vxlan: Do not alloc tstats manually

With commit 34d21de99cea9 ("net: Move {l,t,d}stats allocation to core and
convert veth & vrf"), stats allocation could be done on net core
instead of in this driver.

With this new approach, the driver doesn't have to bother with error
handling (allocation failure checking, making sure free happens in the
right spot, etc). This is core responsibility now.

Remove the allocation in the vxlan driver and leverage the network
core allocation instead.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://lore.kernel.org/r/20240311112437.3813987-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 386cbe4d33272791e80470bd1378731d0c3b4d3b..6f26003a30646b23121949b28a94c1e3833e1a00 100644 (file)
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2841,15 +2841,9 @@ static int vxlan_init(struct net_device *dev)
        if (vxlan->cfg.flags & VXLAN_F_VNIFILTER)
                vxlan_vnigroup_init(vxlan);
 
-       dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
-       if (!dev->tstats) {
-               err = -ENOMEM;
-               goto err_vnigroup_uninit;
-       }
-
        err = gro_cells_init(&vxlan->gro_cells, dev);
        if (err)
-               goto err_free_percpu;
+               goto err_vnigroup_uninit;
 
        err = vxlan_mdb_init(vxlan);
        if (err)
@@ -2860,8 +2854,6 @@ static int vxlan_init(struct net_device *dev)
 
 err_gro_cells_destroy:
        gro_cells_destroy(&vxlan->gro_cells);
-err_free_percpu:
-       free_percpu(dev->tstats);
 err_vnigroup_uninit:
        if (vxlan->cfg.flags & VXLAN_F_VNIFILTER)
                vxlan_vnigroup_uninit(vxlan);
@@ -2892,8 +2884,6 @@ static void vxlan_uninit(struct net_device *dev)
        gro_cells_destroy(&vxlan->gro_cells);
 
        vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
-
-       free_percpu(dev->tstats);
 }
 
 /* Start ageing timer and join group when device is brought up */
@@ -3316,6 +3306,7 @@ static void vxlan_setup(struct net_device *dev)
        dev->min_mtu = ETH_MIN_MTU;
        dev->max_mtu = ETH_MAX_MTU;
 
+       dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
        INIT_LIST_HEAD(&vxlan->next);
 
        timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE);