0); if (f && f->is_local && !f->dst) fdb_delete(br, f); - fdb_insert(br, NULL, newaddr); + fdb_insert(br, NULL, newaddr, 0); + + /* Now remove and add entries for every VLAN configured on the + * bridge. This function runs under RTNL so the bitmap will not + * change from under us. + */ + pv = br_get_vlan_info(br); + if (!pv) + return; + + for (vid = find_next_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN, vid); + vid < BR_VLAN_BITMAP_LEN; + vid = find_next_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN, vid+1)) { + f = __br_fdb_get(br, br->dev->dev_addr, vid); + if (f && f->is_local && !f->dst) + fdb_delete(br, f); + fdb_insert(br, NULL, newaddr, vid); + } } void br_fdb_cleanup(unsigned long _data) @@ -379,15 +410,15 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, } static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, - const unsigned char *addr) + const unsigned char *addr, u16 vid) { - struct hlist_head *head = &br->hash[br_mac_hash(addr, 0)]; + struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; struct net_bridge_fdb_entry *fdb; if (!is_valid_ether_addr(addr)) return -EINVAL; - fdb = fdb_find(head, addr, 0); + fdb = fdb_find(head, addr, vid); if (fdb) { /* it is okay to have multiple ports with same * address, just use the first one. @@ -400,7 +431,7 @@ static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, fdb_delete(br, fdb); } - fdb = fdb_create(head, source, addr, 0); + fdb = fdb_create(head, source, addr, vid); if (!fdb) return -ENOMEM; @@ -411,12 +442,12 @@ static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, /* Add entry for local address of interface */ int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, - const unsigned char *addr) + const unsigned char *addr, u16 vid) { int ret; spin_lock_bh(&br->hash_lock); - ret = fdb_insert(br, source, addr); + ret = fdb_insert(br, source, addr, vid); spin_unlock_bh(&br->hash_lock); return ret; } @@ -712,8 +743,8 @@ out: return err; } -static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, - u16 vlan) +int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, + u16 vlan) { struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; struct net_bridge_fdb_entry *fdb; diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index 335c60cebfd1..ef1b91431c6b 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -397,7 +397,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) dev_set_mtu(br->dev, br_min_mtu(br)); - if (br_fdb_insert(br, p, dev->dev_addr)) + if (br_fdb_insert(br, p, dev->dev_addr, 0)) netdev_err(dev, "failed insert local address bridge forwarding table\n"); kobject_uevent(&p->kobj, KOBJ_ADD); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 799dbb37e5a2..32ecfa4ef47f 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -382,11 +382,13 @@ extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, unsigned long off); extern int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, - const unsigned char *addr); + const unsigned char *addr, + u16 vid); extern void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, const unsigned char *addr, u16 vid); +extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, @@ -573,6 +575,7 @@ extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); extern void nbp_vlan_flush(struct net_bridge_port *port); +extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); static inline struct net_port_vlans *br_get_vlan_info( const struct net_bridge *br) @@ -676,6 +679,11 @@ static inline struct net_port_vlans *nbp_get_vlan_info( return NULL; } +static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) +{ + return false; +} + static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) { return 0; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index c79940cff3a1..9ea358fbbf78 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -25,6 +25,9 @@ static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid) static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) { + struct net_bridge_port *p = NULL; + struct net_bridge *br; + struct net_device *dev; int err; if (test_bit(vid, v->vlan_bitmap)) { @@ -33,19 +36,35 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) return 0; } - if (v->port_idx && vid) { - struct net_device *dev = v->parent.port->dev; + if (vid) { + if (v->port_idx) { + p = v->parent.port; + br = p->br; + dev = p->dev; + } else { + br = v->parent.br; + dev = br->dev; + } - /* Add VLAN to the device filter if it is supported. - * Stricly speaking, this is not necessary now, since devices - * are made promiscuous by the bridge, but if that ever changes - * this code will allow tagged traffic to enter the bridge. - */ - if (dev->features & NETIF_F_HW_VLAN_FILTER) { + if (p && (dev->features & NETIF_F_HW_VLAN_FILTER)) { + /* Add VLAN to the device filter if it is supported. + * Stricly speaking, this is not necessary now, since + * devices are made promiscuous by the bridge, but if + * that ever changes this code will allow tagged + * traffic to enter the bridge. + */ err = dev->netdev_ops->ndo_vlan_rx_add_vid(dev, vid); if (err) return err; } + + err = br_fdb_insert(br, p, dev->dev_addr, vid); + if (err) { + br_err(br, "failed insert local address into bridge " + "forwarding table\n"); + goto out_filt; + } + } set_bit(vid, v->vlan_bitmap); @@ -54,6 +73,11 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) __vlan_add_pvid(v, vid); return 0; + +out_filt: + if (p && (dev->features & NETIF_F_HW_VLAN_FILTER)) + dev->netdev_ops->ndo_vlan_rx_kill_vid(dev, vid); + return err; } static int __vlan_del(struct net_port_vlans *v, u16 vid) @@ -253,6 +277,15 @@ int br_vlan_delete(struct net_bridge *br, u16 vid) if (!pv) return -EINVAL; + if (vid) { + /* If the VID !