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net: dsa: hide dp->bridge_dev and dp->bridge_num in the core behind helpers

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The location of the bridge device pointer and number is going to change.
It is not going to be kept individually per port, but in a common
structure allocated dynamically and which will have lockdep validation.

Create helpers to access these elements so that we have a migration path
to the new organization.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vladimir Oltean 2021-12-06 18:57:52 +02:00 committed by Jakub Kicinski
parent 65144067d3
commit 36cbf39b56
9 changed files with 62 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
include/net/dsa.h
View File

@ -599,6 +599,27 @@ struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp)
return dp->slave;
}
static inline struct net_device *
dsa_port_bridge_dev_get(const struct dsa_port *dp)
{
return dp->bridge_dev;
}
static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp)
{
return dp->bridge_num;
}
static inline bool dsa_port_bridge_same(const struct dsa_port *a,
const struct dsa_port *b)
{
struct net_device *br_a = dsa_port_bridge_dev_get(a);
struct net_device *br_b = dsa_port_bridge_dev_get(b);
/* Standalone ports are not in the same bridge with one another */
return (!br_a || !br_b) ? false : (br_a == br_b);
}
typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
bool is_static, void *data);
struct dsa_switch_ops {

4
net/dsa/dsa_priv.h
View File

@ -278,7 +278,7 @@ static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
/* DSA ports connected to a bridge, and event was emitted
* for the bridge.
*/
return dp->bridge_dev == bridge_dev;
return dsa_port_bridge_dev_get(dp) == bridge_dev;
}
/* Returns true if any port of this tree offloads the given net_device */
@ -345,7 +345,7 @@ dsa_slave_to_master(const struct net_device *dev)
static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb)
{
struct dsa_port *dp = dsa_slave_to_port(skb->dev);
struct net_device *br = dp->bridge_dev;
struct net_device *br = dsa_port_bridge_dev_get(dp);
struct net_device *dev = skb->dev;
struct net_device *upper_dev;
u16 vid, pvid, proto;

35
net/dsa/port.c
View File

@ -221,7 +221,7 @@ static int dsa_port_switchdev_sync_attrs(struct dsa_port *dp,
struct netlink_ext_ack *extack)
{
struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
struct net_device *br = dp->bridge_dev;
struct net_device *br = dsa_port_bridge_dev_get(dp);
int err;
err = dsa_port_inherit_brport_flags(dp, extack);
@ -372,7 +372,7 @@ int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
goto out_rollback;
tx_fwd_offload = dsa_port_bridge_tx_fwd_offload(dp, br,
dp->bridge_num);
dsa_port_bridge_num_get(dp));
err = switchdev_bridge_port_offload(brport_dev, dev, dp,
&dsa_slave_switchdev_notifier,
@ -415,13 +415,13 @@ void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br)
void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
{
unsigned int bridge_num = dsa_port_bridge_num_get(dp);
struct dsa_notifier_bridge_info info = {
.tree_index = dp->ds->dst->index,
.sw_index = dp->ds->index,
.port = dp->index,
.br = br,
};
int bridge_num = dp->bridge_num;
int err;
/* Here the port is already unbridged. Reflect the current configuration
@ -507,12 +507,15 @@ err_lag_join:
void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag)
{
if (dp->bridge_dev)
dsa_port_pre_bridge_leave(dp, dp->bridge_dev);
struct net_device *br = dsa_port_bridge_dev_get(dp);
if (br)
dsa_port_pre_bridge_leave(dp, br);
}
void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
{
struct net_device *br = dsa_port_bridge_dev_get(dp);
struct dsa_notifier_lag_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
@ -526,8 +529,8 @@ void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
/* Port might have been part of a LAG that in turn was
* attached to a bridge.
*/
if (dp->bridge_dev)
dsa_port_bridge_leave(dp, dp->bridge_dev);
if (br)
dsa_port_bridge_leave(dp, br);
dp->lag_tx_enabled = false;
dp->lag_dev = NULL;
@ -556,8 +559,8 @@ static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
* as long as we have 8021q uppers.
*/
if (vlan_filtering && dsa_port_is_user(dp)) {
struct net_device *br = dsa_port_bridge_dev_get(dp);
struct net_device *upper_dev, *slave = dp->slave;
struct net_device *br = dp->bridge_dev;
struct list_head *iter;
netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
@ -591,17 +594,15 @@ static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
* different setting than what is being requested.
*/
dsa_switch_for_each_port(other_dp, ds) {
struct net_device *other_bridge;
struct net_device *other_br = dsa_port_bridge_dev_get(other_dp);
other_bridge = other_dp->bridge_dev;
if (!other_bridge)
continue;
/* If it's the same bridge, it also has same
* vlan_filtering setting => no need to check
*/
if (other_bridge == dp->bridge_dev)
if (!other_br || other_br == dsa_port_bridge_dev_get(dp))
continue;
if (br_vlan_enabled(other_bridge) != vlan_filtering) {
if (br_vlan_enabled(other_br) != vlan_filtering) {
NL_SET_ERR_MSG_MOD(extack,
"VLAN filtering is a global setting");
return false;
@ -685,13 +686,13 @@ restore:
*/
bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
{
struct net_device *br = dsa_port_bridge_dev_get(dp);
struct dsa_switch *ds = dp->ds;
if (!dp->bridge_dev)
if (!br)
return false;
return (!ds->configure_vlan_while_not_filtering &&
!br_vlan_enabled(dp->bridge_dev));
return !ds->configure_vlan_while_not_filtering && !br_vlan_enabled(br);
}
int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)

