Hi! This series is an attempt to make XDP more user friendly by enabling exploiting the recently added netlink extended ACK reporting to carry messages to user space.
David Ahern's iproute2 ext ack patches for ip link are sufficient to show the errors like this: # ip link set dev p4p1 xdp obj ipip_prepend.o sec ".text" Error: nfp: MTU too large w/ XDP enabled Where the message is coming directly from the driver. There could still be a bit of a leap for a complete novice from the message above to the right settings, but it's a big improvement over the standard "Invalid argument" message. v1/non-rfc: - add a separate macro in patch 1; - add KBUILD_MODNAME as part of the message (Daniel); - don't print the error to logs in patch 1. Jakub Kicinski (4): netlink: add NULL-friendly helper for setting extended ACK message xdp: propagate extended ack to XDP setup nfp: make use of extended ack message reporting virtio_net: make use of extended ack message reporting drivers/net/ethernet/netronome/nfp/nfp_net.h | 3 ++- .../net/ethernet/netronome/nfp/nfp_net_common.c | 22 +++++++++++++--------- .../net/ethernet/netronome/nfp/nfp_net_ethtool.c | 4 ++-- drivers/net/virtio_net.c | 11 +++++++---- include/linux/netdevice.h | 10 ++++++++-- include/linux/netlink.h | 8 ++++++++ net/core/dev.c | 5 ++++- net/core/rtnetlink.c | 13 ++++++++----- 8 files changed, 52 insertions(+), 24 deletions(-) -- 2.11.0