=0 remove fdb for this vid. VID 0 is special + * in that it's the default and is always there in the fdb. + */ + spin_lock_bh(&br->hash_lock); + fdb_delete_by_addr(br, br->dev->dev_addr, vid); + spin_unlock_bh(&br->hash_lock); + } + __vlan_del(pv, vid); return 0; } @@ -329,6 +362,15 @@ int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) if (!pv) return -EINVAL; + if (vid) { + /* If the VID !=0 remove fdb for this vid. VID 0 is special + * in that it's the default and is always there in the fdb. + */ + spin_lock_bh(&port->br->hash_lock); + fdb_delete_by_addr(port->br, port->dev->dev_addr, vid); + spin_unlock_bh(&port->br->hash_lock); + } + return __vlan_del(pv, vid); } @@ -344,3 +386,22 @@ void nbp_vlan_flush(struct net_bridge_port *port) __vlan_flush(pv); } + +bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) +{ + struct net_port_vlans *pv; + bool found = false; + + rcu_read_lock(); + pv = rcu_dereference(port->vlan_info); + + if (!pv) + goto out; + + if (test_bit(vid, pv->vlan_bitmap)) + found = true; + +out: + rcu_read_unlock(); + return found; +} -- cgit v1.2.3 From 35e03f3a0275a1ba57e432d7c948cf6f70fbb37a Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Wed, 13 Feb 2013 12:00:20 +0000 Subject: bridge: Separate egress policy bitmap Add an ability to configure a separate "untagged" egress policy to the VLAN information of the bridge. This superseeds PVID policy and makes PVID ingress-only. The policy is configured with a new flag and is represented as a port bitmap per vlan. Egress frames with a VLAN id in "untagged" policy bitmap would egress the port without VLAN header. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- include/uapi/linux/if_bridge.h | 1 + net/bridge/br_netlink.c | 4 ++++ net/bridge/br_private.h | 1 + net/bridge/br_vlan.c | 20 ++++++++++++++------ 4 files changed, 20 insertions(+), 6 deletions(-) diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index c6c30e28f396..f1bf8d34ac9f 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -121,6 +121,7 @@ enum { #define BRIDGE_VLAN_INFO_MASTER (1<<0) /* Operate on Bridge device as well */ #define BRIDGE_VLAN_INFO_PVID (1<<1) /* VLAN is PVID, ingress untagged */ +#define BRIDGE_VLAN_INFO_UNTAGGED (1<<2) /* VLAN egresses untagged */ struct bridge_vlan_info { u16 flags; diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index e044cc0b5650..d1dda476d743 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -143,6 +143,10 @@ static int br_fill_ifinfo(struct sk_buff *skb, vinfo.flags = 0; if (vid == pvid) vinfo.flags |= BRIDGE_VLAN_INFO_PVID; + + if (test_bit(vid, pv->untagged_bitmap)) + vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; + if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo)) goto nla_put_failure; diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 32ecfa4ef47f..6d314c4e6bcb 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -75,6 +75,7 @@ struct net_port_vlans { } parent; struct rcu_head rcu; unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; + unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; u16 num_vlans; }; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 9ea358fbbf78..93dde75923f0 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -23,6 +23,15 @@ static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid) v->pvid = 0; } +static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags) +{ + if (flags & BRIDGE_VLAN_INFO_PVID) + __vlan_add_pvid(v, vid); + + if (flags & BRIDGE_VLAN_INFO_UNTAGGED) + set_bit(vid, v->untagged_bitmap); +} + static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) { struct net_bridge_port *p = NULL; @@ -31,8 +40,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) int err; if (test_bit(vid, v->vlan_bitmap)) { - if (flags & BRIDGE_VLAN_INFO_PVID) - __vlan_add_pvid(v, vid); + __vlan_add_flags(v, vid, flags); return 0; } @@ -69,8 +77,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) set_bit(vid, v->vlan_bitmap); v->num_vlans++; - if (flags & BRIDGE_VLAN_INFO_PVID) - __vlan_add_pvid(v, vid); + __vlan_add_flags(v, vid, flags); return 0; @@ -86,6 +93,7 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) return -EINVAL; __vlan_delete_pvid(v, vid); + clear_bit(vid, v->untagged_bitmap); if (v->port_idx && vid) { struct net_device *dev = v->parent.port->dev; @@ -144,11 +152,11 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br, goto out; /* At this point, we know that the frame was filtered and contains - * a valid vlan id. If the vlan id matches the pvid of current port + * a valid vlan id. If the vlan id is set in the untagged bitmap, * send untagged; otherwise, send taged. */ br_vlan_get_tag(skb, &vid); - if (vid == br_get_pvid(pv)) + if (test_bit(vid, pv->untagged_bitmap)) skb = br_vlan_untag(skb); else { /* Egress policy says "send tagged". If output device -- cgit v1.2.3