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authorScott Feldman <sfeldma@gmail.com>2015-06-22 00:27:17 -0700
committerDavid S. Miller <davem@davemloft.net>2015-06-23 06:56:18 -0700
commit7d4f8d871ab15bd50a5771382ca2c9355b38d73c (patch)
treedc2b70efc634d14085fc8e2abe0050e7039dc7f7 /net
parent3e3a78b49508e58f798cf519876bbb9ca0f931af (diff)
switchdev; add VLAN support for port's bridge_getlink
One more missing piece of the puzzle. Add vlan dump support to switchdev port's bridge_getlink. iproute2 "bridge vlan show" cmd already knows how to show the vlans installed on the bridge and the device , but (until now) no one implemented the port vlan part of the netlink PF_BRIDGE:RTM_GETLINK msg. Before this patch, "bridge vlan show": $ bridge -c vlan show port vlan ids sw1p1 30-34 << bridge side vlans 57 sw1p1 << device side vlans (missing) sw1p2 57 sw1p2 sw1p3 sw1p4 br0 None (When the port is bridged, the output repeats the vlan list for the vlans on the bridge side of the port and the vlans on the device side of the port. The listing above show no vlans for the device side even though they are installed). After this patch: $ bridge -c vlan show port vlan ids sw1p1 30-34 << bridge side vlan 57 sw1p1 30-34 << device side vlans 57 3840 PVID sw1p2 57 sw1p2 57 3840 PVID sw1p3 3842 PVID sw1p4 3843 PVID br0 None I re-used ndo_dflt_bridge_getlink to add vlan fill call-back func. switchdev support adds an obj dump for VLAN objects, using the same call-back scheme as FDB dump. Support included for both compressed and un-compressed vlan dumps. Signed-off-by: Scott Feldman <sfeldma@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/rtnetlink.c18
-rw-r--r--net/switchdev/switchdev.c123
2 files changed, 137 insertions, 4 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 2d102ce1474f..01ced4a889e0 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2908,7 +2908,11 @@ static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
struct net_device *dev, u16 mode,
- u32 flags, u32 mask, int nlflags)
+ u32 flags, u32 mask, int nlflags,
+ u32 filter_mask,
+ int (*vlan_fill)(struct sk_buff *skb,
+ struct net_device *dev,
+ u32 filter_mask))
{
struct nlmsghdr *nlh;
struct ifinfomsg *ifm;
@@ -2916,6 +2920,7 @@ int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
struct nlattr *protinfo;
u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
struct net_device *br_dev = netdev_master_upper_dev_get(dev);
+ int err = 0;
nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
if (nlh == NULL)
@@ -2956,6 +2961,13 @@ int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
goto nla_put_failure;
}
}
+ if (vlan_fill) {
+ err = vlan_fill(skb, dev, filter_mask);
+ if (err) {
+ nla_nest_cancel(skb, br_afspec);
+ goto nla_put_failure;
+ }
+ }
nla_nest_end(skb, br_afspec);
protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
@@ -2989,9 +3001,9 @@ int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
return 0;
nla_put_failure:
nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
+ return err ? err : -EMSGSIZE;
}
-EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
+EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
{
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 448d9199cea2..3e4b35a0c8cb 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -391,6 +391,126 @@ int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
}
EXPORT_SYMBOL_GPL(call_switchdev_notifiers);
+struct switchdev_vlan_dump {
+ struct switchdev_obj obj;
+ struct sk_buff *skb;
+ u32 filter_mask;
+ u16 flags;
+ u16 begin;
+ u16 end;
+};
+
+static int switchdev_port_vlan_dump_put(struct net_device *dev,
+ struct switchdev_vlan_dump *dump)
+{
+ struct bridge_vlan_info vinfo;
+
+ vinfo.flags = dump->flags;
+
+ if (dump->begin == 0 && dump->end == 0) {
+ return 0;
+ } else if (dump->begin == dump->end) {
+ vinfo.vid = dump->begin;
+ if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ return -EMSGSIZE;
+ } else {
+ vinfo.vid = dump->begin;
+ vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
+ if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ return -EMSGSIZE;
+ vinfo.vid = dump->end;
+ vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
+ vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
+ if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ return -EMSGSIZE;
+ }
+
+ return 0;
+}
+
+static int switchdev_port_vlan_dump_cb(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_vlan_dump *dump =
+ container_of(obj, struct switchdev_vlan_dump, obj);
+ struct switchdev_obj_vlan *vlan = &dump->obj.u.vlan;
+ int err = 0;
+
+ if (vlan->vid_begin > vlan->vid_end)
+ return -EINVAL;
+
+ if (dump->filter_mask & RTEXT_FILTER_BRVLAN) {
+ dump->flags = vlan->flags;
+ for (dump->begin = dump->end = vlan->vid_begin;
+ dump->begin <= vlan->vid_end;
+ dump->begin++, dump->end++) {
+ err = switchdev_port_vlan_dump_put(dev, dump);
+ if (err)
+ return err;
+ }
+ } else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) {
+ if (dump->begin > vlan->vid_begin &&
+ dump->begin >= vlan->vid_end) {
+ if ((dump->begin - 1) == vlan->vid_end &&
+ dump->flags == vlan->flags) {
+ /* prepend */
+ dump->begin = vlan->vid_begin;
+ } else {
+ err = switchdev_port_vlan_dump_put(dev, dump);
+ dump->flags = vlan->flags;
+ dump->begin = vlan->vid_begin;
+ dump->end = vlan->vid_end;
+ }
+ } else if (dump->end <= vlan->vid_begin &&
+ dump->end < vlan->vid_end) {
+ if ((dump->end + 1) == vlan->vid_begin &&
+ dump->flags == vlan->flags) {
+ /* append */
+ dump->end = vlan->vid_end;
+ } else {
+ err = switchdev_port_vlan_dump_put(dev, dump);
+ dump->flags = vlan->flags;
+ dump->begin = vlan->vid_begin;
+ dump->end = vlan->vid_end;
+ }
+ } else {
+ err = -EINVAL;
+ }
+ }
+
+ return err;
+}
+
+static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev,
+ u32 filter_mask)
+{
+ struct switchdev_vlan_dump dump = {
+ .obj = {
+ .id = SWITCHDEV_OBJ_PORT_VLAN,
+ .cb = switchdev_port_vlan_dump_cb,
+ },
+ .skb = skb,
+ .filter_mask = filter_mask,
+ };
+ int err = 0;
+
+ if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
+ (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
+ err = switchdev_port_obj_dump(dev, &dump.obj);
+ if (err)
+ goto err_out;
+ if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
+ /* last one */
+ err = switchdev_port_vlan_dump_put(dev, &dump);
+ }
+
+err_out:
+ return err == -EOPNOTSUPP ? 0 : err;
+}
+
/**
* switchdev_port_bridge_getlink - Get bridge port attributes
*
@@ -415,7 +535,8 @@ int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
return err;
return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode,
- attr.u.brport_flags, mask, nlflags);
+ attr.u.brport_flags, mask, nlflags,
+ filter_mask, switchdev_port_vlan_fill);
}
EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink);