[PATCH net-next 1/3] xsk: align TX metadata layout across ABIs
From: Stanislav Fomichev <hidden>
Date: 2026-08-10 18:47:55
Also in:
bpf, intel-wired-lan, linux-arm-kernel, linux-rdma, lkml
Subsystem:
networking drivers, the rest, xdp sockets (af_xdp) · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Magnus Karlsson, Maciej Fijalkowski
Add explicit padding before launch_time so xsk_tx_metadata has the same
layout on 32-bit and 64-bit systems. This intentionally replaces the
incompatible 32-bit launch-time layout while the interface is still new.
Fixes: ca4419f15abd ("xsk: Add launch time hardware offload support to XDP Tx metadata")
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
---
include/uapi/linux/if_xdp.h | 1 +
tools/include/uapi/linux/if_xdp.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/include/uapi/linux/if_xdp.h b/include/uapi/linux/if_xdp.h
index 23a062781468..50d67df78911 100644
--- a/include/uapi/linux/if_xdp.h
+++ b/include/uapi/linux/if_xdp.h@@ -149,6 +149,7 @@ struct xsk_tx_metadata { __u16 csum_start; /* Offset from csum_start where checksum should be stored. */ __u16 csum_offset; + __u32 reserved; /* XDP_TXMD_FLAGS_LAUNCH_TIME */ /* Launch time in nanosecond against the PTP HW Clock */
diff --git a/tools/include/uapi/linux/if_xdp.h b/tools/include/uapi/linux/if_xdp.h
index 23a062781468..50d67df78911 100644
--- a/tools/include/uapi/linux/if_xdp.h
+++ b/tools/include/uapi/linux/if_xdp.h@@ -149,6 +149,7 @@ struct xsk_tx_metadata { __u16 csum_start; /* Offset from csum_start where checksum should be stored. */ __u16 csum_offset; + __u32 reserved; /* XDP_TXMD_FLAGS_LAUNCH_TIME */ /* Launch time in nanosecond against the PTP HW Clock */
--
2.53.0-Meta