xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

devlink: Add callback to query for snapshot id before snapshot create

Browse Source 
To restrict the driver with the snapshot ID selection a new callback
is introduced for the driver to get the snapshot ID before creating
a new snapshot. This will also allow giving the same ID for multiple
snapshots taken of different regions on the same time.

Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Vesker
2018-07-12 15:13:09 +03:00
committed by David S. Miller
parent b16ebe925a
commit ccadfa444b
2 changed files with 29 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
net/core/devlink.c
View File

@@ -4193,6 +4193,27 @@ void devlink_region_destroy(struct devlink_region *region)
}
EXPORT_SYMBOL_GPL(devlink_region_destroy);
/**
* devlink_region_shapshot_id_get - get snapshot ID
*
* This callback should be called when adding a new snapshot,
* Driver should use the same id for multiple snapshots taken
* on multiple regions at the same time/by the same trigger.
*
* @devlink: devlink
*/
u32 devlink_region_shapshot_id_get(struct devlink *devlink)
{
u32 id;
mutex_lock(&devlink->lock);
id = ++devlink->snapshot_id;
mutex_unlock(&devlink->lock);
return id;
}
EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
static int __init devlink_module_init(void)
{
return genl_register_family(&devlink_nl_family);