13
net/dsa/slave.c
View File

@ -363,7 +363,7 @@ static int dsa_slave_vlan_add(struct net_device *dev,
/* Deny adding a bridge VLAN when there is already an 802.1Q upper with
* the same VID.
*/
if (br_vlan_enabled(dp->bridge_dev)) {
if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
rcu_read_lock();
err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
rcu_read_unlock();
@ -1580,7 +1580,7 @@ static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
if (other_dp->type != DSA_PORT_TYPE_USER)
continue;
if (other_dp->bridge_dev != dp->bridge_dev)
if (!dsa_port_bridge_same(dp, other_dp))
continue;
if (!other_dp->ds->mtu_enforcement_ingress)
@ -2220,7 +2220,7 @@ dsa_prevent_bridging_8021q_upper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct netlink_ext_ack *ext_ack;
struct net_device *slave;
struct net_device *slave, *br;
struct dsa_port *dp;
ext_ack = netdev_notifier_info_to_extack(&info->info);
@ -2233,11 +2233,12 @@ dsa_prevent_bridging_8021q_upper(struct net_device *dev,
return NOTIFY_DONE;
dp = dsa_slave_to_port(slave);
if (!dp->bridge_dev)
br = dsa_port_bridge_dev_get(dp);
if (!br)
return NOTIFY_DONE;
/* Deny enslaving a VLAN device into a VLAN-aware bridge */
if (br_vlan_enabled(dp->bridge_dev) &&
if (br_vlan_enabled(br) &&
netif_is_bridge_master(info->upper_dev) && info->linking) {
NL_SET_ERR_MSG_MOD(ext_ack,
"Cannot enslave VLAN device into VLAN aware bridge");
@ -2252,7 +2253,7 @@ dsa_slave_check_8021q_upper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct net_device *br = dp->bridge_dev;
struct net_device *br = dsa_port_bridge_dev_get(dp);
struct bridge_vlan_info br_info;
struct netlink_ext_ack *extack;
int err = NOTIFY_DONE;

