diff mbox series

[v5,net-next,08/15] net: bridge: mst: Add helper to check if MST is enabled

Message ID 20220316150857.2442916-9-tobias@waldekranz.com (mailing list archive)
State Accepted
Commit 48d57b2e5f439246c4e12ed7705a5e3241294b03
Delegated to: Netdev Maintainers
Headers show
Series net: bridge: Multiple Spanning Trees | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 16 this patch: 16
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 19 this patch: 19
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 21 this patch: 21
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 33 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Tobias Waldekranz March 16, 2022, 3:08 p.m. UTC
This is useful for switchdev drivers that might want to refuse to join
a bridge where MST is enabled, if the hardware can't support it.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
---
 include/linux/if_bridge.h | 6 ++++++
 net/bridge/br_mst.c       | 9 +++++++++
 2 files changed, 15 insertions(+)

Comments

Vladimir Oltean March 17, 2022, 12:42 a.m. UTC | #1
On Wed, Mar 16, 2022 at 04:08:50PM +0100, Tobias Waldekranz wrote:
> This is useful for switchdev drivers that might want to refuse to join
> a bridge where MST is enabled, if the hardware can't support it.
> 
> Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
> ---

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

>  include/linux/if_bridge.h | 6 ++++++
>  net/bridge/br_mst.c       | 9 +++++++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
> index 1cf0cc46d90d..4efd5540279a 100644
> --- a/include/linux/if_bridge.h
> +++ b/include/linux/if_bridge.h
> @@ -119,6 +119,7 @@ int br_vlan_get_info(const struct net_device *dev, u16 vid,
>  		     struct bridge_vlan_info *p_vinfo);
>  int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
>  			 struct bridge_vlan_info *p_vinfo);
> +bool br_mst_enabled(const struct net_device *dev);
>  int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids);
>  #else
>  static inline bool br_vlan_enabled(const struct net_device *dev)
> @@ -153,6 +154,11 @@ static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
>  	return -EINVAL;
>  }
>  
> +static inline bool br_mst_enabled(const struct net_device *dev)
> +{
> +	return false;
> +}
> +
>  static inline int br_mst_get_info(const struct net_device *dev, u16 msti,
>  				  unsigned long *vids)
>  {
> diff --git a/net/bridge/br_mst.c b/net/bridge/br_mst.c
> index 00b36e629224..830a5746479f 100644
> --- a/net/bridge/br_mst.c
> +++ b/net/bridge/br_mst.c
> @@ -13,6 +13,15 @@
>  
>  DEFINE_STATIC_KEY_FALSE(br_mst_used);
>  
> +bool br_mst_enabled(const struct net_device *dev)
> +{
> +	if (!netif_is_bridge_master(dev))
> +		return false;
> +
> +	return br_opt_get(netdev_priv(dev), BROPT_MST_ENABLED);
> +}
> +EXPORT_SYMBOL_GPL(br_mst_enabled);
> +
>  int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids)
>  {
>  	const struct net_bridge_vlan_group *vg;
> -- 
> 2.25.1
>
Nikolay Aleksandrov March 17, 2022, 9:01 a.m. UTC | #2
On 16/03/2022 17:08, Tobias Waldekranz wrote:
> This is useful for switchdev drivers that might want to refuse to join
> a bridge where MST is enabled, if the hardware can't support it.
> 
> Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
> ---
>  include/linux/if_bridge.h | 6 ++++++
>  net/bridge/br_mst.c       | 9 +++++++++
>  2 files changed, 15 insertions(+)
> 

Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
diff mbox series

Patch

diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index 1cf0cc46d90d..4efd5540279a 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -119,6 +119,7 @@  int br_vlan_get_info(const struct net_device *dev, u16 vid,
 		     struct bridge_vlan_info *p_vinfo);
 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
 			 struct bridge_vlan_info *p_vinfo);
+bool br_mst_enabled(const struct net_device *dev);
 int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids);
 #else
 static inline bool br_vlan_enabled(const struct net_device *dev)
@@ -153,6 +154,11 @@  static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
 	return -EINVAL;
 }
 
+static inline bool br_mst_enabled(const struct net_device *dev)
+{
+	return false;
+}
+
 static inline int br_mst_get_info(const struct net_device *dev, u16 msti,
 				  unsigned long *vids)
 {
diff --git a/net/bridge/br_mst.c b/net/bridge/br_mst.c
index 00b36e629224..830a5746479f 100644
--- a/net/bridge/br_mst.c
+++ b/net/bridge/br_mst.c
@@ -13,6 +13,15 @@ 
 
 DEFINE_STATIC_KEY_FALSE(br_mst_used);
 
+bool br_mst_enabled(const struct net_device *dev)
+{
+	if (!netif_is_bridge_master(dev))
+		return false;
+
+	return br_opt_get(netdev_priv(dev), BROPT_MST_ENABLED);
+}
+EXPORT_SYMBOL_GPL(br_mst_enabled);
+
 int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids)
 {
 	const struct net_bridge_vlan_group *vg;