bridge: vlan: move pvid inside net_bridge_vlan_group

One obvious way to converge more code (which was also used by the
previous vlan code) is to move pvid inside net_bridge_vlan_group. This
allows us to simplify some and remove other port-specific functions.
Also gives us the ability to simply pass the vlan group and use all of the
contained information.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2015-09-30 20:16:53 +02:00 committed by David S. Miller
parent 468e794458
commit 77751ee8ae
5 changed files with 75 additions and 118 deletions

View File

@ -56,7 +56,7 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
skb_reset_mac_header(skb);
skb_pull(skb, ETH_HLEN);
if (!br_allowed_ingress(br, skb, &vid))
if (!br_allowed_ingress(br, br_vlan_group(br), skb, &vid))
goto out;
if (is_broadcast_ether_addr(dest))

View File

@ -140,7 +140,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
if (!p || p->state == BR_STATE_DISABLED)
goto drop;
if (!nbp_allowed_ingress(p, skb, &vid))
if (!br_allowed_ingress(p->br, nbp_vlan_group(p), skb, &vid))
goto out;
/* insert into forwarding database after filtering to avoid spoofing */

View File

@ -22,17 +22,17 @@
#include "br_private_stp.h"
static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
u32 filter_mask,
u16 pvid)
u32 filter_mask)
{
struct net_bridge_vlan *v;
u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
u16 flags;
u16 flags, pvid;
int num_vlans = 0;
if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
return 0;
pvid = br_get_pvid(vg);
/* Count number of vlan infos */
list_for_each_entry(v, &vg->vlan_list, vlist) {
flags = 0;
@ -74,7 +74,7 @@ static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
}
static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
u32 filter_mask, u16 pvid)
u32 filter_mask)
{
if (!vg)
return 0;
@ -82,7 +82,7 @@ static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
if (filter_mask & RTEXT_FILTER_BRVLAN)
return vg->num_vlans;
return __get_num_vlan_infos(vg, filter_mask, pvid);
return __get_num_vlan_infos(vg, filter_mask);
}
static size_t br_get_link_af_size_filtered(const struct net_device *dev,
@ -92,19 +92,16 @@ static size_t br_get_link_af_size_filtered(const struct net_device *dev,
struct net_bridge_port *p;
struct net_bridge *br;
int num_vlan_infos;
u16 pvid = 0;
rcu_read_lock();
if (br_port_exists(dev)) {
p = br_port_get_rcu(dev);
vg = nbp_vlan_group(p);
pvid = nbp_get_pvid(p);
} else if (dev->priv_flags & IFF_EBRIDGE) {
br = netdev_priv(dev);
vg = br_vlan_group(br);
pvid = br_get_pvid(br);
}
num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask, pvid);
num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
rcu_read_unlock();
/* Each VLAN is returned in bridge_vlan_info along with flags */
@ -196,18 +193,18 @@ static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
}
static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
struct net_bridge_vlan_group *vg,
u16 pvid)
struct net_bridge_vlan_group *vg)
{
struct net_bridge_vlan *v;
u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
u16 flags;
u16 flags, pvid;
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(vg);
list_for_each_entry(v, &vg->vlan_list, vlist) {
flags = 0;
if (!br_vlan_should_use(v))
@ -251,12 +248,13 @@ static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
}
static int br_fill_ifvlaninfo(struct sk_buff *skb,
struct net_bridge_vlan_group *vg,
u16 pvid)
struct net_bridge_vlan_group *vg)
{
struct bridge_vlan_info vinfo;
struct net_bridge_vlan *v;
u16 pvid;
pvid = br_get_pvid(vg);
list_for_each_entry(v, &vg->vlan_list, vlist) {
if (!br_vlan_should_use(v))
continue;
@ -338,16 +336,12 @@ static int br_fill_ifinfo(struct sk_buff *skb,
(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
struct net_bridge_vlan_group *vg;
struct nlattr *af;
u16 pvid;
int err;
if (port) {
if (port)
vg = nbp_vlan_group(port);
pvid = nbp_get_pvid(port);
} else {
else
vg = br_vlan_group(br);
pvid = br_get_pvid(br);
}
if (!vg || !vg->num_vlans)
goto done;
@ -357,9 +351,9 @@ static int br_fill_ifinfo(struct sk_buff *skb,
goto nla_put_failure;
if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
err = br_fill_ifvlaninfo_compressed(skb, vg, pvid);
err = br_fill_ifvlaninfo_compressed(skb, vg);
else
err = br_fill_ifvlaninfo(skb, vg, pvid);
err = br_fill_ifvlaninfo(skb, vg);
if (err)
goto nla_put_failure;
nla_nest_end(skb, af);
@ -884,11 +878,11 @@ static size_t br_get_link_af_size(const struct net_device *dev)
if (br_port_exists(dev)) {
p = br_port_get_rtnl(dev);
num_vlans = br_get_num_vlan_infos(nbp_vlan_group(p),
RTEXT_FILTER_BRVLAN, 0);
RTEXT_FILTER_BRVLAN);
} else if (dev->priv_flags & IFF_EBRIDGE) {
br = netdev_priv(dev);
num_vlans = br_get_num_vlan_infos(br_vlan_group(br),
RTEXT_FILTER_BRVLAN, 0);
RTEXT_FILTER_BRVLAN);
}
/* Each VLAN is returned in bridge_vlan_info along with flags */