6
net/dsa/switch.c
View File

@ -151,11 +151,9 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
*/
if (change_vlan_filtering && ds->vlan_filtering_is_global) {
dsa_switch_for_each_port(dp, ds) {
struct net_device *bridge_dev;
struct net_device *br = dsa_port_bridge_dev_get(dp);
bridge_dev = dp->bridge_dev;
if (bridge_dev && br_vlan_enabled(bridge_dev)) {
if (br && br_vlan_enabled(br)) {
change_vlan_filtering = false;
break;
}

2
net/dsa/tag_8021q.c
View File

@ -337,7 +337,7 @@ dsa_port_tag_8021q_bridge_match(struct dsa_port *dp,
return false;
if (dsa_port_is_user(dp))
return dp->bridge_dev == info->br;
return dsa_port_bridge_dev_get(dp) == info->br;
return false;
}

5
net/dsa/tag_dsa.c
View File

@ -132,6 +132,7 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev,
u8 *dsa_header;
if (skb->offload_fwd_mark) {
unsigned int bridge_num = dsa_port_bridge_num_get(dp);
struct dsa_switch_tree *dst = dp->ds->dst;
cmd = DSA_CMD_FORWARD;
@ -140,7 +141,7 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev,
* packets on behalf of a virtual switch device with an index
* past the physical switches.
*/
tag_dev = dst->last_switch + dp->bridge_num;
tag_dev = dst->last_switch + bridge_num;
tag_port = 0;
} else {
cmd = DSA_CMD_FROM_CPU;
@ -165,7 +166,7 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev,
dsa_header[2] &= ~0x10;
}
} else {
struct net_device *br = dp->bridge_dev;
struct net_device *br = dsa_port_bridge_dev_get(dp);
u16 vid;
vid = br ? MV88E6XXX_VID_BRIDGED : MV88E6XXX_VID_STANDALONE;

2
net/dsa/tag_ocelot.c
View File

@ -12,7 +12,7 @@
static void ocelot_xmit_get_vlan_info(struct sk_buff *skb, struct dsa_port *dp,
u64 *vlan_tci, u64 *tag_type)
{
struct net_device *br = READ_ONCE(dp->bridge_dev);
struct net_device *br = dsa_port_bridge_dev_get(dp);
struct vlan_ethhdr *hdr;
u16 proto, tci;

11
net/dsa/tag_sja1105.c
View File

@ -159,14 +159,16 @@ static u16 sja1105_xmit_tpid(struct dsa_port *dp)
* need to find it.
*/
dsa_switch_for_each_port(other_dp, ds) {
if (!other_dp->bridge_dev)
struct net_device *br = dsa_port_bridge_dev_get(other_dp);
if (!br)
continue;
/* Error is returned only if CONFIG_BRIDGE_VLAN_FILTERING,
* which seems pointless to handle, as our port cannot become
* VLAN-aware in that case.
*/
br_vlan_get_proto(other_dp->bridge_dev, &proto);
br_vlan_get_proto(br, &proto);
return proto;
}
@ -180,7 +182,8 @@ static struct sk_buff *sja1105_imprecise_xmit(struct sk_buff *skb,
struct net_device *netdev)
{
struct dsa_port *dp = dsa_slave_to_port(netdev);
struct net_device *br = dp->bridge_dev;
unsigned int bridge_num = dsa_port_bridge_num_get(dp);
struct net_device *br = dsa_port_bridge_dev_get(dp);
u16 tx_vid;
/* If the port is under a VLAN-aware bridge, just slide the
@ -196,7 +199,7 @@ static struct sk_buff *sja1105_imprecise_xmit(struct sk_buff *skb,
* TX VLAN that targets the bridge's entire broadcast domain,
* instead of just the specific port.
*/
tx_vid = dsa_8021q_bridge_tx_fwd_offload_vid(dp->bridge_num);
tx_vid = dsa_8021q_bridge_tx_fwd_offload_vid(bridge_num);
return dsa_8021q_xmit(skb, netdev, sja1105_xmit_tpid(dp), tx_vid);
}