diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/preempt_lock.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/preempt_lock.c | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/preempt_lock.c b/tools/testing/selftests/bpf/progs/preempt_lock.c index 6c5797bf0ead..7d04254e61f1 100644 --- a/tools/testing/selftests/bpf/progs/preempt_lock.c +++ b/tools/testing/selftests/bpf/progs/preempt_lock.c @@ -134,7 +134,7 @@ int __noinline preempt_global_subprog(void) } SEC("?tc") -__failure __msg("global function calls are not allowed with preemption disabled") +__success int preempt_global_subprog_test(struct __sk_buff *ctx) { preempt_disable(); @@ -143,4 +143,70 @@ int preempt_global_subprog_test(struct __sk_buff *ctx) return 0; } +int __noinline +global_subprog(int i) +{ + if (i) + bpf_printk("%p", &i); + return i; +} + +int __noinline +global_sleepable_helper_subprog(int i) +{ + if (i) + bpf_copy_from_user(&i, sizeof(i), NULL); + return i; +} + +int __noinline +global_sleepable_kfunc_subprog(int i) +{ + if (i) + bpf_copy_from_user_str(&i, sizeof(i), NULL, 0); + global_subprog(i); + return i; +} + +int __noinline +global_subprog_calling_sleepable_global(int i) +{ + if (!i) + global_sleepable_kfunc_subprog(i); + return i; +} + +SEC("?syscall") +__failure __msg("global functions that may sleep are not allowed in non-sleepable context") +int preempt_global_sleepable_helper_subprog(struct __sk_buff *ctx) +{ + preempt_disable(); + if (ctx->mark) + global_sleepable_helper_subprog(ctx->mark); + preempt_enable(); + return 0; +} + +SEC("?syscall") +__failure __msg("global functions that may sleep are not allowed in non-sleepable context") +int preempt_global_sleepable_kfunc_subprog(struct __sk_buff *ctx) +{ + preempt_disable(); + if (ctx->mark) + global_sleepable_kfunc_subprog(ctx->mark); + preempt_enable(); + return 0; +} + +SEC("?syscall") +__failure __msg("global functions that may sleep are not allowed in non-sleepable context") +int preempt_global_sleepable_subprog_indirect(struct __sk_buff *ctx) +{ + preempt_disable(); + if (ctx->mark) + global_subprog_calling_sleepable_global(ctx->mark); + preempt_enable(); + return 0; +} + char _license[] SEC("license") = "GPL"; |