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-rw-r--r--net/bridge/br_device.c2
-rw-r--r--net/bridge/br_input.c2
-rw-r--r--net/bridge/br_netlink.c42
-rw-r--r--net/bridge/br_private.h44
-rw-r--r--net/bridge/br_vlan.c103
5 files changed, 75 insertions, 118 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index c915c5b408ea..bdfb9544ca03 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -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))
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index e27d0dfd2ee9..f5c5a4500e2f 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -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 */
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index bb8bb7b36f04..c64dcad11662 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -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 @@ initvars:
}
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 @@ nla_put_failure:
}
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 @@ initvars:
}
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 */
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index cfe945f5ab8b..4ed8308db66e 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -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)
-{
- if (!br)
- return 0;
-
- smp_rmb();
- return br->pvid;
-}
-
-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)
{
- if (!p)
+ if (!vg)
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;
}
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 678d5c41b551..90ac4b0c55c1 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -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 @@ out_filt:
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 @@ out:
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 @@ out:
}
/* 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 @@ drop:
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));
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.