[PATCH net-next] net: bridge: add a br_set_state helper function

[PATCH net-next] net: bridge: add a br_set_state helper function

[Florian Fainelli]

In preparation for being able to propagate port states to e.g: notifiers
or other kernel parts, do not manipulate the port state directly, but
instead use a helper function which will allow us to do a bit more than
just setting the state.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 net/bridge/br_if.c        |  2 +-
 net/bridge/br_netlink.c   |  2 +-
 net/bridge/br_private.h   |  1 +
 net/bridge/br_stp.c       | 15 ++++++++++-----
 net/bridge/br_stp_if.c    |  4 ++--
 net/bridge/br_stp_timer.c |  4 ++--
 6 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index a9f54a9b6690..7b7289ca2992 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -332,7 +332,7 @@ static struct net_bridge_port *new_nbp(struct net_bridge *br,
 	p->port_no = index;
 	p->flags = BR_LEARNING | BR_FLOOD;
 	br_init_port(p);
-	p->state = BR_STATE_DISABLED;
+	br_set_state(p, BR_STATE_DISABLED);
 	br_stp_port_timer_init(p);
 	br_multicast_add_port(p);
 
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 0fa66b83685f..2ff9706647f2 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -301,7 +301,7 @@ static int br_set_port_state(struct net_bridge_port *p, u8 state)
 	    (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
 		return -ENETDOWN;
 
-	p->state = state;
+	br_set_state(p, state);
 	br_log_state(p);
 	br_port_state_selection(p->br);
 	return 0;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index f53592fc3ef9..fe7463c2af9a 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -766,6 +766,7 @@ static inline void br_nf_core_fini(void) {}
 
 /* br_stp.c */
 void br_log_state(const struct net_bridge_port *p);
+void br_set_state(struct net_bridge_port *p, unsigned int state);
 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
 void br_init_port(struct net_bridge_port *p);
 void br_become_designated_port(struct net_bridge_port *p);
diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index 3c86f0538cbb..2b047bcf42a4 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -36,6 +36,11 @@ void br_log_state(const struct net_bridge_port *p)
 		br_port_state_names[p->state]);
 }
 
+void br_set_state(struct net_bridge_port *p, unsigned int state)
+{
+	p->state = state;
+}
+
 /* called under bridge lock */
 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no)
 {
@@ -107,7 +112,7 @@ static void br_root_port_block(const struct net_bridge *br,
 	br_notice(br, "port %u(%s) tried to become root port (blocked)",
 		  (unsigned int) p->port_no, p->dev->name);
 
-	p->state = BR_STATE_LISTENING;
+	br_set_state(p, BR_STATE_LISTENING);
 	br_log_state(p);
 	br_ifinfo_notify(RTM_NEWLINK, p);
 
@@ -387,7 +392,7 @@ static void br_make_blocking(struct net_bridge_port *p)
 		    p->state == BR_STATE_LEARNING)
 			br_topology_change_detection(p->br);
 
-		p->state = BR_STATE_BLOCKING;
+		br_set_state(p, BR_STATE_BLOCKING);
 		br_log_state(p);
 		br_ifinfo_notify(RTM_NEWLINK, p);
 
@@ -404,13 +409,13 @@ static void br_make_forwarding(struct net_bridge_port *p)
 		return;
 
 	if (br->stp_enabled == BR_NO_STP || br->forward_delay == 0) {
-		p->state = BR_STATE_FORWARDING;
+		br_set_state(p, BR_STATE_FORWARDING);
 		br_topology_change_detection(br);
 		del_timer(&p->forward_delay_timer);
 	} else if (br->stp_enabled == BR_KERNEL_STP)
-		p->state = BR_STATE_LISTENING;
+		br_set_state(p, BR_STATE_LISTENING);
 	else
-		p->state = BR_STATE_LEARNING;
+		br_set_state(p, BR_STATE_LEARNING);
 
 	br_multicast_enable_port(p);
 	br_log_state(p);
diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
index 189ba1e7d851..41146872c1b4 100644
--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -37,7 +37,7 @@ void br_init_port(struct net_bridge_port *p)
 {
 	p->port_id = br_make_port_id(p->priority, p->port_no);
 	br_become_designated_port(p);
-	p->state = BR_STATE_BLOCKING;
+	br_set_state(p, BR_STATE_BLOCKING);
 	p->topology_change_ack = 0;
 	p->config_pending = 0;
 }
@@ -100,7 +100,7 @@ void br_stp_disable_port(struct net_bridge_port *p)
 
 	wasroot = br_is_root_bridge(br);
 	br_become_designated_port(p);
-	p->state = BR_STATE_DISABLED;
+	br_set_state(p, BR_STATE_DISABLED);
 	p->topology_change_ack = 0;
 	p->config_pending = 0;
 
diff --git a/net/bridge/br_stp_timer.c b/net/bridge/br_stp_timer.c
index 558c46d19e05..4fcaa67750fd 100644
--- a/net/bridge/br_stp_timer.c
+++ b/net/bridge/br_stp_timer.c
@@ -87,11 +87,11 @@ static void br_forward_delay_timer_expired(unsigned long arg)
 		 (unsigned int) p->port_no, p->dev->name);
 	spin_lock(&br->lock);
 	if (p->state == BR_STATE_LISTENING) {
-		p->state = BR_STATE_LEARNING;
+		br_set_state(p, BR_STATE_LEARNING);
 		mod_timer(&p->forward_delay_timer,
 			  jiffies + br->forward_delay);
 	} else if (p->state == BR_STATE_LEARNING) {
-		p->state = BR_STATE_FORWARDING;
+		br_set_state(p, BR_STATE_FORWARDING);
 		if (br_is_designated_for_some_port(br))
 			br_topology_change_detection(br);
 		netif_carrier_on(br->dev);
-- 
1.9.1

Re: [PATCH net-next] net: bridge: add a br_set_state helper function

[David Miller]

From: Florian Fainelli <f.fainelli@gmail.com>
Date: Tue, 30 Sep 2014 16:13:19 -0700

> In preparation for being able to propagate port states to e.g: notifiers
> or other kernel parts, do not manipulate the port state directly, but
> instead use a helper function which will allow us to do a bit more than
> just setting the state.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

This looks fine to me, applied, thanks Florian.