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bridge: new function to pack vlans into ranges during gets

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This patch adds new function to pack vlans into ranges
whereever applicable using the flags BRIDGE_VLAN_INFO_RANGE_BEGIN
and BRIDGE VLAN_INFO_RANGE_END

Old vlan packing code is moved to a new function and continues to be
called when filter_mask is RTEXT_FILTER_BRVLAN.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2015-01-10 07:31:14 -08:00 committed by David S. Miller
parent 35a27cee32
commit 36cd0ffbab
1 changed files with 124 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

143
net/bridge/br_netlink.c
View File

@ -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))
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,