From 51df4865718540f51bb5d3e552c50dc88e1333d6 Mon Sep 17 00:00:00 2001 From: Roberto Sassu Date: Tue, 20 Sep 2022 09:59:43 +0200 Subject: [PATCH] bpf: Export bpf_dynptr_get_size() Export bpf_dynptr_get_size(), so that kernel code dealing with eBPF dynamic pointers can obtain the real size of data carried by this data structure. Signed-off-by: Roberto Sassu Reviewed-by: Joanne Koong Acked-by: KP Singh Acked-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20220920075951.929132-6-roberto.sassu@huaweicloud.com Signed-off-by: Alexei Starovoitov --- include/linux/bpf.h | 1 + kernel/bpf/helpers.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 33e543b..6535fb1 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2654,6 +2654,7 @@ void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, enum bpf_dynptr_type type, u32 offset, u32 size); void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr); int bpf_dynptr_check_size(u32 size); +u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr); #ifdef CONFIG_BPF_LSM void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype); diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 6d69e30..b069517 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1408,7 +1408,7 @@ static void bpf_dynptr_set_type(struct bpf_dynptr_kern *ptr, enum bpf_dynptr_typ ptr->size |= type << DYNPTR_TYPE_SHIFT; } -static u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr) +u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr) { return ptr->size & DYNPTR_SIZE_MASK; } -- 2.7.4