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net: bridge: vlan: add basic option setting support

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This patch adds support for option modification of single vlans and
ranges. It allows to only modify options, i.e. skip create/delete by
using the BRIDGE_VLAN_INFO_ONLY_OPTS flag. When working with a range
option changes we try to pack the notifications as much as possible.

v2: do full port (all vlans) notification only when creating/deleting
    vlans for compatibility, rework the range detection when changing
    options, add more verbose extack errors and check if a vlan should
    be used (br_vlan_should_use checks)

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov
2020-01-24 13:40:21 +02:00
committed by David S. Miller
parent 7a53e718c5
commit a5d29ae226
4 changed files with 130 additions and 7 deletions
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41
net/bridge/br_vlan.c
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@@ -1667,8 +1667,8 @@ out_kfree:
}
/* check if v_curr can enter a range ending in range_end */
static bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
const struct net_bridge_vlan *range_end)
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 &&
@@ -1824,11 +1824,11 @@ static int br_vlan_rtm_process_one(struct net_device *dev,
{
struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
bool changed = false, skip_processing = false;
struct net_bridge_vlan_group *vg;
struct net_bridge_port *p = NULL;
int err = 0, cmdmap = 0;
struct net_bridge *br;
bool changed = false;
if (netif_is_bridge_master(dev)) {
br = netdev_priv(dev);
@@ -1882,16 +1882,43 @@ static int br_vlan_rtm_process_one(struct net_device *dev,
switch (cmd) {
case RTM_NEWVLAN:
cmdmap = RTM_SETLINK;
skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS);
break;
case RTM_DELVLAN:
cmdmap = RTM_DELLINK;
break;
}
err = br_process_vlan_info(br, p, cmdmap, vinfo, &vinfo_last, &changed,
extack);
if (changed)
br_ifinfo_notify(cmdmap, br, p);
if (!skip_processing) {
struct bridge_vlan_info *tmp_last = vinfo_last;
/* br_process_vlan_info may overwrite vinfo_last */
err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last,
&changed, extack);
/* notify first if anything changed */
if (changed)
br_ifinfo_notify(cmdmap, br, p);
if (err)
return err;
}
/* deal with options */
if (cmd == RTM_NEWVLAN) {
struct net_bridge_vlan *range_start, *range_end;
if (vinfo_last) {
range_start = br_vlan_find(vg, vinfo_last->vid);
range_end = br_vlan_find(vg, vinfo->vid);
} else {
range_start = br_vlan_find(vg, vinfo->vid);
range_end = range_start;
}
err = br_vlan_process_options(br, p, range_start, range_end,
tb, extack);
}
return err;
}