From 7a53e718c551752924416b33235bf338729b5115 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Fri, 24 Jan 2020 13:40:20 +0200 Subject: [PATCH] net: bridge: vlan: add basic option dumping support We'll be dumping the options for the whole range if they're equal. The first range vlan will be used to extract the options. The commit doesn't change anything yet it just adds the skeleton for the support. The dump will happen when the first option is added. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/bridge/Makefile | 2 +- net/bridge/br_private.h | 8 ++++++++ net/bridge/br_vlan.c | 20 ++++++++++++++------ net/bridge/br_vlan_options.c | 25 +++++++++++++++++++++++++ 4 files changed, 48 insertions(+), 7 deletions(-) create mode 100644 net/bridge/br_vlan_options.c diff --git a/net/bridge/Makefile b/net/bridge/Makefile index ac9ef33..49da7ae 100644 --- a/net/bridge/Makefile +++ b/net/bridge/Makefile @@ -20,7 +20,7 @@ obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o -bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o br_vlan_tunnel.o +bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o br_vlan_tunnel.o br_vlan_options.o bridge-$(CONFIG_NET_SWITCHDEV) += br_switchdev.o diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index a6226ff..403df71 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -1191,6 +1191,14 @@ static inline void br_vlan_notify(const struct net_bridge *br, } #endif +/* br_vlan_options.c */ +#ifdef CONFIG_BRIDGE_VLAN_FILTERING +bool br_vlan_opts_eq(const struct net_bridge_vlan *v1, + const struct net_bridge_vlan *v2); +bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); +size_t br_vlan_opts_nl_size(void); +#endif + struct nf_br_ops { int (*br_dev_xmit_hook)(struct sk_buff *skb); }; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index e4f7dd1..75ec3da 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -1547,7 +1547,9 @@ void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) } } +/* v_opts is used to dump the options which must be equal in the whole range */ static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, + const struct net_bridge_vlan *v_opts, u16 flags) { struct bridge_vlan_info info; @@ -1572,6 +1574,9 @@ static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) goto out_err; + if (v_opts && !br_vlan_opts_fill(skb, v_opts)) + goto out_err; + nla_nest_end(skb, nest); return true; @@ -1586,7 +1591,8 @@ static size_t rtnl_vlan_nlmsg_size(void) return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ - + nla_total_size(sizeof(struct bridge_vlan_info)); /* BRIDGE_VLANDB_ENTRY_INFO */ + + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ + + br_vlan_opts_nl_size(); /* bridge vlan options */ } void br_vlan_notify(const struct net_bridge *br, @@ -1595,7 +1601,7 @@ void br_vlan_notify(const struct net_bridge *br, int cmd) { struct net_bridge_vlan_group *vg; - struct net_bridge_vlan *v; + struct net_bridge_vlan *v = NULL; struct br_vlan_msg *bvm; struct nlmsghdr *nlh; struct sk_buff *skb; @@ -1647,7 +1653,7 @@ void br_vlan_notify(const struct net_bridge *br, goto out_kfree; } - if (!br_vlan_fill_vids(skb, vid, vid_range, flags)) + if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags)) goto out_err; nlmsg_end(skb, nlh); @@ -1665,7 +1671,8 @@ static bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, const struct net_bridge_vlan *range_end) { return v_curr->vid - range_end->vid == 1 && - range_end->flags == v_curr->flags; + range_end->flags == v_curr->flags && + br_vlan_opts_eq(v_curr, range_end); } static int br_vlan_dump_dev(const struct net_device *dev, @@ -1729,7 +1736,8 @@ static int br_vlan_dump_dev(const struct net_device *dev, u16 flags = br_vlan_flags(range_start, pvid); if (!br_vlan_fill_vids(skb, range_start->vid, - range_end->vid, flags)) { + range_end->vid, range_start, + flags)) { err = -EMSGSIZE; break; } @@ -1748,7 +1756,7 @@ static int br_vlan_dump_dev(const struct net_device *dev, */ if (!err && range_start && !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, - br_vlan_flags(range_start, pvid))) + range_start, br_vlan_flags(range_start, pvid))) err = -EMSGSIZE; cb->args[1] = err ? idx : 0; diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c new file mode 100644 index 0000000..55fcdc9 --- /dev/null +++ b/net/bridge/br_vlan_options.c @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (c) 2020, Nikolay Aleksandrov +#include +#include +#include +#include + +#include "br_private.h" + +/* check if the options between two vlans are equal */ +bool br_vlan_opts_eq(const struct net_bridge_vlan *v1, + const struct net_bridge_vlan *v2) +{ + return true; +} + +bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v) +{ + return true; +} + +size_t br_vlan_opts_nl_size(void) +{ + return 0; +} -- 2.7.4