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netlink: specs: netdev: update doc for xsk tx-checksum and zc-max-segs

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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".

Link: https://patch.msgid.link/20260916021608.1702731-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2026-09-15 19:16:08 -07:00
parent f2b5c73c03
commit 8050e0efd4
3 changed files with 5 additions and 4 deletions
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5
Documentation/netlink/specs/netdev.yaml
View File

@ -80,7 +80,7 @@ definitions:
-
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 @@ attribute-sets:
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

2
include/uapi/linux/netdev.h
View File

@ -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.

2
tools/include/uapi/linux/netdev.h
View File

@ -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.