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[2a03:2880:30ff:2::face:b00c]) by smtp.gmail.com with ESMTPSA id gb42-20020a170907962a00b00a441a7a75b5sm9146201ejc.209.2024.03.08.03.27.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Mar 2024 03:27:54 -0800 (PST) From: Breno Leitao To: "Jason A. Donenfeld" , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, horms@kernel.org, dsahern@kernel.org, wireguard@lists.zx2c4.com (open list:WIREGUARD SECURE NETWORK TUNNEL) Subject: [PATCH net-next v2 1/2] wireguard: Leverage core stats allocator Date: Fri, 8 Mar 2024 03:27:44 -0800 Message-ID: <20240308112746.2290505-1-leitao@debian.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 wireguard driver and leverage the network core allocation instead. Signed-off-by: Breno Leitao -- Changelog: v2: * Setting dev->pcpu_stat_type was missing in v1 patch. --- drivers/net/wireguard/device.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireguard/device.c b/drivers/net/wireguard/device.c index deb9636b0ecf..6aa071469e1c 100644 --- a/drivers/net/wireguard/device.c +++ b/drivers/net/wireguard/device.c @@ -262,7 +262,6 @@ static void wg_destruct(struct net_device *dev) rcu_barrier(); /* Wait for all the peers to be actually freed. */ wg_ratelimiter_uninit(); memzero_explicit(&wg->static_identity, sizeof(wg->static_identity)); - free_percpu(dev->tstats); kvfree(wg->index_hashtable); kvfree(wg->peer_hashtable); mutex_unlock(&wg->device_update_lock); @@ -297,6 +296,7 @@ static void wg_setup(struct net_device *dev) dev->hw_enc_features |= WG_NETDEV_FEATURES; dev->mtu = ETH_DATA_LEN - overhead; dev->max_mtu = round_down(INT_MAX, MESSAGE_PADDING_MULTIPLE) - overhead; + dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; SET_NETDEV_DEVTYPE(dev, &device_type); @@ -331,14 +331,10 @@ static int wg_newlink(struct net *src_net, struct net_device *dev, if (!wg->index_hashtable) goto err_free_peer_hashtable; - dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); - if (!dev->tstats) - goto err_free_index_hashtable; - wg->handshake_receive_wq = alloc_workqueue("wg-kex-%s", WQ_CPU_INTENSIVE | WQ_FREEZABLE, 0, dev->name); if (!wg->handshake_receive_wq) - goto err_free_tstats; + goto err_free_index_hashtable; wg->handshake_send_wq = alloc_workqueue("wg-kex-%s", WQ_UNBOUND | WQ_FREEZABLE, 0, dev->name); @@ -397,8 +393,6 @@ static int wg_newlink(struct net *src_net, struct net_device *dev, destroy_workqueue(wg->handshake_send_wq); err_destroy_handshake_receive: destroy_workqueue(wg->handshake_receive_wq); -err_free_tstats: - free_percpu(dev->tstats); err_free_index_hashtable: kvfree(wg->index_hashtable); err_free_peer_hashtable: -- 2.43.0