Commit 51df4865 authored by Roberto Sassu's avatar Roberto Sassu Committed by Alexei Starovoitov
Browse files

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: default avatarRoberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: default avatarJoanne Koong <joannelkoong@gmail.com>
Acked-by: default avatarKP Singh <kpsingh@kernel.org>
Acked-by: default avatarKumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20220920075951.929132-6-roberto.sassu@huaweicloud.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent b8d31762

include/linux/bpf.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

kernel/bpf/helpers.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

}