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| author | Namhyung Kim <namhyung@kernel.org> | 2024-10-30 23:28:18 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-11-01 19:08:32 +0100 |
| commit | 2e9a548009c2d804e55cdd5b0e9903756cf7d9b3 (patch) | |
| tree | fed0fee837e2a98507d9d178e122b99a40863fec /kernel/bpf/helpers.c | |
| parent | selftests/bpf: drop unnecessary bpf_iter.h type duplication (diff) | |
| download | linux-2e9a548009c2d804e55cdd5b0e9903756cf7d9b3.tar.xz linux-2e9a548009c2d804e55cdd5b0e9903756cf7d9b3.zip | |
bpf: Add open coded version of kmem_cache iterator
Add a new open coded iterator for kmem_cache which can be called from a
BPF program like below. It doesn't take any argument and traverses all
kmem_cache entries.
struct kmem_cache *pos;
bpf_for_each(kmem_cache, pos) {
...
}
As it needs to grab slab_mutex, it should be called from sleepable BPF
programs only.
Also update the existing iterator code to use the open coded version
internally as suggested by Andrii.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20241030222819.1800667-1-namhyung@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 2e82f8d3a76f..395221e53832 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -3112,6 +3112,9 @@ BTF_ID_FLAGS(func, bpf_iter_bits_next, KF_ITER_NEXT | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_iter_bits_destroy, KF_ITER_DESTROY) BTF_ID_FLAGS(func, bpf_copy_from_user_str, KF_SLEEPABLE) BTF_ID_FLAGS(func, bpf_get_kmem_cache) +BTF_ID_FLAGS(func, bpf_iter_kmem_cache_new, KF_ITER_NEW | KF_SLEEPABLE) +BTF_ID_FLAGS(func, bpf_iter_kmem_cache_next, KF_ITER_NEXT | KF_RET_NULL | KF_SLEEPABLE) +BTF_ID_FLAGS(func, bpf_iter_kmem_cache_destroy, KF_ITER_DESTROY | KF_SLEEPABLE) BTF_KFUNCS_END(common_btf_ids) static const struct btf_kfunc_id_set common_kfunc_set = { |