netdev - [PATCH net] netdev: add qstat for csum complete

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Date: Wed, 29 May 2024 09:35:47 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	Jakub Kicinski <kuba@...nel.org>,
	donald.hunter@...il.com,
	sdf@...gle.com,
	amritha.nambiar@...el.com,
	hawk@...nel.org,
	sridhar.samudrala@...el.com,
	jdamato@...tly.com
Subject: [PATCH net] netdev: add qstat for csum complete

Recent commit 0cfe71f45f42 ("netdev: add queue stats") added
a lot of useful stats, but only those immediately needed by virtio.
Presumably virtio does not support CHECKSUM_COMPLETE,
so statistic for that form of checksumming wasn't included.
Other drivers will definitely need it, in fact we expect it
to be needed in net-next soon (mlx5). So let's add the definition
of the counter for CHECKSUM_COMPLETE to uAPI in net already,
so that the counters are in a more natural order (all subsequent
counters have not been present in any released kernel, yet).

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: donald.hunter@...il.com
CC: sdf@...gle.com
CC: amritha.nambiar@...el.com
CC: hawk@...nel.org
CC: sridhar.samudrala@...el.com
CC: jdamato@...tly.com
---
 Documentation/netlink/specs/netdev.yaml | 4 ++++
 include/uapi/linux/netdev.h             | 1 +
 tools/include/uapi/linux/netdev.h       | 1 +
 3 files changed, 6 insertions(+)

diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml
index 11a32373365a..959755be4d7f 100644
--- a/Documentation/netlink/specs/netdev.yaml
+++ b/Documentation/netlink/specs/netdev.yaml
@@ -349,6 +349,10 @@ name: netdev
           Number of packets dropped due to transient lack of resources, such as
           buffer space, host descriptors etc.
         type: uint
+      -
+        name: rx-csum-complete
+        doc: Number of packets that were marked as CHECKSUM_COMPLETE.
+        type: uint
       -
         name: rx-csum-unnecessary
         doc: Number of packets that were marked as CHECKSUM_UNNECESSARY.
diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h
index a8188202413e..43742ac5b00d 100644
--- a/include/uapi/linux/netdev.h
+++ b/include/uapi/linux/netdev.h
@@ -148,6 +148,7 @@ enum {
 	NETDEV_A_QSTATS_RX_ALLOC_FAIL,
 	NETDEV_A_QSTATS_RX_HW_DROPS,
 	NETDEV_A_QSTATS_RX_HW_DROP_OVERRUNS,
+	NETDEV_A_QSTATS_RX_CSUM_COMPLETE,
 	NETDEV_A_QSTATS_RX_CSUM_UNNECESSARY,
 	NETDEV_A_QSTATS_RX_CSUM_NONE,
 	NETDEV_A_QSTATS_RX_CSUM_BAD,
diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h
index a8188202413e..43742ac5b00d 100644
--- a/tools/include/uapi/linux/netdev.h
+++ b/tools/include/uapi/linux/netdev.h
@@ -148,6 +148,7 @@ enum {
 	NETDEV_A_QSTATS_RX_ALLOC_FAIL,
 	NETDEV_A_QSTATS_RX_HW_DROPS,
 	NETDEV_A_QSTATS_RX_HW_DROP_OVERRUNS,
+	NETDEV_A_QSTATS_RX_CSUM_COMPLETE,
 	NETDEV_A_QSTATS_RX_CSUM_UNNECESSARY,
 	NETDEV_A_QSTATS_RX_CSUM_NONE,
 	NETDEV_A_QSTATS_RX_CSUM_BAD,
-- 
2.45.1