Hi Leon, On Sat, Jul 08, 2023 at 12:07:48PM +0800, Leon Hwang wrote: > This series introduces bpf user log to transfer error message from > kernel space to user space when users provide buffer to receive the > error message. > > Especially, when to attach XDP to device, it can transfer the error > message along with errno from dev_xdp_attach() to user space, if error > happens in dev_xdp_attach(). Have you considered adding a tracepoint instead? With some TP_printk() stuff I think you can achieve a similar result without having to do go through changing uapi. > > Leon Hwang (2): > bpf: Introduce bpf generic log > bpf: Introduce bpf user log > > include/linux/bpf.h | 3 ++ > include/uapi/linux/bpf.h | 8 ++++++ > kernel/bpf/log.c | 52 ++++++++++++++++++++++++++++++++++ > net/core/dev.c | 4 ++- > tools/include/uapi/linux/bpf.h | 8 ++++++ > 5 files changed, 74 insertions(+), 1 deletion(-) > > > base-commit: 622f876ab3ced325fe3c2363c6e9c128b7e6c73a > -- > 2.41.0 > > Thanks, Daniel
