netdev - [net-next PATCH v7 09/10] netdev-genl: spec: Add PID in netdev netlink YAML spec

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Message-ID: <169992182242.3867.5222784720149099153.stgit@anambiarhost.jf.intel.com>
Date: Mon, 13 Nov 2023 16:30:22 -0800
From: Amritha Nambiar <amritha.nambiar@...el.com>
To: netdev@...r.kernel.org, kuba@...nel.org, pabeni@...hat.com
Cc: sridhar.samudrala@...el.com, amritha.nambiar@...el.com
Subject: [net-next PATCH v7 09/10] netdev-genl: spec: Add PID in netdev
 netlink YAML spec

Add support in netlink spec(netdev.yaml) for PID of the
NAPI thread. Add code generated from the spec.

Signed-off-by: Amritha Nambiar <amritha.nambiar@...el.com>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@...el.com>
---
 Documentation/netlink/specs/netdev.yaml |    7 +++++++
 include/uapi/linux/netdev.h             |    1 +
 tools/include/uapi/linux/netdev.h       |    1 +
 tools/net/ynl/generated/netdev-user.c   |    6 ++++++
 tools/net/ynl/generated/netdev-user.h   |    2 ++
 5 files changed, 17 insertions(+)

diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml
index 7e0de0f928c7..aa15bb7449f9 100644
--- a/Documentation/netlink/specs/netdev.yaml
+++ b/Documentation/netlink/specs/netdev.yaml
@@ -108,6 +108,12 @@ attribute-sets:
         name: irq
         doc: The associated interrupt vector number for the napi
         type: u32
+      -
+        name: pid
+        doc: PID of the napi thread, if NAPI is configured to operate in
+             threaded mode. If NAPI is not in threaded mode (i.e. uses normal
+             softirq context), the attribute will be absent.
+        type: u32
   -
     name: queue
     attributes:
@@ -202,6 +208,7 @@ operations:
             - napi-id
             - ifindex
             - irq
+            - pid
       dump:
         request:
           attributes:
diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h
index d461915aa514..a13fb55b2dde 100644
--- a/include/uapi/linux/netdev.h
+++ b/include/uapi/linux/netdev.h
@@ -73,6 +73,7 @@ enum {
 	NETDEV_A_NAPI_IFINDEX = 1,
 	NETDEV_A_NAPI_NAPI_ID,
 	NETDEV_A_NAPI_IRQ,
+	NETDEV_A_NAPI_PID,
 
 	__NETDEV_A_NAPI_MAX,
 	NETDEV_A_NAPI_MAX = (__NETDEV_A_NAPI_MAX - 1)
diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h
index d461915aa514..a13fb55b2dde 100644
--- a/tools/include/uapi/linux/netdev.h
+++ b/tools/include/uapi/linux/netdev.h
@@ -73,6 +73,7 @@ enum {
 	NETDEV_A_NAPI_IFINDEX = 1,
 	NETDEV_A_NAPI_NAPI_ID,
 	NETDEV_A_NAPI_IRQ,
+	NETDEV_A_NAPI_PID,
 
 	__NETDEV_A_NAPI_MAX,
 	NETDEV_A_NAPI_MAX = (__NETDEV_A_NAPI_MAX - 1)
diff --git a/tools/net/ynl/generated/netdev-user.c b/tools/net/ynl/generated/netdev-user.c
index a3060531b42e..ca9a68f6bd72 100644
--- a/tools/net/ynl/generated/netdev-user.c
+++ b/tools/net/ynl/generated/netdev-user.c
@@ -102,6 +102,7 @@ struct ynl_policy_attr netdev_napi_policy[NETDEV_A_NAPI_MAX + 1] = {
 	[NETDEV_A_NAPI_IFINDEX] = { .name = "ifindex", .type = YNL_PT_U32, },
 	[NETDEV_A_NAPI_NAPI_ID] = { .name = "napi-id", .type = YNL_PT_U32, },
 	[NETDEV_A_NAPI_IRQ] = { .name = "irq", .type = YNL_PT_U32, },
+	[NETDEV_A_NAPI_PID] = { .name = "pid", .type = YNL_PT_U32, },
 };
 
 struct ynl_policy_nest netdev_napi_nest = {
@@ -400,6 +401,11 @@ int netdev_napi_get_rsp_parse(const struct nlmsghdr *nlh, void *data)
 				return MNL_CB_ERROR;
 			dst->_present.irq = 1;
 			dst->irq = mnl_attr_get_u32(attr);
+		} else if (type == NETDEV_A_NAPI_PID) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.pid = 1;
+			dst->pid = mnl_attr_get_u32(attr);
 		}
 	}
 
diff --git a/tools/net/ynl/generated/netdev-user.h b/tools/net/ynl/generated/netdev-user.h
index 947932a9359b..6836633cf6da 100644
--- a/tools/net/ynl/generated/netdev-user.h
+++ b/tools/net/ynl/generated/netdev-user.h
@@ -215,11 +215,13 @@ struct netdev_napi_get_rsp {
 		__u32 napi_id:1;
 		__u32 ifindex:1;
 		__u32 irq:1;
+		__u32 pid:1;
 	} _present;
 
 	__u32 napi_id;
 	__u32 ifindex;
 	__u32 irq;
+	__s32 pid;
 };
 
 void netdev_napi_get_rsp_free(struct netdev_napi_get_rsp *rsp);