diff options
author | Anton Protopopov <aspsk@isovalent.com> | 2023-07-19 12:29:52 +0300 |
---|---|---|
committer | Alexei Starovoitov <ast@kernel.org> | 2023-07-19 19:48:53 +0300 |
commit | 72829b1c1f1601015cd7332b968befcf5e636c24 (patch) | |
tree | 591c3e53fbc4e755d8886eb178fe8e75cedc006c /kernel/bpf | |
parent | 9c29804961c1bbf5c879a1879fe5fcac6364736f (diff) | |
download | linux-72829b1c1f1601015cd7332b968befcf5e636c24.tar.xz |
bpf: allow any program to use the bpf_map_sum_elem_count kfunc
Register the bpf_map_sum_elem_count func for all programs, and update the
map_ptr subtest of the test_progs test to test the new functionality.
The usage is allowed as long as the pointer to the map is trusted (when
using tracing programs) or is a const pointer to map, as in the following
example:
struct {
__uint(type, BPF_MAP_TYPE_HASH);
...
} hash SEC(".maps");
...
static inline int some_bpf_prog(void)
{
struct bpf_map *map = (struct bpf_map *)&hash;
__s64 count;
count = bpf_map_sum_elem_count(map);
...
}
Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
Link: https://lore.kernel.org/r/20230719092952.41202-5-aspsk@isovalent.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf')
-rw-r--r-- | kernel/bpf/map_iter.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/map_iter.c b/kernel/bpf/map_iter.c index 011adb41858e..6fc9dae9edc8 100644 --- a/kernel/bpf/map_iter.c +++ b/kernel/bpf/map_iter.c @@ -226,6 +226,6 @@ static const struct btf_kfunc_id_set bpf_map_iter_kfunc_set = { static int init_subsystem(void) { - return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_map_iter_kfunc_set); + return register_btf_kfunc_id_set(BPF_PROG_TYPE_UNSPEC, &bpf_map_iter_kfunc_set); } late_initcall(init_subsystem); |