bridge: Use the correct bit length for bitmap functions in the VLAN code

[ Upstream commit ef40b7ef181b7b1a24df2ef2d1ef84956bffa635 ]

The VLAN code needs to know the length of the per-port VLAN bitmap to
perform its most basic operations (retrieving VLAN informations, removing
VLANs, forwarding database manipulation, etc). Unfortunately, in the
current implementation we are using a macro that indicates the bitmap
size in longs in places where the size in bits is expected, which in
some cases can cause what appear to be random failures.
Use the correct macro.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index ebfa444..84dd783 100644 (file)
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -161,7 +161,7 @@ void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
        if (!pv)
                return;
 
-       for_each_set_bit_from(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+       for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) {
                f = __br_fdb_get(br, br->dev->dev_addr, vid);
                if (f && f->is_local && !f->dst)
                        fdb_delete(br, f);
@@ -725,7 +725,7 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                /* VID was specified, so use it. */
                err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
        } else {
-               if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
+               if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) {
                        err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
                        goto out;
                }
@@ -734,7 +734,7 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                 * specify a VLAN.  To be nice, add/update entry for every
                 * vlan on this port.
                 */
-               for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+               for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
                        err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
                        if (err)
                                goto out;
@@ -812,7 +812,7 @@ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 
                err = __br_fdb_delete(p, addr, vid);
        } else {
-               if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
+               if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) {
                        err = __br_fdb_delete(p, addr, 0);
                        goto out;
                }
@@ -822,7 +822,7 @@ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
                 * vlan on this port.
                 */
                err = -ENOENT;
-               for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+               for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
                        err &= __br_fdb_delete(p, addr, vid);
                }
        }

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 8e3abf5..f66a034 100644 (file)
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -128,7 +128,7 @@ static int br_fill_ifinfo(struct sk_buff *skb,
                else
                        pv = br_get_vlan_info(br);
 
-               if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN))
+               if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
                        goto done;
 
                af = nla_nest_start(skb, IFLA_AF_SPEC);
@@ -136,7 +136,7 @@ static int br_fill_ifinfo(struct sk_buff *skb,
                        goto nla_put_failure;
 
                pvid = br_get_pvid(pv);
-               for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+               for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
                        vinfo.vid = vid;
                        vinfo.flags = 0;
                        if (vid == pvid)

diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index bd58b45..9a9ffe7 100644 (file)
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -108,7 +108,7 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid)
 
        clear_bit(vid, v->vlan_bitmap);
        v->num_vlans--;
-       if (bitmap_empty(v->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
+       if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) {
                if (v->port_idx)
                        rcu_assign_pointer(v->parent.port->vlan_info, NULL);
                else
@@ -122,7 +122,7 @@ static void __vlan_flush(struct net_port_vlans *v)
 {
        smp_wmb();
        v->pvid = 0;
-       bitmap_zero(v->vlan_bitmap, BR_VLAN_BITMAP_LEN);
+       bitmap_zero(v->vlan_bitmap, VLAN_N_VID);
        if (v->port_idx)
                rcu_assign_pointer(v->parent.port->vlan_info, NULL);
        else