Re: [ovs-dev] [PATCH net-next v4 10/10] net: openvswitch: simplify the ovs_dp_cmd_new

[William Tu <u9012063@gmail.com>]

On Wed, Oct 16, 2019 at 5:56 AM <xiangxia.m.yue@gmail.com> wrote:
>
> From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
>
> use the specified functions to init resource.
>
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
> Tested-by: Greg Rose <gvrose8192@gmail.com>
> ---

Looks like this is simply moving code around.
I don't have any opinion.

>  net/openvswitch/datapath.c | 60 +++++++++++++++++++++++++++++-----------------
>  1 file changed, 38 insertions(+), 22 deletions(-)
>
> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
> index aeb76e4..4d48e48 100644
> --- a/net/openvswitch/datapath.c
> +++ b/net/openvswitch/datapath.c
> @@ -1576,6 +1576,31 @@ static int ovs_dp_change(struct datapath *dp, struct nlattr *a[])
>         return 0;
>  }
>
> +static int ovs_dp_stats_init(struct datapath *dp)
> +{
> +       dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
> +       if (!dp->stats_percpu)
> +               return -ENOMEM;
> +
> +       return 0;
> +}
> +
> +static int ovs_dp_vport_init(struct datapath *dp)
> +{
> +       int i;
> +
> +       dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS,
> +                                 sizeof(struct hlist_head),
> +                                 GFP_KERNEL);
> +       if (!dp->ports)
> +               return -ENOMEM;
> +
> +       for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
> +               INIT_HLIST_HEAD(&dp->ports[i]);
> +
> +       return 0;
> +}
> +
>  static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  {
>         struct nlattr **a = info->attrs;
> @@ -1584,7 +1609,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>         struct datapath *dp;
>         struct vport *vport;
>         struct ovs_net *ovs_net;
> -       int err, i;
> +       int err;
>
>         err = -EINVAL;
>         if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
> @@ -1597,35 +1622,26 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>         err = -ENOMEM;
>         dp = kzalloc(sizeof(*dp), GFP_KERNEL);
>         if (dp == NULL)
> -               goto err_free_reply;
> +               goto err_destroy_reply;
>
>         ovs_dp_set_net(dp, sock_net(skb->sk));
>
>         /* Allocate table. */
>         err = ovs_flow_tbl_init(&dp->table);
>         if (err)
> -               goto err_free_dp;
> +               goto err_destroy_dp;
>
> -       dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
> -       if (!dp->stats_percpu) {
> -               err = -ENOMEM;
> +       err = ovs_dp_stats_init(dp);
> +       if (err)
>                 goto err_destroy_table;
> -       }
>
> -       dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS,
> -                                 sizeof(struct hlist_head),
> -                                 GFP_KERNEL);
> -       if (!dp->ports) {
> -               err = -ENOMEM;
> -               goto err_destroy_percpu;
> -       }
> -
> -       for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
> -               INIT_HLIST_HEAD(&dp->ports[i]);
> +       err = ovs_dp_vport_init(dp);
> +       if (err)
> +               goto err_destroy_stats;
>
>         err = ovs_meters_init(dp);
>         if (err)
> -               goto err_destroy_ports_array;
> +               goto err_destroy_ports;
>
>         /* Set up our datapath device. */
>         parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
> @@ -1675,15 +1691,15 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>
>  err_destroy_meters:
>         ovs_meters_exit(dp);
> -err_destroy_ports_array:
> +err_destroy_ports:
>         kfree(dp->ports);
> -err_destroy_percpu:
> +err_destroy_stats:
>         free_percpu(dp->stats_percpu);
>  err_destroy_table:
>         ovs_flow_tbl_destroy(&dp->table);
> -err_free_dp:
> +err_destroy_dp:
>         kfree(dp);
> -err_free_reply:
> +err_destroy_reply:
>         kfree_skb(reply);
>  err:
>         return err;
> --
> 1.8.3.1
>
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