unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

bpf: Disable bh in bpf_test_run for xdp and tc prog

Browse source 
Some of the bpf helpers require bh disabled. eg. The bpf_fib_lookup
helper that will be used in a latter selftest. In particular, it
calls ___neigh_lookup_noref that expects the bh disabled.

This patch disables bh before calling bpf_prog_run[_xdp], so
the testing prog can also use those helpers.

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230217004150.2980689-2-martin.lau@linux.dev
This commit is contained in:
Martin KaFai Lau 2023-02-16 16:41:47 -08:00 committed by Daniel Borkmann
parent 1596dae2f1
commit af2d0d09ea
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
net/bpf/test_run.c
View file

@ -413,10 +413,12 @@ static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
old_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
do {
run_ctx.prog_item = &item;
local_bh_disable();
if (xdp)
*retval = bpf_prog_run_xdp(prog, ctx);
else
*retval = bpf_prog_run(prog, ctx);
local_bh_enable();
} while (bpf_test_timer_continue(&t, 1, repeat, &ret, time));
bpf_reset_run_ctx(old_ctx);
bpf_test_timer_leave(&t);