[Linuxarm] Re: [RFCv6 PATCH net-next 02/19] net: replace general features macroes with global netdev_features variables

在 2022/4/19 22:49, Alexander Lobakin 写道:

From: Jian Shen shenjian15@huawei.com Date: Tue, 19 Apr 2022 10:21:49 +0800

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There are many netdev_features bits group used in kernel. The definition will be illegal when using feature bit more than 64. Replace these macroes with global netdev_features variables, initialize them when netdev module init.

Signed-off-by: Jian Shen shenjian15@huawei.com

drivers/net/wireguard/device.c | 10 +- include/linux/netdev_features.h | 102 +++++++++----- net/core/Makefile | 2 +- net/core/dev.c | 87 ++++++++++++ net/core/netdev_features.c | 241 ++++++++++++++++++++++++++++++++ 5 files changed, 400 insertions(+), 42 deletions(-) create mode 100644 net/core/netdev_features.c

--- 8< ---

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diff --git a/net/core/dev.c b/net/core/dev.c index 4d6b57752eee..85bb418e8ef1 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -146,6 +146,7 @@ #include <linux/sctp.h> #include <net/udp_tunnel.h> #include <linux/net_namespace.h> +#include <linux/netdev_features_helper.h> #include <linux/indirect_call_wrapper.h> #include <net/devlink.h> #include <linux/pm_runtime.h> @@ -11255,6 +11256,90 @@ static struct pernet_operations __net_initdata default_device_ops = { .exit_batch = default_device_exit_batch, };

+static void netdev_features_init(void)

It is an initialization function, so it must be marked as __init.

right, I will add it, thanks!

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+{

• netdev_features_t features;
• netdev_features_set_array(&netif_f_never_change_feature_set,

• 		  &netdev_never_change_features);
  

• netdev_features_set_array(&netif_f_gso_feature_set_mask,

I'm not sure it does make sense to have an empty newline between each call. I'd leave newlines only between the "regular" blocks and the "multi-call" blocks, I mean, stuff like VLAN, GSO and @netdev_ethtool_features.

At first, I added empty newline per call for the it used three lines. Now the new call just use two lines, I will remove some unnecessary blank lines.

Thanks!

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• 		  &netdev_gso_features_mask);
  

• netdev_features_set_array(&netif_f_ip_csum_feature_set,

• 		  &netdev_ip_csum_features);
  

• netdev_features_set_array(&netif_f_csum_feature_set_mask,

• 		  &netdev_csum_features_mask);
  

• netdev_features_set_array(&netif_f_general_tso_feature_set,

• 		  &netdev_general_tso_features);
  

• netdev_features_set_array(&netif_f_all_tso_feature_set,

• 		  &netdev_all_tso_features);
  

• netdev_features_set_array(&netif_f_tso_ecn_feature_set,

• 		  &netdev_tso_ecn_features);
  

• netdev_features_set_array(&netif_f_all_fcoe_feature_set,

• 		  &netdev_all_fcoe_features);
  

• netdev_features_set_array(&netif_f_gso_soft_feature_set,

• 		  &netdev_gso_software_features);
  

• netdev_features_set_array(&netif_f_one_for_all_feature_set,

• 		  &netdev_one_for_all_features);
  

• netdev_features_set_array(&netif_f_all_for_all_feature_set,

• 		  &netdev_all_for_all_features);
  

• netdev_features_set_array(&netif_f_upper_disables_feature_set,

• 		  &netdev_upper_disable_features);
  

• netdev_features_set_array(&netif_f_soft_feature_set,

• 		  &netdev_soft_features);
  

• netdev_features_set_array(&netif_f_soft_off_feature_set,

• 		  &netdev_soft_off_features);
  

• netdev_features_set_array(&netif_f_rx_vlan_feature_set,

• 		  &netdev_rx_vlan_features);
  

• netdev_features_set_array(&netif_f_tx_vlan_feature_set,

• 		  &netdev_tx_vlan_features);
  

• netdev_features_set_array(&netif_f_vlan_filter_feature_set,

• 		  &netdev_vlan_filter_features);
  

• netdev_all_vlan_features = netdev_rx_vlan_features;
• netdev_features_set(&netdev_all_vlan_features, netdev_tx_vlan_features);
• netdev_features_set(&netdev_all_vlan_features,

• 	    netdev_vlan_filter_features);
  

• netdev_features_set_array(&netif_f_ctag_vlan_feature_set,

• 		  &netdev_ctag_vlan_features);
  

• netdev_features_set_array(&netif_f_stag_vlan_feature_set,

• 		  &netdev_stag_vlan_features);
  

• netdev_features_set_array(&netif_f_gso_encap_feature_set,

• 		  &netdev_gso_encap_all_features);
  

• netdev_features_set_array(&netif_f_xfrm_feature_set,

• 		  &netdev_xfrm_features);
  

• netdev_features_set_array(&netif_f_tls_feature_set,

• 		  &netdev_tls_features);
  

• netdev_csum_gso_features_mask =

• netdev_features_or(netdev_gso_software_features,
  

• 		   netdev_csum_features_mask);
  

• netdev_features_fill(&features);
• netdev_ethtool_features =

• netdev_features_andnot(features, netdev_never_change_features);
  

+}

• /*
  • Initialize the DEV module. At boot time this walks the device list and
  • unhooks any devices that fail to initialise (normally hardware not

--- 8< ---

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-- 2.33.0

Thanks, Al

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