[PATCH net-next v4 2/9] net: devlink: region: Pass the region ops to the snapshot function

[Andrew Lunn]

Pass the region to be snapshotted to the function performing the
snapshot. This allows one function to operate on numerous regions.

v4:
Add missing kerneldoc for ICE

Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
 drivers/net/ethernet/intel/ice/ice_devlink.c | 4 ++++
 drivers/net/netdevsim/dev.c                  | 6 ++++--
 include/net/devlink.h                        | 4 +++-
 net/core/devlink.c                           | 2 +-
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c 
b/drivers/net/ethernet/intel/ice/ice_devlink.c
index 111d6bfe4222..67d1190cb164 100644
--- a/drivers/net/ethernet/intel/ice/ice_devlink.c
+++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
@@ -401,6 +401,7 @@ void ice_devlink_destroy_port(struct ice_pf *pf)
 /**
  * ice_devlink_nvm_snapshot - Capture a snapshot of the Shadow RAM contents
  * @devlink: the devlink instance
+ * @ops: the devlink region being snapshotted
  * @extack: extended ACK response structure
  * @data: on exit points to snapshot data buffer
  *
@@ -413,6 +414,7 @@ void ice_devlink_destroy_port(struct ice_pf *pf)
  * error code on failure.
  */
 static int ice_devlink_nvm_snapshot(struct devlink *devlink,
+                                   const struct devlink_region_ops *ops,
                                    struct netlink_ext_ack *extack, u8 **data)
 {
        struct ice_pf *pf = devlink_priv(devlink);
@@ -456,6 +458,7 @@ static int ice_devlink_nvm_snapshot(struct devlink *devlink,
 /**
  * ice_devlink_devcaps_snapshot - Capture snapshot of device capabilities
  * @devlink: the devlink instance
+ * @ops: the devlink region being snapshotted
  * @extack: extended ACK response structure
  * @data: on exit points to snapshot data buffer
  *
@@ -468,6 +471,7 @@ static int ice_devlink_nvm_snapshot(struct devlink *devlink,
  */
 static int
 ice_devlink_devcaps_snapshot(struct devlink *devlink,
+                            const struct devlink_region_ops *ops,
                             struct netlink_ext_ack *extack, u8 **data)
 {
        struct ice_pf *pf = devlink_priv(devlink);
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 32f339fedb21..cf763ec69bb7 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -40,7 +40,9 @@ static struct dentry *nsim_dev_ddir;
 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
 
 static int
-nsim_dev_take_snapshot(struct devlink *devlink, struct netlink_ext_ack *extack,
+nsim_dev_take_snapshot(struct devlink *devlink,
+                      const struct devlink_region_ops *ops,
+                      struct netlink_ext_ack *extack,
                       u8 **data)
 {
        void *dummy_data;
@@ -68,7 +70,7 @@ static ssize_t nsim_dev_take_snapshot_write(struct file *file,
 
        devlink = priv_to_devlink(nsim_dev);
 
-       err = nsim_dev_take_snapshot(devlink, NULL, &dummy_data);
+       err = nsim_dev_take_snapshot(devlink, NULL, NULL, &dummy_data);
        if (err)
                return err;
 
diff --git a/include/net/devlink.h b/include/net/devlink.h
index c83cb6ceff78..cd01434ec7f3 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -547,7 +547,9 @@ struct devlink_info_req;
 struct devlink_region_ops {
        const char *name;
        void (*destructor)(const void *data);
-       int (*snapshot)(struct devlink *devlink, struct netlink_ext_ack *extack,
+       int (*snapshot)(struct devlink *devlink,
+                       const struct devlink_region_ops *ops,
+                       struct netlink_ext_ack *extack,
                        u8 **data);
        void *priv;
 };
diff --git a/net/core/devlink.c b/net/core/devlink.c
index e5b71f3c2d4d..3c5ef237b467 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4322,7 +4322,7 @@ devlink_nl_cmd_region_new(struct sk_buff *skb, struct 
genl_info *info)
                }
        }
 
-       err = region->ops->snapshot(devlink, info->extack, &data);
+       err = region->ops->snapshot(devlink, region->ops, info->extack, &data);
        if (err)
                goto err_snapshot_capture;
 
-- 
2.28.0