View File

@ -119,6 +119,7 @@ struct net_bridge_vlan {
* @vlan_hash: VLAN entry rhashtable
* @vlan_list: sorted VLAN entry list
* @num_vlans: number of total VLAN entries
* @pvid: PVID VLAN id
*
* IMPORTANT: Be careful when checking if there're VLAN entries using list
* primitives because the bridge can have entries in its list which
@ -130,6 +131,7 @@ struct net_bridge_vlan_group {
struct rhashtable vlan_hash;
struct list_head vlan_list;
u16 num_vlans;
u16 pvid;
};
struct net_bridge_fdb_entry
@ -228,7 +230,6 @@ struct net_bridge_port
#endif
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
struct net_bridge_vlan_group *vlgrp;
u16 pvid;
#endif
};
@ -340,7 +341,6 @@ struct net_bridge
u8 vlan_enabled;
__be16 vlan_proto;
u16 default_pvid;
u16 pvid;
#endif
};
@ -670,10 +670,10 @@ static inline void br_mdb_uninit(void)
/* br_vlan.c */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
bool br_allowed_ingress(struct net_bridge *br, struct sk_buff *skb, u16 *vid);
bool nbp_allowed_ingress(struct net_bridge_port *p, struct sk_buff *skb,
u16 *vid);
bool br_allowed_egress(struct net_bridge_vlan_group *br,
bool br_allowed_ingress(const struct net_bridge *br,
struct net_bridge_vlan_group *vg, struct sk_buff *skb,
u16 *vid);
bool br_allowed_egress(struct net_bridge_vlan_group *vg,
const struct sk_buff *skb);
bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
struct sk_buff *br_handle_vlan(struct net_bridge *br,
@ -725,22 +725,13 @@ static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
return err;
}
static inline u16 br_get_pvid(const struct net_bridge *br)
static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
{
if (!br)
if (!vg)
return 0;
smp_rmb();
return br->pvid;
}
static inline u16 nbp_get_pvid(const struct net_bridge_port *p)
{
if (!p)
return 0;
smp_rmb();
return p->pvid;
return vg->pvid;
}
static inline int br_vlan_enabled(struct net_bridge *br)
@ -748,20 +739,14 @@ static inline int br_vlan_enabled(struct net_bridge *br)
return br->vlan_enabled;
}
#else
static inline bool br_allowed_ingress(struct net_bridge *br,
static inline bool br_allowed_ingress(const struct net_bridge *br,
struct net_bridge_vlan_group *vg,
struct sk_buff *skb,
u16 *vid)
{
return true;
}
static inline bool nbp_allowed_ingress(struct net_bridge_port *p,
struct sk_buff *skb,
u16 *vid)
{
return true;
}
static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
const struct sk_buff *skb)
{
@ -834,12 +819,7 @@ static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
return 0;
}
static inline u16 br_get_pvid(const struct net_bridge *br)
{
return 0;
}
static inline u16 nbp_get_pvid(const struct net_bridge_port *p)
static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
{
return 0;
}

