diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index b03ee8f62d3c..eaaea6208b42 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -125,6 +125,8 @@ 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 */ +#define BRIDGE_VLAN_INFO_RANGE_BEGIN (1<<3) /* VLAN is start of vlan range */ +#define BRIDGE_VLAN_INFO_RANGE_END (1<<4) /* VLAN is end of vlan range */ struct bridge_vlan_info { __u16 flags; diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h index d81f22d5b390..a1d18593f41e 100644 --- a/include/uapi/linux/rtnetlink.h +++ b/include/uapi/linux/rtnetlink.h @@ -636,6 +636,7 @@ struct tcamsg { /* New extended info filters for IFLA_EXT_MASK */ #define RTEXT_FILTER_VF (1 << 0) #define RTEXT_FILTER_BRVLAN (1 << 1) +#define RTEXT_FILTER_BRVLAN_COMPRESSED (1 << 2) /* End of information exported to user level */ diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 9f5eb55a4d3a..0b03879488c4 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -67,6 +67,118 @@ static int br_port_fill_attrs(struct sk_buff *skb, return 0; } +static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start, + u16 vid_end, u16 flags) +{ + struct bridge_vlan_info vinfo; + + if ((vid_end - vid_start) > 0) { + /* add range to skb */ + vinfo.vid = vid_start; + vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN; + if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, + sizeof(vinfo), &vinfo)) + goto nla_put_failure; + + vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; + + vinfo.vid = vid_end; + vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END; + if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, + sizeof(vinfo), &vinfo)) + goto nla_put_failure; + } else { + vinfo.vid = vid_start; + vinfo.flags = flags; + if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, + sizeof(vinfo), &vinfo)) + goto nla_put_failure; + } + + return 0; + +nla_put_failure: + return -EMSGSIZE; +} + +static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb, + const struct net_port_vlans *pv) +{ + u16 vid_range_start = 0, vid_range_end = 0; + u16 vid_range_flags; + u16 pvid, vid, flags; + int err = 0; + + /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan + * and mark vlan info with begin and end flags + * if vlaninfo represents a range + */ + pvid = br_get_pvid(pv); + for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { + flags = 0; + if (vid == pvid) + flags |= BRIDGE_VLAN_INFO_PVID; + + if (test_bit(vid, pv->untagged_bitmap)) + flags |= BRIDGE_VLAN_INFO_UNTAGGED; + + if (vid_range_start == 0) { + goto initvars; + } else if ((vid - vid_range_end) == 1 && + flags == vid_range_flags) { + vid_range_end = vid; + continue; + } else { + err = br_fill_ifvlaninfo_range(skb, vid_range_start, + vid_range_end, + vid_range_flags); + if (err) + return err; + } + +initvars: + vid_range_start = vid; + vid_range_end = vid; + vid_range_flags = flags; + } + + /* Call it once more to send any left over vlans */ + err = br_fill_ifvlaninfo_range(skb, vid_range_start, + vid_range_end, + vid_range_flags); + if (err) + return err; + + return 0; +} + +static int br_fill_ifvlaninfo(struct sk_buff *skb, + const struct net_port_vlans *pv) +{ + struct bridge_vlan_info vinfo; + u16 pvid, vid; + + pvid = br_get_pvid(pv); + for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { + vinfo.vid = vid; + 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; + } + + return 0; + +nla_put_failure: + return -EMSGSIZE; +} + /* * Create one netlink message for one interface * Contains port and master info as well as carrier and bridge state. @@ -121,12 +233,11 @@ static int br_fill_ifinfo(struct sk_buff *skb, } /* Check if the VID information is requested */ - if (filter_mask & RTEXT_FILTER_BRVLAN) { - struct nlattr *af; + if ((filter_mask & RTEXT_FILTER_BRVLAN) || + (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { const struct net_port_vlans *pv; - struct bridge_vlan_info vinfo; - u16 vid; - u16 pvid; + struct nlattr *af; + int err; if (port) pv = nbp_get_vlan_info(port); @@ -140,21 +251,12 @@ static int br_fill_ifinfo(struct sk_buff *skb, if (!af) goto nla_put_failure; - pvid = br_get_pvid(pv); - for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { - vinfo.vid = vid; - 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; - } - + if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) + err = br_fill_ifvlaninfo_compressed(skb, pv); + else + err = br_fill_ifvlaninfo(skb, pv); + if (err) + goto nla_put_failure; nla_nest_end(skb, af); } @@ -209,7 +311,8 @@ int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, int err = 0; struct net_bridge_port *port = br_port_get_rtnl(dev); - if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN)) + if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) && + !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) goto out; err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI, @@ -218,57 +321,89 @@ out: return err; } -static 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_vlan_info(struct net_bridge *br, struct net_bridge_port *p, + int cmd, struct bridge_vlan_info *vinfo) +{ + int err = 0; + + switch (cmd) { + case RTM_SETLINK: + if (p) { + 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, + vinfo->flags); + } else { + err = br_vlan_add(br, vinfo->vid, vinfo->flags); + } + 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 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]; + struct bridge_vlan_info *vinfo_start = NULL; + struct bridge_vlan_info *vinfo = NULL; + struct nlattr *attr; int err = 0; + int rem; - 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 || vinfo->vid >= VLAN_VID_MASK) + nla_for_each_nested(attr, af_spec, rem) { + if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) + continue; + if (nla_len(attr) != sizeof(struct bridge_vlan_info)) return -EINVAL; + vinfo = nla_data(attr); + if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { + if (vinfo_start) + return -EINVAL; + vinfo_start = vinfo; + continue; + } - switch (cmd) { - case RTM_SETLINK: - if (p) { - err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); + if (vinfo_start) { + struct bridge_vlan_info tmp_vinfo; + int v; + + if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END)) + return -EINVAL; + + if (vinfo->vid <= vinfo_start->vid) + return -EINVAL; + + memcpy(&tmp_vinfo, vinfo_start, + sizeof(struct bridge_vlan_info)); + + for (v = vinfo_start->vid; v <= vinfo->vid; v++) { + tmp_vinfo.vid = v; + err = br_vlan_info(br, p, cmd, &tmp_vinfo); if (err) break; - - if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) - err = br_vlan_add(p->br, vinfo->vid, - vinfo->flags); - } else - err = br_vlan_add(br, vinfo->vid, vinfo->flags); - - 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; + } + vinfo_start = NULL; + } else { + err = br_vlan_info(br, p, cmd, vinfo); } + if (err) + break; } return err;