"struct devlink_dpipe_table_ops" only contains some function pointers.

Update "struct devlink_dpipe_table" and the 'table_ops' parameter of
devl_dpipe_table_register() so that structures in drivers can be
constified.

Constifying these structures will move some data to a read-only section, so
increase overall security.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 include/net/devlink.h | 4 ++--
 net/devlink/dpipe.c   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 35eb0f884386..db5eff6cb60f 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -352,7 +352,7 @@ struct devlink_dpipe_table {
 	bool resource_valid;
 	u64 resource_id;
 	u64 resource_units;
-	struct devlink_dpipe_table_ops *table_ops;
+	const struct devlink_dpipe_table_ops *table_ops;
 	struct rcu_head rcu;
 };
 
@@ -1751,7 +1751,7 @@ void devl_sb_unregister(struct devlink *devlink, unsigned int sb_index);
 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index);
 int devl_dpipe_table_register(struct devlink *devlink,
 			      const char *table_name,
-			      struct devlink_dpipe_table_ops *table_ops,
+			      const struct devlink_dpipe_table_ops *table_ops,
 			      void *priv, bool counter_control_extern);
 void devl_dpipe_table_unregister(struct devlink *devlink,
 				 const char *table_name);
diff --git a/net/devlink/dpipe.c b/net/devlink/dpipe.c
index a72a9292efc5..55009b377447 100644
--- a/net/devlink/dpipe.c
+++ b/net/devlink/dpipe.c
@@ -839,7 +839,7 @@ EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
  */
 int devl_dpipe_table_register(struct devlink *devlink,
 			      const char *table_name,
-			      struct devlink_dpipe_table_ops *table_ops,
+			      const struct devlink_dpipe_table_ops *table_ops,
 			      void *priv, bool counter_control_extern)
 {
 	struct devlink_dpipe_table *table;
-- 
2.45.1

On Sun, Jun 02, 2024 at 04:18:52PM +0200, Christophe JAILLET wrote:
> "struct devlink_dpipe_table_ops" only contains some function pointers.
> 
> Update "struct devlink_dpipe_table" and the 'table_ops' parameter of
> devl_dpipe_table_register() so that structures in drivers can be
> constified.
> 
> Constifying these structures will move some data to a read-only section, so
> increase overall security.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Reviewed-by: Ido Schimmel <idosch@nvidia.com>

On 02.06.2024 16:18, Christophe JAILLET wrote:
> "struct devlink_dpipe_table_ops" only contains some function pointers.
> 
> Update "struct devlink_dpipe_table" and the 'table_ops' parameter of
> devl_dpipe_table_register() so that structures in drivers can be
> constified.
> 
> Constifying these structures will move some data to a read-only section, so
> increase overall security.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---

Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>

>  include/net/devlink.h | 4 ++--
>  net/devlink/dpipe.c   | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/include/net/devlink.h b/include/net/devlink.h
> index 35eb0f884386..db5eff6cb60f 100644
> --- a/include/net/devlink.h
> +++ b/include/net/devlink.h
> @@ -352,7 +352,7 @@ struct devlink_dpipe_table {
>  	bool resource_valid;
>  	u64 resource_id;
>  	u64 resource_units;
> -	struct devlink_dpipe_table_ops *table_ops;
> +	const struct devlink_dpipe_table_ops *table_ops;
>  	struct rcu_head rcu;
>  };
>  
> @@ -1751,7 +1751,7 @@ void devl_sb_unregister(struct devlink *devlink, unsigned int sb_index);
>  void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index);
>  int devl_dpipe_table_register(struct devlink *devlink,
>  			      const char *table_name,
> -			      struct devlink_dpipe_table_ops *table_ops,
> +			      const struct devlink_dpipe_table_ops *table_ops,
>  			      void *priv, bool counter_control_extern);
>  void devl_dpipe_table_unregister(struct devlink *devlink,
>  				 const char *table_name);
> diff --git a/net/devlink/dpipe.c b/net/devlink/dpipe.c
> index a72a9292efc5..55009b377447 100644
> --- a/net/devlink/dpipe.c
> +++ b/net/devlink/dpipe.c
> @@ -839,7 +839,7 @@ EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
>   */
>  int devl_dpipe_table_register(struct devlink *devlink,
>  			      const char *table_name,
> -			      struct devlink_dpipe_table_ops *table_ops,
> +			      const struct devlink_dpipe_table_ops *table_ops,
>  			      void *priv, bool counter_control_extern)
>  {
>  	struct devlink_dpipe_table *table;