diff options
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c deleted file mode 100644 index df3b292a8ffe..000000000000 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c +++ /dev/null @@ -1,140 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (c) 2020 Facebook */ -#include <linux/btf.h> -#include <linux/btf_ids.h> -#include <linux/error-injection.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/percpu-defs.h> -#include <linux/sysfs.h> -#include <linux/tracepoint.h> -#include "bpf_testmod.h" - -#define CREATE_TRACE_POINTS -#include "bpf_testmod-events.h" - -DEFINE_PER_CPU(int, bpf_testmod_ksym_percpu) = 123; - -noinline void -bpf_testmod_test_mod_kfunc(int i) -{ - *(int *)this_cpu_ptr(&bpf_testmod_ksym_percpu) = i; -} - -noinline int bpf_testmod_loop_test(int n) -{ - int i, sum = 0; - - /* the primary goal of this test is to test LBR. Create a lot of - * branches in the function, so we can catch it easily. - */ - for (i = 0; i < n; i++) - sum += i; - return sum; -} - -__weak noinline struct file *bpf_testmod_return_ptr(int arg) -{ - static struct file f = {}; - - switch (arg) { - case 1: return (void *)EINVAL; /* user addr */ - case 2: return (void *)0xcafe4a11; /* user addr */ - case 3: return (void *)-EINVAL; /* canonical, but invalid */ - case 4: return (void *)(1ull << 60); /* non-canonical and invalid */ - case 5: return (void *)~(1ull << 30); /* trigger extable */ - case 6: return &f; /* valid addr */ - case 7: return (void *)((long)&f | 1); /* kernel tricks */ - default: return NULL; - } -} - -noinline ssize_t -bpf_testmod_test_read(struct file *file, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t len) -{ - struct bpf_testmod_test_read_ctx ctx = { - .buf = buf, - .off = off, - .len = len, - }; - int i = 1; - - while (bpf_testmod_return_ptr(i)) - i++; - - /* This is always true. Use the check to make sure the compiler - * doesn't remove bpf_testmod_loop_test. - */ - if (bpf_testmod_loop_test(101) > 100) - trace_bpf_testmod_test_read(current, &ctx); - - /* Magic number to enable writable tp */ - if (len == 64) { - struct bpf_testmod_test_writable_ctx writable = { - .val = 1024, - }; - trace_bpf_testmod_test_writable_bare(&writable); - if (writable.early_ret) - return snprintf(buf, len, "%d\n", writable.val); - } - - return -EIO; /* always fail */ -} -EXPORT_SYMBOL(bpf_testmod_test_read); -ALLOW_ERROR_INJECTION(bpf_testmod_test_read, ERRNO); - -noinline ssize_t -bpf_testmod_test_write(struct file *file, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t len) -{ - struct bpf_testmod_test_write_ctx ctx = { - .buf = buf, - .off = off, - .len = len, - }; - - trace_bpf_testmod_test_write_bare(current, &ctx); - - return -EIO; /* always fail */ -} -EXPORT_SYMBOL(bpf_testmod_test_write); -ALLOW_ERROR_INJECTION(bpf_testmod_test_write, ERRNO); - -static struct bin_attribute bin_attr_bpf_testmod_file __ro_after_init = { - .attr = { .name = "bpf_testmod", .mode = 0666, }, - .read = bpf_testmod_test_read, - .write = bpf_testmod_test_write, -}; - -BTF_SET_START(bpf_testmod_kfunc_ids) -BTF_ID(func, bpf_testmod_test_mod_kfunc) -BTF_SET_END(bpf_testmod_kfunc_ids) - -static DEFINE_KFUNC_BTF_ID_SET(&bpf_testmod_kfunc_ids, bpf_testmod_kfunc_btf_set); - -static int bpf_testmod_init(void) -{ - int ret; - - ret = sysfs_create_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); - if (ret) - return ret; - register_kfunc_btf_id_set(&prog_test_kfunc_list, &bpf_testmod_kfunc_btf_set); - return 0; -} - -static void bpf_testmod_exit(void) -{ - unregister_kfunc_btf_id_set(&prog_test_kfunc_list, &bpf_testmod_kfunc_btf_set); - return sysfs_remove_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); -} - -module_init(bpf_testmod_init); -module_exit(bpf_testmod_exit); - -MODULE_AUTHOR("Andrii Nakryiko"); -MODULE_DESCRIPTION("BPF selftests module"); -MODULE_LICENSE("Dual BSD/GPL"); |
