[PATCH net-next] netlink: specs: netdev: update doc for xsk tx-checksum and zc-max-segs
From: Jakub Kicinski <kuba@kernel.org>
Date: 2026-09-16 02:16:34
Also in:
bpf
Subsystem:
networking drivers, networking [general], the rest, yaml netlink (ynl) · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Donald Hunter
Minor touch ups to the XSK-related doc strings in the netdev spec. Tx checksum is (obviously?) Layer 4 (TCP/UDP), not Layer 3 (IP). The xdp_zc_max_segs change is more subtle, I guess, but to kernel devs saying "frags" may sound like the number of skb frags. The value includes the head in this case. The default of 1 means single buffer, XDP_USE_SG sockets are refused when it is 1. Let's use the word "buffer" instead of "frag". Signed-off-by: Jakub Kicinski <kuba@kernel.org> --- CC: donald.hunter@gmail.com CC: ast@kernel.org CC: daniel@iogearbox.net CC: hawk@kernel.org CC: john.fastabend@gmail.com CC: sdf@fomichev.me CC: razor@blackwall.org CC: dw@davidwei.uk CC: bpf@vger.kernel.org --- Documentation/netlink/specs/netdev.yaml | 5 +++-- include/uapi/linux/netdev.h | 2 +- tools/include/uapi/linux/netdev.h | 2 +- 3 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml
index 3e3f03bd5c29..e13461cf3fc3 100644
--- a/Documentation/netlink/specs/netdev.yaml
+++ b/Documentation/netlink/specs/netdev.yaml@@ -80,7 +80,7 @@ doc: >- - name: tx-checksum doc: >- - L3 checksum HW offload is supported by the driver. + L4 checksum HW offload is supported by the driver. - name: tx-launch-time-fifo doc: >-
@@ -118,7 +118,8 @@ doc: >- enum: xdp-act - name: xdp-zc-max-segs - doc: max fragment count supported by ZC driver + doc: max buffer count per packet supported by ZC driver, + including the head buffer type: u32 checks: min: 1
diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h
index 35ff083221c7..9026e0414fbe 100644
--- a/include/uapi/linux/netdev.h
+++ b/include/uapi/linux/netdev.h@@ -58,7 +58,7 @@ enum netdev_xdp_rx_metadata { * enum netdev_xsk_flags * @NETDEV_XSK_FLAGS_TX_TIMESTAMP: HW timestamping egress packets is supported * by the driver. - * @NETDEV_XSK_FLAGS_TX_CHECKSUM: L3 checksum HW offload is supported by the + * @NETDEV_XSK_FLAGS_TX_CHECKSUM: L4 checksum HW offload is supported by the * driver. * @NETDEV_XSK_FLAGS_TX_LAUNCH_TIME_FIFO: Launch time HW offload is supported * by the driver.
diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h
index 35ff083221c7..9026e0414fbe 100644
--- a/tools/include/uapi/linux/netdev.h
+++ b/tools/include/uapi/linux/netdev.h@@ -58,7 +58,7 @@ enum netdev_xdp_rx_metadata { * enum netdev_xsk_flags * @NETDEV_XSK_FLAGS_TX_TIMESTAMP: HW timestamping egress packets is supported * by the driver. - * @NETDEV_XSK_FLAGS_TX_CHECKSUM: L3 checksum HW offload is supported by the + * @NETDEV_XSK_FLAGS_TX_CHECKSUM: L4 checksum HW offload is supported by the * driver. * @NETDEV_XSK_FLAGS_TX_LAUNCH_TIME_FIFO: Launch time HW offload is supported * by the driver.
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2.55.0