View File

@ -31,37 +31,37 @@ static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
}
static void __vlan_add_pvid(u16 *pvid, u16 vid)
static void __vlan_add_pvid(struct net_bridge_vlan_group *vg, u16 vid)
{
if (*pvid == vid)
if (vg->pvid == vid)
return;
smp_wmb();
*pvid = vid;
vg->pvid = vid;
}
static void __vlan_delete_pvid(u16 *pvid, u16 vid)
static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
{
if (*pvid != vid)
if (vg->pvid != vid)
return;
smp_wmb();
*pvid = 0;
vg->pvid = 0;
}
static void __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
{
if (flags & BRIDGE_VLAN_INFO_PVID) {
if (br_vlan_is_master(v))
__vlan_add_pvid(&v->br->pvid, v->vid);
else
__vlan_add_pvid(&v->port->pvid, v->vid);
} else {
if (br_vlan_is_master(v))
__vlan_delete_pvid(&v->br->pvid, v->vid);
else
__vlan_delete_pvid(&v->port->pvid, v->vid);
}
struct net_bridge_vlan_group *vg;
if (br_vlan_is_master(v))
vg = v->br->vlgrp;
else
vg = v->port->vlgrp;
if (flags & BRIDGE_VLAN_INFO_PVID)
__vlan_add_pvid(vg, v->vid);
else
__vlan_delete_pvid(vg, v->vid);
if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
@ -249,25 +249,22 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags)
static int __vlan_del(struct net_bridge_vlan *v)
{
struct net_bridge_vlan *masterv = v;
struct net_bridge_vlan_group *vg;
struct net_bridge_port *p = NULL;
struct net_bridge *br;
int err = 0;
struct rhashtable *tbl;
u16 *pvid;
if (br_vlan_is_master(v)) {
br = v->br;
tbl = &v->br->vlgrp->vlan_hash;
pvid = &v->br->pvid;
vg = v->br->vlgrp;
} else {
p = v->port;
br = p->br;
tbl = &p->vlgrp->vlan_hash;
vg = v->port->vlgrp;
masterv = v->brvlan;
pvid = &p->pvid;
}
__vlan_delete_pvid(pvid, v->vid);
__vlan_delete_pvid(vg, v->vid);
if (p) {
err = __vlan_vid_del(p->dev, p->br, v->vid);
if (err)
@ -284,7 +281,8 @@ static int __vlan_del(struct net_bridge_vlan *v)
}
if (masterv != v) {
rhashtable_remove_fast(tbl, &v->vnode, br_vlan_rht_params);
rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
br_vlan_rht_params);
__vlan_del_list(v);
kfree_rcu(v, rcu);
}
@ -299,11 +297,11 @@ static int __vlan_del(struct net_bridge_vlan *v)
return err;
}
static void __vlan_flush(struct net_bridge_vlan_group *vlgrp, u16 *pvid)
static void __vlan_flush(struct net_bridge_vlan_group *vlgrp)
{
struct net_bridge_vlan *vlan, *tmp;
__vlan_delete_pvid(pvid, *pvid);
__vlan_delete_pvid(vlgrp, vlgrp->pvid);
list_for_each_entry_safe(vlan, tmp, &vlgrp->vlan_list, vlist)
__vlan_del(vlan);
rhashtable_destroy(&vlgrp->vlan_hash);
@ -348,7 +346,7 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br,
}
/* Called under RCU */
static bool __allowed_ingress(struct rhashtable *tbl, u16 pvid, __be16 proto,
static bool __allowed_ingress(struct net_bridge_vlan_group *vg, __be16 proto,
struct sk_buff *skb, u16 *vid)
{
const struct net_bridge_vlan *v;
@ -389,6 +387,8 @@ static bool __allowed_ingress(struct rhashtable *tbl, u16 pvid, __be16 proto,
}
if (!*vid) {
u16 pvid = br_get_pvid(vg);
/* Frame had a tag with VID 0 or did not have a tag.
* See if pvid is set on this port. That tells us which
* vlan untagged or priority-tagged traffic belongs to.
@ -415,7 +415,7 @@ static bool __allowed_ingress(struct rhashtable *tbl, u16 pvid, __be16 proto,
}
/* Frame had a valid vlan tag. See if vlan is allowed */
v = br_vlan_lookup(tbl, *vid);
