From 8f6ddc0587606c4be7ffcbdb20a4a99647e0c362 Mon Sep 17 00:00:00 2001 From: Leon Hwang Date: Tue, 25 Nov 2025 22:58:50 +0800 Subject: bpf: Introduce internal bpf_map_check_op_flags helper function It is to unify map flags checking for lookup_elem, update_elem, lookup_batch and update_batch APIs. Acked-by: Andrii Nakryiko Signed-off-by: Leon Hwang Link: https://lore.kernel.org/r/20251125145857.98134-2-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov --- include/linux/bpf.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include') diff --git a/include/linux/bpf.h b/include/linux/bpf.h index a9b788c7b4aa..6498be4c44f8 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -3829,4 +3829,15 @@ bpf_prog_update_insn_ptrs(struct bpf_prog *prog, u32 *offsets, void *image) } #endif +static inline int bpf_map_check_op_flags(struct bpf_map *map, u64 flags, u64 allowed_flags) +{ + if (flags & ~allowed_flags) + return -EINVAL; + + if ((flags & BPF_F_LOCK) && !btf_record_has_field(map->record, BPF_SPIN_LOCK)) + return -EINVAL; + + return 0; +} + #endif /* _LINUX_BPF_H */ -- cgit v1.2.3