diff options
Diffstat (limited to 'net/bridge/br_vlan_options.c')
| -rw-r--r-- | net/bridge/br_vlan_options.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c index b4add9ea8964..4ef975b20185 100644 --- a/net/bridge/br_vlan_options.c +++ b/net/bridge/br_vlan_options.c @@ -258,3 +258,219 @@ int br_vlan_process_options(const struct net_bridge *br, return err; } + +bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, + const struct net_bridge_vlan *r_end) +{ + return v_curr->vid - r_end->vid == 1 && + ((v_curr->priv_flags ^ r_end->priv_flags) & + BR_VLFLAG_GLOBAL_MCAST_ENABLED) == 0; +} + +bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, + const struct net_bridge_vlan *v_opts) +{ + struct nlattr *nest; + + nest = nla_nest_start(skb, BRIDGE_VLANDB_GLOBAL_OPTIONS); + if (!nest) + return false; + + if (nla_put_u16(skb, BRIDGE_VLANDB_GOPTS_ID, vid)) + goto out_err; + + if (vid_range && vid < vid_range && + nla_put_u16(skb, BRIDGE_VLANDB_GOPTS_RANGE, vid_range)) + goto out_err; + +#ifdef CONFIG_BRIDGE_IGMP_SNOOPING + if (nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING, + !!(v_opts->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))) + goto out_err; +#endif + + nla_nest_end(skb, nest); + + return true; + +out_err: + nla_nest_cancel(skb, nest); + return false; +} + +static size_t rtnl_vlan_global_opts_nlmsg_size(void) +{ + return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) + + nla_total_size(0) /* BRIDGE_VLANDB_GLOBAL_OPTIONS */ + + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_GOPTS_ID */ +#ifdef CONFIG_BRIDGE_IGMP_SNOOPING + + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING */ +#endif + + nla_total_size(sizeof(u16)); /* BRIDGE_VLANDB_GOPTS_RANGE */ +} + +static void br_vlan_global_opts_notify(const struct net_bridge *br, + u16 vid, u16 vid_range) +{ + struct net_bridge_vlan *v; + struct br_vlan_msg *bvm; + struct nlmsghdr *nlh; + struct sk_buff *skb; + int err = -ENOBUFS; + + /* right now notifications are done only with rtnl held */ + ASSERT_RTNL(); + + skb = nlmsg_new(rtnl_vlan_global_opts_nlmsg_size(), GFP_KERNEL); + if (!skb) + goto out_err; + + err = -EMSGSIZE; + nlh = nlmsg_put(skb, 0, 0, RTM_NEWVLAN, sizeof(*bvm), 0); + if (!nlh) + goto out_err; + bvm = nlmsg_data(nlh); + memset(bvm, 0, sizeof(*bvm)); + bvm->family = AF_BRIDGE; + bvm->ifindex = br->dev->ifindex; + + /* need to find the vlan due to flags/options */ + v = br_vlan_find(br_vlan_group(br), vid); + if (!v) + goto out_kfree; + + if (!br_vlan_global_opts_fill(skb, vid, vid_range, v)) + goto out_err; + + nlmsg_end(skb, nlh); + rtnl_notify(skb, dev_net(br->dev), 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); + return; + +out_err: + rtnl_set_sk_err(dev_net(br->dev), RTNLGRP_BRVLAN, err); +out_kfree: + kfree_skb(skb); +} + +static int br_vlan_process_global_one_opts(const struct net_bridge *br, + struct net_bridge_vlan_group *vg, + struct net_bridge_vlan *v, + struct nlattr **tb, + bool *changed, + struct netlink_ext_ack *extack) +{ + *changed = false; +#ifdef CONFIG_BRIDGE_IGMP_SNOOPING + if (tb[BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING]) { + u8 mc_snooping; + + mc_snooping = nla_get_u8(tb[BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING]); + if (br_multicast_toggle_global_vlan(v, !!mc_snooping)) + *changed = true; + } +#endif + + return 0; +} + +static const struct nla_policy br_vlan_db_gpol[BRIDGE_VLANDB_GOPTS_MAX + 1] = { + [BRIDGE_VLANDB_GOPTS_ID] = { .type = NLA_U16 }, + [BRIDGE_VLANDB_GOPTS_RANGE] = { .type = NLA_U16 }, + [BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING] = { .type = NLA_U8 }, +}; + +int br_vlan_rtm_process_global_options(struct net_device *dev, + const struct nlattr *attr, + int cmd, + struct netlink_ext_ack *extack) +{ + struct net_bridge_vlan *v, *curr_start = NULL, *curr_end = NULL; + struct nlattr *tb[BRIDGE_VLANDB_GOPTS_MAX + 1]; + struct net_bridge_vlan_group *vg; + u16 vid, vid_range = 0; + struct net_bridge *br; + int err = 0; + + if (cmd != RTM_NEWVLAN) { + NL_SET_ERR_MSG_MOD(extack, "Global vlan options support only set operation"); + return -EINVAL; + } + if (!netif_is_bridge_master(dev)) { + NL_SET_ERR_MSG_MOD(extack, "Global vlan options can only be set on bridge device"); + return -EINVAL; + } + br = netdev_priv(dev); + vg = br_vlan_group(br); + if (WARN_ON(!vg)) + return -ENODEV; + + err = nla_parse_nested(tb, BRIDGE_VLANDB_GOPTS_MAX, attr, + br_vlan_db_gpol, extack); + if (err) + return err; + + if (!tb[BRIDGE_VLANDB_GOPTS_ID]) { + NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry id"); + return -EINVAL; + } + vid = nla_get_u16(tb[BRIDGE_VLANDB_GOPTS_ID]); + if (!br_vlan_valid_id(vid, extack)) + return -EINVAL; + + if (tb[BRIDGE_VLANDB_GOPTS_RANGE]) { + vid_range = nla_get_u16(tb[BRIDGE_VLANDB_GOPTS_RANGE]); + if (!br_vlan_valid_id(vid_range, extack)) + return -EINVAL; + if (vid >= vid_range) { + NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); + return -EINVAL; + } + } else { + vid_range = vid; + } + + for (; vid <= vid_range; vid++) { + bool changed = false; + + v = br_vlan_find(vg, vid); + if (!v) { + NL_SET_ERR_MSG_MOD(extack, "Vlan in range doesn't exist, can't process global options"); + err = -ENOENT; + break; + } + + err = br_vlan_process_global_one_opts(br, vg, v, tb, &changed, + extack); + if (err) + break; + + if (changed) { + /* vlan options changed, check for range */ + if (!curr_start) { + curr_start = v; + curr_end = v; + continue; + } + + if (!br_vlan_global_opts_can_enter_range(v, curr_end)) { + br_vlan_global_opts_notify(br, curr_start->vid, + curr_end->vid); + curr_start = v; + } + curr_end = v; + } else { + /* nothing changed and nothing to notify yet */ + if (!curr_start) + continue; + + br_vlan_global_opts_notify(br, curr_start->vid, + curr_end->vid); + curr_start = NULL; + curr_end = NULL; + } + } + if (curr_start) + br_vlan_global_opts_notify(br, curr_start->vid, curr_end->vid); + + return err; +} |