From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sven Eckelmann <sven@narfation.org>,
Matthias Schiffer <mschiffer@universe-factory.net>,
Simon Wunderlich <sw@simonwunderlich.de>,
Sasha Levin <sashal@kernel.org>,
b.a.t.m.a.n@lists.open-mesh.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 051/175] batman-adv: Revert "disable ethtool link speed detection when auto negotiation off"
Date: Mon, 8 Jun 2020 19:16:44 -0400 [thread overview]
Message-ID: <20200608231848.3366970-51-sashal@kernel.org> (raw)
In-Reply-To: <20200608231848.3366970-1-sashal@kernel.org>
From: Sven Eckelmann <sven@narfation.org>
[ Upstream commit 9ad346c90509ebd983f60da7d082f261ad329507 ]
The commit 8c46fcd78308 ("batman-adv: disable ethtool link speed detection
when auto negotiation off") disabled the usage of ethtool's link_ksetting
when auto negotation was enabled due to invalid values when used with
tun/tap virtual net_devices. According to the patch, automatic measurements
should be used for these kind of interfaces.
But there are major flaws with this argumentation:
* automatic measurements are not implemented
* auto negotiation has nothing to do with the validity of the retrieved
values
The first point has to be fixed by a longer patch series. The "validity"
part of the second point must be addressed in the same patch series by
dropping the usage of ethtool's link_ksetting (thus always doing automatic
measurements over ethernet).
Drop the patch again to have more default values for various net_device
types/configurations. The user can still overwrite them using the
batadv_hardif's BATADV_ATTR_THROUGHPUT_OVERRIDE.
Reported-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/batman-adv/bat_v_elp.c | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index 2614a9caee00..a39af0eefad3 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -120,20 +120,7 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
rtnl_lock();
ret = __ethtool_get_link_ksettings(hard_iface->net_dev, &link_settings);
rtnl_unlock();
-
- /* Virtual interface drivers such as tun / tap interfaces, VLAN, etc
- * tend to initialize the interface throughput with some value for the
- * sake of having a throughput number to export via ethtool. This
- * exported throughput leaves batman-adv to conclude the interface
- * throughput is genuine (reflecting reality), thus no measurements
- * are necessary.
- *
- * Based on the observation that those interface types also tend to set
- * the link auto-negotiation to 'off', batman-adv shall check this
- * setting to differentiate between genuine link throughput information
- * and placeholders installed by virtual interfaces.
- */
- if (ret == 0 && link_settings.base.autoneg == AUTONEG_ENABLE) {
+ if (ret == 0) {
/* link characteristics might change over time */
if (link_settings.base.duplex == DUPLEX_FULL)
hard_iface->bat_v.flags |= BATADV_FULL_DUPLEX;
--
2.25.1
next prev parent reply other threads:[~2020-06-09 0:11 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200608231848.3366970-1-sashal@kernel.org>
2020-06-08 23:15 ` [PATCH AUTOSEL 5.4 002/175] ath10k: Fix the race condition in firmware dump work queue Sasha Levin
2020-06-08 23:15 ` [PATCH AUTOSEL 5.4 003/175] ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb Sasha Levin
2020-06-08 23:15 ` [PATCH AUTOSEL 5.4 004/175] ath9k: Fix use-after-free Write in ath9k_htc_rx_msg Sasha Levin
2020-06-08 23:15 ` [PATCH AUTOSEL 5.4 005/175] ath9k: Fix use-after-free Read in htc_connect_service Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 016/175] libbpf: Fix memory leak and possible double-free in hashmap__clear Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 020/175] net: atlantic: make hw_get_regs optional Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 021/175] net: ena: fix error returning in ena_com_get_hash_function() Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 023/175] ath10k: remove the max_sched_scan_reqs value Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 026/175] rtw88: fix an issue about leak system resources Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 035/175] ixgbe: Fix XDP redirect on archs with PAGE_SIZE above 4K Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 038/175] Bluetooth: Add SCO fallback for invalid LMP parameters error Sasha Levin
2020-06-08 23:16 ` Sasha Levin [this message]
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 052/175] ice: Fix memory leak Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 053/175] ice: Fix for memory leaks and modify ICE_FREE_CQ_BUFS Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 058/175] net: vmxnet3: fix possible buffer overflow caused by bad DMA value in vmxnet3_get_rss() Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 059/175] tun: correct header offsets in napi frags mode Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 062/175] ath10k: fix kernel null pointer dereference Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 063/175] ath9k: Fix use-after-free Read in ath9k_wmi_ctrl_rx Sasha Levin
2020-06-08 23:16 ` [PATCH AUTOSEL 5.4 064/175] ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 067/175] brcmfmac: fix wrong location to get firmware feature Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 070/175] e1000: Distribute switch variables for initialization Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 077/175] ath10k: add flush tx packets for SDIO chip Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 081/175] dpaa2-eth: fix return codes used in ndo_setup_tc Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 082/175] netfilter: nft_nat: return EOPNOTSUPP if type or flags are not supported Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 083/175] selftests/bpf: Fix memory leak in extract_build_id() Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 084/175] net: bcmgenet: set Rx mode before starting netif Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 085/175] net: bcmgenet: Fix WoL with password after deep sleep Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 092/175] net: lpc-enet: fix error return code in lpc_mii_init() Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 094/175] drivers: net: davinci_mdio: fix potential NULL dereference in davinci_mdio_probe() Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 096/175] net: allwinner: Fix use correct return type for ndo_start_xmit() Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 098/175] ath9k_htc: Silence undersized packet warnings Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 099/175] libertas_tf: avoid a null dereference in pointer priv Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 112/175] iwlwifi: avoid debug max amsdu config overwriting itself Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 116/175] ath10k: Remove msdu from idr when management pkt send fails Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 117/175] wcn36xx: Fix error handling path in 'wcn36xx_probe()' Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 118/175] net: qed*: Reduce RX and TX default ring count when running inside kdump kernel Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 120/175] mt76: avoid rx reorder buffer overflow Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 123/175] net: dsa: mt7530: set CPU port to fallback mode Sasha Levin
2020-06-08 23:17 ` [PATCH AUTOSEL 5.4 126/175] veth: Adjust hard_start offset on redirect XDP frames Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 127/175] net/mlx5e: IPoIB, Drop multicast packets that this interface sent Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 128/175] rtlwifi: Fix a double free in _rtl_usb_tx_urb_setup() Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 129/175] mwifiex: Fix memory corruption in dump_station Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 140/175] selftests/bpf: CONFIG_IPV6_SEG6_BPF required for test_seg6_loop.o Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 146/175] net: ethernet: fec: move GPR register offset and bit into DT Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 147/175] macvlan: Skip loopback packets in RX handler Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 157/175] ice: fix potential double free in probe unrolling Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 158/175] ixgbe: fix signed-integer-overflow warning Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 159/175] iwlwifi: mvm: fix aux station leak Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 167/175] vxlan: Avoid infinite loop when suppressing NS messages with invalid options Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 168/175] libbpf: Fix perf_buffer__free() API for sparse allocs Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 169/175] bpf: Fix map permissions check Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 170/175] bpf: Refactor sockmap redirect code so its easy to reuse Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 171/175] bpf: Fix running sk_skb program types with ktls Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 172/175] selftests/bpf, flow_dissector: Close TAP device FD after the test Sasha Levin
2020-06-08 23:18 ` [PATCH AUTOSEL 5.4 173/175] net_failover: fixed rollback in net_failover_open() Sasha Levin
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