netdev - [net-next PATCH v1 8/9] netdev-genl: spec: Add PID in netdev netlink YAML spec

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Date: Fri, 28 Jul 2023 17:47:33 -0700
From: Amritha Nambiar <amritha.nambiar@...el.com>
To: netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net
Cc: sridhar.samudrala@...el.com, amritha.nambiar@...el.com
Subject: [net-next PATCH v1 8/9] 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>
---
 Documentation/netlink/specs/netdev.yaml |    4 ++++
 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, 14 insertions(+)

diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml
index c7f72038184d..8cbdf1f72527 100644
--- a/Documentation/netlink/specs/netdev.yaml
+++ b/Documentation/netlink/specs/netdev.yaml
@@ -89,6 +89,10 @@ attribute-sets:
         name: irq
         doc: The associated interrupt vector number for the napi
         type: u32
+      -
+        name: pid
+        doc: PID of the napi thread
+        type: s32
   -
     name: napi
     attributes:
diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h
index 17782585be72..d01db79615e4 100644
--- a/include/uapi/linux/netdev.h
+++ b/include/uapi/linux/netdev.h
@@ -53,6 +53,7 @@ enum {
 	NETDEV_A_NAPI_INFO_ENTRY_RX_QUEUES,
 	NETDEV_A_NAPI_INFO_ENTRY_TX_QUEUES,
 	NETDEV_A_NAPI_INFO_ENTRY_IRQ,
+	NETDEV_A_NAPI_INFO_ENTRY_PID,
 
 	__NETDEV_A_NAPI_INFO_ENTRY_MAX,
 	NETDEV_A_NAPI_INFO_ENTRY_MAX = (__NETDEV_A_NAPI_INFO_ENTRY_MAX - 1)
diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h
index 17782585be72..d01db79615e4 100644
--- a/tools/include/uapi/linux/netdev.h
+++ b/tools/include/uapi/linux/netdev.h
@@ -53,6 +53,7 @@ enum {
 	NETDEV_A_NAPI_INFO_ENTRY_RX_QUEUES,
 	NETDEV_A_NAPI_INFO_ENTRY_TX_QUEUES,
 	NETDEV_A_NAPI_INFO_ENTRY_IRQ,
+	NETDEV_A_NAPI_INFO_ENTRY_PID,
 
 	__NETDEV_A_NAPI_INFO_ENTRY_MAX,
 	NETDEV_A_NAPI_INFO_ENTRY_MAX = (__NETDEV_A_NAPI_INFO_ENTRY_MAX - 1)
diff --git a/tools/net/ynl/generated/netdev-user.c b/tools/net/ynl/generated/netdev-user.c
index 74c24be5641c..51f69a4ea59b 100644
--- a/tools/net/ynl/generated/netdev-user.c
+++ b/tools/net/ynl/generated/netdev-user.c
@@ -52,6 +52,7 @@ struct ynl_policy_attr netdev_napi_info_entry_policy[NETDEV_A_NAPI_INFO_ENTRY_MA
 	[NETDEV_A_NAPI_INFO_ENTRY_RX_QUEUES] = { .name = "rx-queues", .type = YNL_PT_U32, },
 	[NETDEV_A_NAPI_INFO_ENTRY_TX_QUEUES] = { .name = "tx-queues", .type = YNL_PT_U32, },
 	[NETDEV_A_NAPI_INFO_ENTRY_IRQ] = { .name = "irq", .type = YNL_PT_U32, },
+	[NETDEV_A_NAPI_INFO_ENTRY_PID] = { .name = "pid", .type = YNL_PT_U32, },
 };
 
 struct ynl_policy_nest netdev_napi_info_entry_nest = {
@@ -119,6 +120,11 @@ int netdev_napi_info_entry_parse(struct ynl_parse_arg *yarg,
 				return MNL_CB_ERROR;
 			dst->_present.irq = 1;
 			dst->irq = mnl_attr_get_u32(attr);
+		} else if (type == NETDEV_A_NAPI_INFO_ENTRY_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 a0833eb9a52f..942f377876b0 100644
--- a/tools/net/ynl/generated/netdev-user.h
+++ b/tools/net/ynl/generated/netdev-user.h
@@ -24,6 +24,7 @@ struct netdev_napi_info_entry {
 	struct {
 		__u32 napi_id:1;
 		__u32 irq:1;
+		__u32 pid:1;
 	} _present;
 
 	__u32 napi_id;
@@ -32,6 +33,7 @@ struct netdev_napi_info_entry {
 	unsigned int n_tx_queues;
 	__u32 *tx_queues;
 	__u32 irq;
+	__s32 pid;
 };
 
 /* ============== NETDEV_CMD_DEV_GET ============== */