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Date: Wed, 25 Mar 2020 20:51:48 -0700
From: Jacob Keller <jacob.e.keller@...el.com>
To: netdev@...r.kernel.org
Cc: Jakub Kicinski <kuba@...nel.org>, Jiri Pirko <jiri@...nulli.us>,
Jacob Keller <jacob.e.keller@...el.com>,
Jiri Pirko <jiri@...lanox.com>
Subject: [net-next v2 02/11] devlink: convert snapshot destructor callback to region op
It does not makes sense that two snapshots for a given region would use
different destructors. Simplify snapshot creation by adding
a .destructor op for regions.
This operation will replace the data_destructor for the snapshot
creation, and makes snapshot creation easier.
Noticed-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx4/crdump.c | 6 ++++--
drivers/net/netdevsim/dev.c | 3 ++-
include/net/devlink.h | 7 +++----
net/core/devlink.c | 11 +++++------
4 files changed, 14 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/crdump.c b/drivers/net/ethernet/mellanox/mlx4/crdump.c
index cc2bf596c74b..c3f90c0f9554 100644
--- a/drivers/net/ethernet/mellanox/mlx4/crdump.c
+++ b/drivers/net/ethernet/mellanox/mlx4/crdump.c
@@ -43,10 +43,12 @@ static const char * const region_fw_health_str = "fw-health";
static const struct devlink_region_ops region_cr_space_ops = {
.name = region_cr_space_str,
+ .destructor = &kvfree,
};
static const struct devlink_region_ops region_fw_health_ops = {
.name = region_fw_health_str,
+ .destructor = &kvfree,
};
/* Set to true in case cr enable bit was set to true before crdump */
@@ -107,7 +109,7 @@ static void mlx4_crdump_collect_crspace(struct mlx4_dev *dev,
readl(cr_space + offset);
err = devlink_region_snapshot_create(crdump->region_crspace,
- crspace_data, id, &kvfree);
+ crspace_data, id);
if (err) {
kvfree(crspace_data);
mlx4_warn(dev, "crdump: devlink create %s snapshot id %d err %d\n",
@@ -146,7 +148,7 @@ static void mlx4_crdump_collect_fw_health(struct mlx4_dev *dev,
readl(health_buf_start + offset);
err = devlink_region_snapshot_create(crdump->region_fw_health,
- health_data, id, &kvfree);
+ health_data, id);
if (err) {
kvfree(health_data);
mlx4_warn(dev, "crdump: devlink create %s snapshot id %d err %d\n",
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 47a8f8c570c4..f7621ccb7b88 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -56,7 +56,7 @@ static ssize_t nsim_dev_take_snapshot_write(struct file *file,
id = devlink_region_snapshot_id_get(priv_to_devlink(nsim_dev));
err = devlink_region_snapshot_create(nsim_dev->dummy_region,
- dummy_data, id, kfree);
+ dummy_data, id);
if (err) {
pr_err("Failed to create region snapshot\n");
kfree(dummy_data);
@@ -342,6 +342,7 @@ static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
static const struct devlink_region_ops dummy_region_ops = {
.name = "dummy",
+ .destructor = &kfree,
};
static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 85db5dd5184d..8869ad75b965 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -496,14 +496,14 @@ enum devlink_param_generic_id {
struct devlink_region;
struct devlink_info_req;
-typedef void devlink_snapshot_data_dest_t(const void *data);
-
/**
* struct devlink_region_ops - Region operations
* @name: region name
+ * @destructor: callback used to free snapshot memory when deleting
*/
struct devlink_region_ops {
const char *name;
+ void (*destructor)(const void *data);
};
struct devlink_fmsg;
@@ -978,8 +978,7 @@ devlink_region_create(struct devlink *devlink,
void devlink_region_destroy(struct devlink_region *region);
u32 devlink_region_snapshot_id_get(struct devlink *devlink);
int devlink_region_snapshot_create(struct devlink_region *region,
- u8 *data, u32 snapshot_id,
- devlink_snapshot_data_dest_t *data_destructor);
+ u8 *data, u32 snapshot_id);
int devlink_info_serial_number_put(struct devlink_info_req *req,
const char *sn);
int devlink_info_driver_name_put(struct devlink_info_req *req,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index ca5362530567..84d74fbcff62 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -354,7 +354,6 @@ struct devlink_region {
struct devlink_snapshot {
struct list_head list;
struct devlink_region *region;
- devlink_snapshot_data_dest_t *data_destructor;
u8 *data;
u32 id;
};
@@ -3775,7 +3774,7 @@ static void devlink_region_snapshot_del(struct devlink_region *region,
devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
region->cur_snapshots--;
list_del(&snapshot->list);
- (*snapshot->data_destructor)(snapshot->data);
+ region->ops->destructor(snapshot->data);
kfree(snapshot);
}
@@ -7659,6 +7658,9 @@ devlink_region_create(struct devlink *devlink,
struct devlink_region *region;
int err = 0;
+ if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
+ return ERR_PTR(-EINVAL);
+
mutex_lock(&devlink->lock);
if (devlink_region_get_by_name(devlink, ops->name)) {
@@ -7745,11 +7747,9 @@ EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
* @region: devlink region of the snapshot
* @data: snapshot data
* @snapshot_id: snapshot id to be created
- * @data_destructor: pointer to destructor function to free data
*/
int devlink_region_snapshot_create(struct devlink_region *region,
- u8 *data, u32 snapshot_id,
- devlink_snapshot_data_dest_t *data_destructor)
+ u8 *data, u32 snapshot_id)
{
struct devlink *devlink = region->devlink;
struct devlink_snapshot *snapshot;
@@ -7777,7 +7777,6 @@ int devlink_region_snapshot_create(struct devlink_region *region,
snapshot->id = snapshot_id;
snapshot->region = region;
snapshot->data = data;
- snapshot->data_destructor = data_destructor;
list_add_tail(&snapshot->list, ®ion->snapshot_list);
--
2.24.1
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