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

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Message-Id: <20200918191109.3640779-3-andrew@lunn.ch>
Date:   Fri, 18 Sep 2020 21:11:02 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     David Miller <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>, Chris Healy <cphealy@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jiri Pirko <jiri@...dia.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next v4 2/9] net: devlink: region: Pass the region ops to the snapshot function

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 <andrew@...n.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