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net: rtnetlink: Add UAPI toggle for IFLA_OFFLOAD_XSTATS_L3_STATS

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The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. Add an attribute, IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS,
which should be carried by the RTM_SETSTATS message, and expresses a desire
to toggle L3 offload xstats on or off.

As part of the above, add an exported function rtnl_offload_xstats_notify()
that drivers can use when they have installed or deinstalled the counters
backing the HW stats.

At this point, it is possible to enable, disable and query L3 offload
xstats on netdevices. (However there is no driver actually implementing
these.)

Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2022-03-02 18:31:23 +02:00 • committed by David S. Miller
parent 03ba356670
commit 5fd0b838ef
4 changed files with 64 additions and 17 deletions
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1
include/uapi/linux/if_link.h
View file

@ -1227,6 +1227,7 @@ enum {
IFLA_STATS_GET_FILTERS, /* Nest of IFLA_STATS_LINK_xxx, each a u32 with
* a filter mask for the corresponding group.
*/
IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS, /* 0 or 1 as u8 */
__IFLA_STATS_GETSET_MAX,
};

2
include/uapi/linux/rtnetlink.h
View file

@ -767,6 +767,8 @@ enum rtnetlink_groups {
#define RTNLGRP_MCTP_IFADDR RTNLGRP_MCTP_IFADDR
RTNLGRP_TUNNEL,
#define RTNLGRP_TUNNEL RTNLGRP_TUNNEL
RTNLGRP_STATS,
#define RTNLGRP_STATS RTNLGRP_STATS
__RTNLGRP_MAX
};
#define RTNLGRP_MAX (__RTNLGRP_MAX - 1)