62 	struct devlink_snapshot *snapshot;  in devlink_region_snapshot_get_by_id()  local
64 	list_for_each_entry(snapshot, &region->snapshot_list, list)  in devlink_region_snapshot_get_by_id()
65 		if (snapshot->id == id)  in devlink_region_snapshot_get_by_id()
66 			return snapshot;  in devlink_region_snapshot_get_by_id()
73 					     struct devlink_snapshot *snapshot)  in devlink_nl_region_snapshot_id_put()  argument
82 	err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);  in devlink_nl_region_snapshot_id_put()
98 	struct devlink_snapshot *snapshot;  in devlink_nl_region_snapshots_id_put()  local
107 	list_for_each_entry(snapshot, &region->snapshot_list, list) {  in devlink_nl_region_snapshots_id_put()
108 		err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);  in devlink_nl_region_snapshots_id_put()
171 			       struct devlink_snapshot *snapshot,  in devlink_nl_region_notify_build()  argument
205 	if (snapshot) {  in devlink_nl_region_notify_build()
207 				  snapshot->id);  in devlink_nl_region_notify_build()
228 				     struct devlink_snapshot *snapshot,  in devlink_nl_region_notify()  argument
239 	msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);  in devlink_nl_region_notify()
265  *	@id: the snapshot id
267  *	Track when a new snapshot begins using an id. Load the count for the
268  *	given id from the snapshot xarray, increment it, and store it back.
270  *	Called when a new snapshot is created with the given id.
308  *	@id: the snapshot id
310  *	Track when a snapshot is deleted and stops using an id. Load the count
311  *	for the given id from the snapshot xarray, decrement it, and store it
317  *	Called when a snapshot using the given id is deleted, and when the
348  *	__devlink_snapshot_id_insert - Insert a specific snapshot ID
350  *	@id: the snapshot id
352  *	Mark the given snapshot id as used by inserting a zero value into the
353  *	snapshot xarray.
360  *	Returns zero on success, or an error code if the snapshot id could not
379  *	__devlink_region_snapshot_id_get - get snapshot ID
381  *	@id: storage to return snapshot id
383  *	Allocates a new snapshot id. Returns zero on success, or a negative
387  *	Snapshot IDs are tracked using an xarray which stores the number of
388  *	users of the snapshot id.
392  *	snapshot by using devlink_region_snapshot_id_put.
401  *	__devlink_region_snapshot_create - create a new snapshot
402  *	This will add a new snapshot of a region. The snapshot
408  *	Must be called only while holding the region snapshot lock.
410  *	@region: devlink region of the snapshot
411  *	@data: snapshot data
412  *	@snapshot_id: snapshot id to be created
419 	struct devlink_snapshot *snapshot;  in __devlink_region_snapshot_create()  local
424 	/* check if region can hold one more snapshot */  in __devlink_region_snapshot_create()
431 	snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);  in __devlink_region_snapshot_create()
432 	if (!snapshot)  in __devlink_region_snapshot_create()
439 	snapshot->id = snapshot_id;  in __devlink_region_snapshot_create()
440 	snapshot->region = region;  in __devlink_region_snapshot_create()
441 	snapshot->data = data;  in __devlink_region_snapshot_create()
443 	list_add_tail(&snapshot->list, &region->snapshot_list);  in __devlink_region_snapshot_create()
447 	devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);  in __devlink_region_snapshot_create()
451 	kfree(snapshot);  in __devlink_region_snapshot_create()
456 					struct devlink_snapshot *snapshot)  in devlink_region_snapshot_del()  argument
462 	devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);  in devlink_region_snapshot_del()
464 	list_del(&snapshot->list);  in devlink_region_snapshot_del()
465 	region->ops->destructor(snapshot->data);  in devlink_region_snapshot_del()
466 	__devlink_snapshot_id_decrement(devlink, snapshot->id);  in devlink_region_snapshot_del()
467 	kfree(snapshot);  in devlink_region_snapshot_del()
592 	struct devlink_snapshot *snapshot;  in devlink_nl_region_del_doit()  local
623 	snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);  in devlink_nl_region_del_doit()
624 	if (!snapshot) {  in devlink_nl_region_del_doit()
629 	devlink_region_snapshot_del(region, snapshot);  in devlink_nl_region_del_doit()
637 	struct devlink_snapshot *snapshot;  in devlink_nl_region_new_doit()  local
672 	if (!region->ops->snapshot) {  in devlink_nl_region_new_doit()
673 …NL_SET_ERR_MSG(info->extack, "The requested region does not support taking an immediate snapshot");  in devlink_nl_region_new_doit()
690 			NL_SET_ERR_MSG(info->extack, "The requested snapshot id is already in use");  in devlink_nl_region_new_doit()
701 			NL_SET_ERR_MSG(info->extack, "Failed to allocate a new snapshot id");  in devlink_nl_region_new_doit()
707 		err = region->port_ops->snapshot(port, region->port_ops,  in devlink_nl_region_new_doit()
710 		err = region->ops->snapshot(devlink, region->ops,  in devlink_nl_region_new_doit()
722 		snapshot = devlink_region_snapshot_get_by_id(region,  in devlink_nl_region_new_doit()
724 		if (WARN_ON(!snapshot)) {  in devlink_nl_region_new_doit()
729 		msg = devlink_nl_region_notify_build(region, snapshot,  in devlink_nl_region_new_doit()
753 	devlink_region_snapshot_del(region, snapshot);  in devlink_nl_region_new_doit()
836 	struct devlink_snapshot *snapshot = cb_priv;  in devlink_region_snapshot_fill()  local
838 	memcpy(chunk, &snapshot->data[curr_offset], chunk_size);  in devlink_region_snapshot_fill()
921 			NL_SET_ERR_MSG(cb->extack, "No snapshot id provided");  in devlink_nl_region_read_dumpit()
938 		struct devlink_snapshot *snapshot;  in devlink_nl_region_read_dumpit()  local
942 			NL_SET_ERR_MSG_ATTR(cb->extack, snapshot_attr, "Direct region read does not use snapshot");  in devlink_nl_region_read_dumpit()
948 		snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);  in devlink_nl_region_read_dumpit()
949 		if (!snapshot) {  in devlink_nl_region_read_dumpit()
950 			NL_SET_ERR_MSG_ATTR(cb->extack, snapshot_attr, "Requested snapshot does not exist");  in devlink_nl_region_read_dumpit()
955 		region_cb_priv = snapshot;  in devlink_nl_region_read_dumpit()
1164 	struct devlink_snapshot *snapshot, *ts;  in devl_region_destroy()  local
1170 	list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)  in devl_region_destroy()
1171 		devlink_region_snapshot_del(region, snapshot);  in devl_region_destroy()
1200  *	devlink_region_snapshot_id_get - get snapshot ID
1202  *	This callback should be called when adding a new snapshot,
1221  *	devlink_region_snapshot_id_put - put snapshot ID reference
1237  *	devlink_region_snapshot_create - create a new snapshot
1238  *	This will add a new snapshot of a region. The snapshot
1244  *	@region: devlink region of the snapshot
1245  *	@data: snapshot data
1246  *	@snapshot_id: snapshot id to be created