diff options
Diffstat (limited to 'tools/testing/selftests/bpf/test_current_pid_tgid_new_ns.c')
-rw-r--r-- | tools/testing/selftests/bpf/test_current_pid_tgid_new_ns.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/tools/testing/selftests/bpf/test_current_pid_tgid_new_ns.c b/tools/testing/selftests/bpf/test_current_pid_tgid_new_ns.c deleted file mode 100644 index ec53b1ef90d2..000000000000 --- a/tools/testing/selftests/bpf/test_current_pid_tgid_new_ns.c +++ /dev/null @@ -1,160 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (c) 2020 Carlos Neira cneirabustos@gmail.com */ -#define _GNU_SOURCE -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> -#include <sys/syscall.h> -#include <sched.h> -#include <sys/wait.h> -#include <sys/mount.h> -#include "test_progs.h" - -#define CHECK_NEWNS(condition, tag, format...) ({ \ - int __ret = !!(condition); \ - if (__ret) { \ - printf("%s:FAIL:%s ", __func__, tag); \ - printf(format); \ - } else { \ - printf("%s:PASS:%s\n", __func__, tag); \ - } \ - __ret; \ -}) - -struct bss { - __u64 dev; - __u64 ino; - __u64 pid_tgid; - __u64 user_pid_tgid; -}; - -int main(int argc, char **argv) -{ - pid_t pid; - int exit_code = 1; - struct stat st; - - printf("Testing bpf_get_ns_current_pid_tgid helper in new ns\n"); - - if (stat("/proc/self/ns/pid", &st)) { - perror("stat failed on /proc/self/ns/pid ns\n"); - printf("%s:FAILED\n", argv[0]); - return exit_code; - } - - if (CHECK_NEWNS(unshare(CLONE_NEWPID | CLONE_NEWNS), - "unshare CLONE_NEWPID | CLONE_NEWNS", "error errno=%d\n", errno)) - return exit_code; - - pid = fork(); - if (pid == -1) { - perror("Fork() failed\n"); - printf("%s:FAILED\n", argv[0]); - return exit_code; - } - - if (pid > 0) { - int status; - - usleep(5); - waitpid(pid, &status, 0); - return 0; - } else { - - pid = fork(); - if (pid == -1) { - perror("Fork() failed\n"); - printf("%s:FAILED\n", argv[0]); - return exit_code; - } - - if (pid > 0) { - int status; - waitpid(pid, &status, 0); - return 0; - } else { - if (CHECK_NEWNS(mount("none", "/proc", NULL, MS_PRIVATE|MS_REC, NULL), - "Unmounting proc", "Cannot umount proc! errno=%d\n", errno)) - return exit_code; - - if (CHECK_NEWNS(mount("proc", "/proc", "proc", MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL), - "Mounting proc", "Cannot mount proc! errno=%d\n", errno)) - return exit_code; - - const char *probe_name = "raw_tracepoint/sys_enter"; - const char *file = "test_ns_current_pid_tgid.o"; - struct bpf_link *link = NULL; - struct bpf_program *prog; - struct bpf_map *bss_map; - struct bpf_object *obj; - int exit_code = 1; - int err, key = 0; - struct bss bss; - struct stat st; - __u64 id; - - obj = bpf_object__open_file(file, NULL); - if (CHECK_NEWNS(IS_ERR(obj), "obj_open", "err %ld\n", PTR_ERR(obj))) - return exit_code; - - err = bpf_object__load(obj); - if (CHECK_NEWNS(err, "obj_load", "err %d errno %d\n", err, errno)) - goto cleanup; - - bss_map = bpf_object__find_map_by_name(obj, "test_ns_.bss"); - if (CHECK_NEWNS(!bss_map, "find_bss_map", "failed\n")) - goto cleanup; - - prog = bpf_object__find_program_by_title(obj, probe_name); - if (CHECK_NEWNS(!prog, "find_prog", "prog '%s' not found\n", - probe_name)) - goto cleanup; - - memset(&bss, 0, sizeof(bss)); - pid_t tid = syscall(SYS_gettid); - pid_t pid = getpid(); - - id = (__u64) tid << 32 | pid; - bss.user_pid_tgid = id; - - if (CHECK_NEWNS(stat("/proc/self/ns/pid", &st), - "stat new ns", "Failed to stat /proc/self/ns/pid errno=%d\n", errno)) - goto cleanup; - - bss.dev = st.st_dev; - bss.ino = st.st_ino; - - err = bpf_map_update_elem(bpf_map__fd(bss_map), &key, &bss, 0); - if (CHECK_NEWNS(err, "setting_bss", "failed to set bss : %d\n", err)) - goto cleanup; - - link = bpf_program__attach_raw_tracepoint(prog, "sys_enter"); - if (CHECK_NEWNS(IS_ERR(link), "attach_raw_tp", "err %ld\n", - PTR_ERR(link))) { - link = NULL; - goto cleanup; - } - - /* trigger some syscalls */ - usleep(1); - - err = bpf_map_lookup_elem(bpf_map__fd(bss_map), &key, &bss); - if (CHECK_NEWNS(err, "set_bss", "failed to get bss : %d\n", err)) - goto cleanup; - - if (CHECK_NEWNS(id != bss.pid_tgid, "Compare user pid/tgid vs. bpf pid/tgid", - "User pid/tgid %llu BPF pid/tgid %llu\n", id, bss.pid_tgid)) - goto cleanup; - - exit_code = 0; - printf("%s:PASS\n", argv[0]); -cleanup: - if (!link) { - bpf_link__destroy(link); - link = NULL; - } - bpf_object__close(obj); - } - } - return 0; -} |