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authorBreno Leitao <leitao@debian.org>2024-03-04 10:38:07 -0800
committerJakub Kicinski <kuba@kernel.org>2024-03-05 18:32:33 -0800
commit46f480ec145886641374c4c4bdc7e6b56bc97adb (patch)
tree8688bef5906083d391365df25e8c9a0c2a7fd082 /drivers
parent60d06425e04558be21634a719b5c60c9bd862c34 (diff)
net: tuntap: Leverage core stats allocator
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 tun/tap driver and leverage the network core allocation instead. Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://lore.kernel.org/r/20240304183810.1474883-1-leitao@debian.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/tun.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index be37235af55d..6c594a3c2c37 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -977,20 +977,15 @@ static int tun_net_init(struct net_device *dev)
struct ifreq *ifr = tun->ifr;
int err;
- dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
- if (!dev->tstats)
- return -ENOMEM;
-
spin_lock_init(&tun->lock);
err = security_tun_dev_alloc_security(&tun->security);
- if (err < 0) {
- free_percpu(dev->tstats);
+ if (err < 0)
return err;
- }
tun_flow_init(tun);
+ dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST |
TUN_USER_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX;
@@ -1008,7 +1003,6 @@ static int tun_net_init(struct net_device *dev)
if (err < 0) {
tun_flow_uninit(tun);
security_tun_dev_free_security(tun->security);
- free_percpu(dev->tstats);
return err;
}
return 0;
@@ -2317,7 +2311,6 @@ static void tun_free_netdev(struct net_device *dev)
BUG_ON(!(list_empty(&tun->disabled)));
- free_percpu(dev->tstats);
tun_flow_uninit(tun);
security_tun_dev_free_security(tun->security);
__tun_set_ebpf(tun, &tun->steering_prog, NULL);