git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-18 06:33:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

net: add gso_ipv4_max_size and gro_ipv4_max_size per device

Browse Source 
This patch introduces gso_ipv4_max_size and gro_ipv4_max_size
per device and adds netlink attributes for them, so that IPV4
BIG TCP can be guarded by a separate tunable in the next patch.

To not break the old application using "gso/gro_max_size" for
IPv4 GSO packets, this patch updates "gso/gro_ipv4_max_size"
in netif_set_gso/gro_max_size() if the new size isn't greater
than GSO_LEGACY_MAX_SIZE, so that nothing will change even if
userspace doesn't realize the new netlink attributes.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xin Long
2023-01-28 10:58:38 -05:00
committed by Jakub Kicinski
parent 8e08bb75b6
commit 9eefedd58a
5 changed files with 64 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/netdevice.h
View File

@@ -1964,6 +1964,8 @@ enum netdev_ml_priv_type {
* @gso_max_segs: Maximum number of segments that can be passed to the
* NIC for GSO
* @tso_max_segs: Device (as in HW) limit on the max TSO segment count
* @gso_ipv4_max_size: Maximum size of generic segmentation offload,
* for IPv4.
*
* @dcbnl_ops: Data Center Bridging netlink ops
* @num_tc: Number of traffic classes in the net device
@@ -2004,6 +2006,8 @@ enum netdev_ml_priv_type {
* keep a list of interfaces to be deleted.
* @gro_max_size: Maximum size of aggregated packet in generic
* receive offload (GRO)
* @gro_ipv4_max_size: Maximum size of aggregated packet in generic
* receive offload (GRO), for IPv4.
*
* @dev_addr_shadow: Copy of @dev_addr to catch direct writes.
* @linkwatch_dev_tracker: refcount tracker used by linkwatch.
@@ -2207,6 +2211,7 @@ struct net_device {
*/
#define GRO_MAX_SIZE (8 * 65535u)
unsigned int gro_max_size;
unsigned int gro_ipv4_max_size;
rx_handler_func_t __rcu *rx_handler;
void __rcu *rx_handler_data;
@@ -2330,6 +2335,7 @@ struct net_device {
u16 gso_max_segs;
#define TSO_MAX_SEGS U16_MAX
u16 tso_max_segs;
unsigned int gso_ipv4_max_size;
#ifdef CONFIG_DCB
const struct dcbnl_rtnl_ops *dcbnl_ops;