130 lines · c
1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */3 4#include "vmlinux.h"5#include <bpf/bpf_helpers.h>6#include "bpf_misc.h"7 8struct bpf_iter_testmod_seq {9 u64 :64;10 u64 :64;11};12 13extern int bpf_iter_testmod_seq_new(struct bpf_iter_testmod_seq *it, s64 value, int cnt) __ksym;14extern s64 *bpf_iter_testmod_seq_next(struct bpf_iter_testmod_seq *it) __ksym;15extern s64 bpf_iter_testmod_seq_value(int blah, struct bpf_iter_testmod_seq *it) __ksym;16extern void bpf_iter_testmod_seq_destroy(struct bpf_iter_testmod_seq *it) __ksym;17 18const volatile __s64 exp_empty = 0 + 1;19__s64 res_empty;20 21SEC("raw_tp/sys_enter")22__success __log_level(2)23__msg("fp-16_w=iter_testmod_seq(ref_id=1,state=active,depth=0)")24__msg("fp-16=iter_testmod_seq(ref_id=1,state=drained,depth=0)")25__msg("call bpf_iter_testmod_seq_destroy")26int testmod_seq_empty(const void *ctx)27{28 __s64 sum = 0, *i;29 30 bpf_for_each(testmod_seq, i, 1000, 0) sum += *i;31 res_empty = 1 + sum;32 33 return 0;34}35 36const volatile __s64 exp_full = 1000000;37__s64 res_full;38 39SEC("raw_tp/sys_enter")40__success __log_level(2)41__msg("fp-16_w=iter_testmod_seq(ref_id=1,state=active,depth=0)")42__msg("fp-16=iter_testmod_seq(ref_id=1,state=drained,depth=0)")43__msg("call bpf_iter_testmod_seq_destroy")44int testmod_seq_full(const void *ctx)45{46 __s64 sum = 0, *i;47 48 bpf_for_each(testmod_seq, i, 1000, 1000) sum += *i;49 res_full = sum;50 51 return 0;52}53 54const volatile __s64 exp_truncated = 10 * 1000000;55__s64 res_truncated;56 57static volatile int zero = 0;58 59SEC("raw_tp/sys_enter")60__success __log_level(2)61__msg("fp-16_w=iter_testmod_seq(ref_id=1,state=active,depth=0)")62__msg("fp-16=iter_testmod_seq(ref_id=1,state=drained,depth=0)")63__msg("call bpf_iter_testmod_seq_destroy")64int testmod_seq_truncated(const void *ctx)65{66 __s64 sum = 0, *i;67 int cnt = zero;68 69 bpf_for_each(testmod_seq, i, 10, 2000000) {70 sum += *i;71 cnt++;72 if (cnt >= 1000000)73 break;74 }75 res_truncated = sum;76 77 return 0;78}79 80SEC("?raw_tp")81__failure82__msg("expected an initialized iter_testmod_seq as arg #2")83int testmod_seq_getter_before_bad(const void *ctx)84{85 struct bpf_iter_testmod_seq it;86 87 return bpf_iter_testmod_seq_value(0, &it);88}89 90SEC("?raw_tp")91__failure92__msg("expected an initialized iter_testmod_seq as arg #2")93int testmod_seq_getter_after_bad(const void *ctx)94{95 struct bpf_iter_testmod_seq it;96 s64 sum = 0, *v;97 98 bpf_iter_testmod_seq_new(&it, 100, 100);99 100 while ((v = bpf_iter_testmod_seq_next(&it))) {101 sum += *v;102 }103 104 bpf_iter_testmod_seq_destroy(&it);105 106 return sum + bpf_iter_testmod_seq_value(0, &it);107}108 109SEC("?socket")110__success __retval(1000000)111int testmod_seq_getter_good(const void *ctx)112{113 struct bpf_iter_testmod_seq it;114 s64 sum = 0, *v;115 116 bpf_iter_testmod_seq_new(&it, 100, 100);117 118 while ((v = bpf_iter_testmod_seq_next(&it))) {119 sum += *v;120 }121 122 sum *= bpf_iter_testmod_seq_value(0, &it);123 124 bpf_iter_testmod_seq_destroy(&it);125 126 return sum;127}128 129char _license[] SEC("license") = "GPL";130