From 44481e4925327d833f2e37c8741406e4cabfe054 Mon Sep 17 00:00:00 2001 From: Anton Protopopov Date: Sun, 19 Oct 2025 20:21:31 +0000 Subject: bpf: generalize and export map_get_next_key for arrays The kernel/bpf/array.c file defines the array_map_get_next_key() function which finds the next key for array maps. It actually doesn't use any map fields besides the generic max_entries field. Generalize it, and export as bpf_array_get_next_key() such that it can be re-used by other array-like maps. Signed-off-by: Anton Protopopov Acked-by: Eduard Zingerman Link: https://lore.kernel.org/r/20251019202145.3944697-4-a.s.protopopov@gmail.com Signed-off-by: Alexei Starovoitov --- include/linux/bpf.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 3bda915cd7a8..e53cda0aabb6 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2107,6 +2107,12 @@ struct bpf_array { }; }; +/* + * The bpf_array_get_next_key() function may be used for all array-like + * maps, i.e., maps with u32 keys with range [0 ,..., max_entries) + */ +int bpf_array_get_next_key(struct bpf_map *map, void *key, void *next_key); + #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ #define MAX_TAIL_CALL_CNT 33 -- cgit v1.2.3