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Date: Fri, 15 Jan 2021 18:30:58 +0200
From: Ido Schimmel <idosch@...sch.org>
To: Jiri Pirko <jiri@...nulli.us>
Cc: netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
jacob.e.keller@...el.com, roopa@...dia.com, mlxsw@...dia.com
Subject: Re: [patch net-next RFC 08/10] netdevsim: create devlink line card
object and implement provisioning
On Wed, Jan 13, 2021 at 01:12:20PM +0100, Jiri Pirko wrote:
> @@ -977,6 +1012,9 @@ static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
> memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
> attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
> devlink_port_attrs_set(devlink_port, &attrs);
> + if (nsim_dev_linecard)
> + devlink_port_linecard_set(devlink_port,
> + nsim_dev_linecard->devlink_linecard);
Should be fold into devlink_port_attrs_set()
> err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
> nsim_dev_port->port_index);
> if (err)
> @@ -1053,10 +1091,88 @@ static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
> return err;
> }
>
> +static void nsim_dev_linecard_provision_work(struct work_struct *work)
> +{
> + struct nsim_dev_linecard *nsim_dev_linecard;
> + struct nsim_bus_dev *nsim_bus_dev;
> + int err;
> + int i;
> +
> + nsim_dev_linecard = container_of(work, struct nsim_dev_linecard,
> + provision_work);
> +
> + nsim_bus_dev = nsim_dev_linecard->nsim_dev->nsim_bus_dev;
> + for (i = 0; i < nsim_dev_linecard_port_count(nsim_dev_linecard); i++) {
> + err = nsim_dev_port_add(nsim_bus_dev, nsim_dev_linecard, i);
> + if (err)
> + goto err_port_del_all;
> + }
> + nsim_dev_linecard->provisioned = true;
> + devlink_linecard_provision_set(nsim_dev_linecard->devlink_linecard,
> + nsim_dev_linecard->type_index);
> + return;
> +
> +err_port_del_all:
> + for (i--; i >= 0; i--)
> + nsim_dev_port_del(nsim_bus_dev, nsim_dev_linecard, i);
> + devlink_linecard_provision_clear(nsim_dev_linecard->devlink_linecard);
> +}
> +
> +static int nsim_dev_linecard_provision(struct devlink_linecard *linecard,
> + void *priv, u32 type_index,
> + struct netlink_ext_ack *extack)
> +{
> + struct nsim_dev_linecard *nsim_dev_linecard = priv;
> +
> + nsim_dev_linecard->type_index = type_index;
> + INIT_WORK(&nsim_dev_linecard->provision_work,
> + nsim_dev_linecard_provision_work);
> + schedule_work(&nsim_dev_linecard->provision_work);
> +
> + return 0;
> +}
> +
> +static void nsim_dev_linecard_unprovision_work(struct work_struct *work)
> +{
> + struct nsim_dev_linecard *nsim_dev_linecard;
> + struct nsim_bus_dev *nsim_bus_dev;
> + int i;
> +
> + nsim_dev_linecard = container_of(work, struct nsim_dev_linecard,
> + provision_work);
> +
> + nsim_bus_dev = nsim_dev_linecard->nsim_dev->nsim_bus_dev;
> + nsim_dev_linecard->provisioned = false;
> + devlink_linecard_provision_clear(nsim_dev_linecard->devlink_linecard);
> + for (i = 0; i < nsim_dev_linecard_port_count(nsim_dev_linecard); i++)
> + nsim_dev_port_del(nsim_bus_dev, nsim_dev_linecard, i);
> +}
> +
> +static int nsim_dev_linecard_unprovision(struct devlink_linecard *linecard,
> + void *priv,
> + struct netlink_ext_ack *extack)
> +{
> + struct nsim_dev_linecard *nsim_dev_linecard = priv;
> +
> + INIT_WORK(&nsim_dev_linecard->provision_work,
> + nsim_dev_linecard_unprovision_work);
> + schedule_work(&nsim_dev_linecard->provision_work);
> +
> + return 0;
> +}
> +
> +static const struct devlink_linecard_ops nsim_dev_linecard_ops = {
> + .supported_types = nsim_dev_linecard_supported_types,
> + .supported_types_count = ARRAY_SIZE(nsim_dev_linecard_supported_types),
> + .provision = nsim_dev_linecard_provision,
> + .unprovision = nsim_dev_linecard_unprovision,
> +};
> +
> static int __nsim_dev_linecard_add(struct nsim_dev *nsim_dev,
> unsigned int linecard_index)
> {
> struct nsim_dev_linecard *nsim_dev_linecard;
> + struct devlink_linecard *devlink_linecard;
> int err;
>
> nsim_dev_linecard = kzalloc(sizeof(*nsim_dev_linecard), GFP_KERNEL);
> @@ -1066,14 +1182,27 @@ static int __nsim_dev_linecard_add(struct nsim_dev *nsim_dev,
> nsim_dev_linecard->linecard_index = linecard_index;
> INIT_LIST_HEAD(&nsim_dev_linecard->port_list);
>
> + devlink_linecard = devlink_linecard_create(priv_to_devlink(nsim_dev),
> + linecard_index,
> + &nsim_dev_linecard_ops,
> + nsim_dev_linecard);
> + if (IS_ERR(devlink_linecard)) {
> + err = PTR_ERR(devlink_linecard);
> + goto err_linecard_free;
> + }
> +
> + nsim_dev_linecard->devlink_linecard = devlink_linecard;
> +
> err = nsim_dev_linecard_debugfs_init(nsim_dev, nsim_dev_linecard);
> if (err)
> - goto err_linecard_free;
> + goto err_dl_linecard_destroy;
>
> list_add(&nsim_dev_linecard->list, &nsim_dev->linecard_list);
>
> return 0;
>
> +err_dl_linecard_destroy:
> + devlink_linecard_destroy(devlink_linecard);
> err_linecard_free:
> kfree(nsim_dev_linecard);
> return err;
> @@ -1081,8 +1210,12 @@ static int __nsim_dev_linecard_add(struct nsim_dev *nsim_dev,
>
> static void __nsim_dev_linecard_del(struct nsim_dev_linecard *nsim_dev_linecard)
> {
> + struct devlink_linecard *devlink_linecard =
> + nsim_dev_linecard->devlink_linecard;
> +
> list_del(&nsim_dev_linecard->list);
> nsim_dev_linecard_debugfs_exit(nsim_dev_linecard);
What about the delayed work? I believe it can run while you are
destroying the linecard, so cancel_delayed_work_sync() is needed
> + devlink_linecard_destroy(devlink_linecard);
> kfree(nsim_dev_linecard);
> }
>
> diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
> index 88b61b9390bf..ab217b361416 100644
> --- a/drivers/net/netdevsim/netdevsim.h
> +++ b/drivers/net/netdevsim/netdevsim.h
> @@ -196,10 +196,14 @@ struct nsim_dev;
>
> struct nsim_dev_linecard {
> struct list_head list;
> + struct devlink_linecard *devlink_linecard;
> struct nsim_dev *nsim_dev;
> struct list_head port_list;
> unsigned int linecard_index;
> struct dentry *ddir;
> + bool provisioned;
> + u32 type_index;
> + struct work_struct provision_work;
> };
>
> struct nsim_dev {
> --
> 2.26.2
>
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