v = br_vlan_find(vg, *vid);
if (v && br_vlan_should_use(v))
return true;
drop:
@ -423,7 +423,9 @@ static bool __allowed_ingress(struct rhashtable *tbl, u16 pvid, __be16 proto,
return false;
}
bool br_allowed_ingress(struct net_bridge *br, struct sk_buff *skb, u16 *vid)
bool br_allowed_ingress(const struct net_bridge *br,
struct net_bridge_vlan_group *vg, struct sk_buff *skb,
u16 *vid)
{
/* If VLAN filtering is disabled on the bridge, all packets are
* permitted.
@ -433,25 +435,7 @@ bool br_allowed_ingress(struct net_bridge *br, struct sk_buff *skb, u16 *vid)
return true;
}
return __allowed_ingress(&br->vlgrp->vlan_hash, br->pvid,
br->vlan_proto, skb, vid);
}
bool nbp_allowed_ingress(struct net_bridge_port *p, struct sk_buff *skb,
u16 *vid)
{
struct net_bridge *br = p->br;
/* If VLAN filtering is disabled on the bridge, all packets are
* permitted.
*/
if (!br->vlan_enabled) {
BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
return true;
}
return __allowed_ingress(&p->vlgrp->vlan_hash, p->pvid, br->vlan_proto,
skb, vid);
return __allowed_ingress(vg, br->vlan_proto, skb, vid);
}
/* Called under RCU. */
@ -491,14 +475,14 @@ bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
*vid = 0;
if (!*vid) {
*vid = nbp_get_pvid(p);
*vid = br_get_pvid(vg);
if (!*vid)
return false;
return true;
}
if (br_vlan_find(p->vlgrp, *vid))
if (br_vlan_find(vg, *vid))
return true;
return false;
@ -574,7 +558,7 @@ void br_vlan_flush(struct net_bridge *br)
{
ASSERT_RTNL();
__vlan_flush(br_vlan_group(br), &br->pvid);
__vlan_flush(br_vlan_group(br));
}
struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
@ -695,12 +679,11 @@ int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
return err;
}
static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 pvid,
u16 vid)
static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
{
struct net_bridge_vlan *v;
if (vid != pvid)
if (vid != vg->pvid)
return false;
v = br_vlan_lookup(&vg->vlan_hash, vid);
@ -719,11 +702,11 @@ static void br_vlan_disable_default_pvid(struct net_bridge *br)
/* Disable default_pvid on all ports where it is still
* configured.
*/
if (vlan_default_pvid(br->vlgrp, br->pvid, pvid))
if (vlan_default_pvid(br->vlgrp, pvid))
br_vlan_delete(br, pvid);
list_for_each_entry(p, &br->port_list, list) {
if (vlan_default_pvid(p->vlgrp, p->pvid, pvid))
if (vlan_default_pvid(p->vlgrp, pvid))
nbp_vlan_delete(p, pvid);
}
@ -749,7 +732,7 @@ static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid)
* user configuration.
*/
pvent = br_vlan_find(br->vlgrp, pvid);
if ((!old_pvid || vlan_default_pvid(br->vlgrp, br->pvid, old_pvid)) &&
if ((!old_pvid || vlan_default_pvid(br->vlgrp, old_pvid)) &&
(!pvent || !br_vlan_should_use(pvent))) {
err = br_vlan_add(br, pvid,
BRIDGE_VLAN_INFO_PVID |
@ -766,7 +749,7 @@ static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid)
* user configuration.
*/
if ((old_pvid &&
!vlan_default_pvid(p->vlgrp, p->pvid, old_pvid)) ||
!vlan_default_pvid(p->vlgrp, old_pvid)) ||
br_vlan_find(p->vlgrp, pvid))
continue;
@ -955,5 +938,5 @@ void nbp_vlan_flush(struct net_bridge_port *port)
list_for_each_entry(vlan, &port->vlgrp->vlan_list, vlist)
vlan_vid_del(port->dev, port->br->vlan_proto, vlan->vid);
__vlan_flush(nbp_vlan_group(port), &port->pvid);
__vlan_flush(nbp_vlan_group(port));
}