Commit 51601046 authored by Joe Damato's avatar Joe Damato Committed by Jakub Kicinski
Browse files

netdev-genl: Dump napi_defer_hard_irqs 



Support dumping defer_hard_irqs for a NAPI ID.

Signed-off-by: default avatarJoe Damato <jdamato@fastly.com>
Reviewed-by: default avatarEric Dumazet <edumazet@google.com>
Reviewed-by: default avatarJakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20241011184527.16393-3-jdamato@fastly.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent f15e3b3d

Documentation/netlink/specs/netdev.yaml

+8 −0
Original line number Diff line number Diff line
@@ -248,6 +248,13 @@ attribute-sets: 
             threaded mode. If NAPI is not in threaded mode (i.e. uses normal

             softirq context), the attribute will be absent.

        type: u32

      -

        name: defer-hard-irqs

        doc: The number of consecutive empty polls before IRQ deferral ends

             and hardware IRQs are re-enabled.

        type: u32

        checks:

          max: s32-max

  -

    name: queue

    attributes:
@@ -636,6 +643,7 @@ operations: 
            - ifindex

            - irq

            - pid

            - defer-hard-irqs

      dump:

        request:

          attributes:

include/uapi/linux/netdev.h

+1 −0
Original line number Diff line number Diff line
@@ -122,6 +122,7 @@ enum { 
	NETDEV_A_NAPI_ID,

	NETDEV_A_NAPI_IRQ,

	NETDEV_A_NAPI_PID,

	NETDEV_A_NAPI_DEFER_HARD_IRQS,



	__NETDEV_A_NAPI_MAX,

	NETDEV_A_NAPI_MAX = (__NETDEV_A_NAPI_MAX - 1)

net/core/netdev-genl.c

+6 −0
Original line number Diff line number Diff line
@@ -161,6 +161,7 @@ static int 
netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi,

			const struct genl_info *info)

{

	u32 napi_defer_hard_irqs;

	void *hdr;

	pid_t pid;
@@ -189,6 +190,11 @@ netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi, 
			goto nla_put_failure;

	}



	napi_defer_hard_irqs = napi_get_defer_hard_irqs(napi);

	if (nla_put_s32(rsp, NETDEV_A_NAPI_DEFER_HARD_IRQS,

			napi_defer_hard_irqs))

		goto nla_put_failure;



	genlmsg_end(rsp, hdr);



	return 0;

tools/include/uapi/linux/netdev.h

+1 −0
Original line number Diff line number Diff line
@@ -122,6 +122,7 @@ enum { 
	NETDEV_A_NAPI_ID,

	NETDEV_A_NAPI_IRQ,

	NETDEV_A_NAPI_PID,

	NETDEV_A_NAPI_DEFER_HARD_IRQS,



	__NETDEV_A_NAPI_MAX,

	NETDEV_A_NAPI_MAX = (__NETDEV_A_NAPI_MAX - 1)