On 1/24/23 8:08 AM, David Vernet wrote:
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 50123afab9bf..64034311c5f7 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1474,6 +1474,7 @@ struct bpf_dummy_ops {
int (*test_1)(struct bpf_dummy_ops_state *cb);
int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2,
char a3, unsigned long a4);
+ int (*test_3)(struct bpf_dummy_ops_state *cb);
nit. May be a self describe name like test_sleepable().
};
int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr,
diff --git a/net/bpf/bpf_dummy_struct_ops.c b/net/bpf/bpf_dummy_struct_ops.c
index 1ac4467928a9..46099737d1da 100644
--- a/net/bpf/bpf_dummy_struct_ops.c
+++ b/net/bpf/bpf_dummy_struct_ops.c
@@ -154,6 +154,23 @@ static bool bpf_dummy_ops_is_valid_access(int off, int size,
return bpf_tracing_btf_ctx_access(off, size, type, prog, info);
}
+static int bpf_dummy_ops_check_member(const struct btf_type *t,
+ const struct btf_member *member,
+ const struct bpf_prog *prog)
+{
+ u32 moff = __btf_member_bit_offset(t, member) / 8;
+
+ switch (moff) {
+ case offsetof(struct bpf_dummy_ops, test_3):
+ break;
+ default:
+ if (prog->aux->sleepable)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int bpf_dummy_ops_btf_struct_access(struct bpf_verifier_log *log,
const struct bpf_reg_state *reg,
int off, int size, enum bpf_access_type atype,
@@ -208,6 +225,7 @@ static void bpf_dummy_unreg(void *kdata)
struct bpf_struct_ops bpf_bpf_dummy_ops = {
.verifier_ops = &bpf_dummy_verifier_ops,
.init = bpf_dummy_init,
+ .check_member = bpf_dummy_ops_check_member,
.init_member = bpf_dummy_init_member,
.reg = bpf_dummy_reg,
.unreg = bpf_dummy_unreg,
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 8da0d73b368e..33ea57d34c0b 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -730,6 +730,10 @@ noinline void bpf_kfunc_call_test_destructive(void)
{
}
+noinline void bpf_kfunc_call_test_sleepable(void)
+{
+}
+
__diag_pop();
BTF_SET8_START(bpf_test_modify_return_ids)
@@ -767,6 +771,7 @@ BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail1)
BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail2)
BTF_ID_FLAGS(func, bpf_kfunc_call_test_ref, KF_TRUSTED_ARGS)
BTF_ID_FLAGS(func, bpf_kfunc_call_test_destructive, KF_DESTRUCTIVE)
+BTF_ID_FLAGS(func, bpf_kfunc_call_test_sleepable, KF_SLEEPABLE)
KF_SLEEPABLE kfunc is not specific to the struct_ops prog. I hope a test has
already covered that KF_SLEEPABLE kfunc can only be called from sleepable prog.
eg. there is bpf_fentry_test1.
This new kfunc could then be omitted and make the test simpler. There is no need
to add the test to the DENYLIST.s390x:
https://github.com/kernel-patches/bpf/actions/runs/3998188872/jobs/6861920516
diff --git a/tools/testing/selftests/bpf/progs/dummy_st_ops_common.h b/tools/testing/selftests/bpf/progs/dummy_st_ops_common.h
new file mode 100644
index 000000000000..7d0761594b69
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/dummy_st_ops_common.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
+
+#ifndef _DUMMY_ST_OPS_COMMON_H
+#define _DUMMY_ST_OPS_COMMON_H
+
+struct bpf_dummy_ops_state {
+ int val;
+} __attribute__((preserve_access_index));
+
+struct bpf_dummy_ops {
+ int (*test_1)(struct bpf_dummy_ops_state *state);
+ int (*test_2)(struct bpf_dummy_ops_state *state, int a1, unsigned short a2,
+ char a3, unsigned long a4);
+ int (*test_3)(struct bpf_dummy_ops_state *state);
+};
Instead of adding a new dummy_st_ops_common.h header, try to directly include
vmlinux.h in the dummy_st_ops_{success,fail}.c.
+
+void bpf_kfunc_call_test_sleepable(void) __ksym;
