6aed15e330
kfuncs are allowed to be static, or not use one or more of their arguments. For example, bpf_xdp_metadata_rx_hash() in net/core/xdp.c is meant to be implemented by drivers, with the default implementation just returning -EOPNOTSUPP. As described in [0], such kfuncs can have their arguments elided, which can cause BTF encoding to be skipped. The new __bpf_kfunc macro should address this, and this patch adds a selftest which verifies that a static kfunc with at least one unused argument can still be encoded and invoked by a BPF program. Signed-off-by: David Vernet <void@manifault.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20230201173016.342758-5-void@manifault.com |
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.. | ||
accounting | ||
arch | ||
bootconfig | ||
bpf | ||
build | ||
certs | ||
cgroup | ||
counter | ||
debugging | ||
edid | ||
firewire | ||
firmware | ||
gpio | ||
hv | ||
iio | ||
include | ||
io_uring | ||
kvm/kvm_stat | ||
laptop | ||
leds | ||
lib | ||
memory-model | ||
net/ynl | ||
objtool | ||
pci | ||
pcmcia | ||
perf | ||
power | ||
rcu | ||
scripts | ||
spi | ||
testing | ||
thermal | ||
time | ||
tracing | ||
usb | ||
verification | ||
virtio | ||
vm | ||
wmi | ||
Makefile |