From: Zhangjin Wu Date: Fri, 7 Jul 2023 18:37:45 +0000 (+0800) Subject: selftests/nolibc: fix up failures when CONFIG_PROC_FS=n X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b8b26108e4d5a0d004393e8a53d374b2b076ba20;p=linux.git selftests/nolibc: fix up failures when CONFIG_PROC_FS=n For CONFIG_PROC_FS=n, the /proc is not mountable, but the /proc directory has been created in the prepare() stage whenever /proc is there or not. so, the checking of /proc in the run_syscall() stage will be always true and at last it will fail all of the procfs dependent test cases, which deviates from the 'cond' check design of the EXPECT_xx macros, without procfs, these test cases should be skipped instead of failed. To solve this issue, one method is checking /proc/self instead of /proc, another method is removing the /proc directory completely for CONFIG_PROC_FS=n, we apply the second method to avoid misleading the users. Reviewed-by: Thomas Weißschuh Signed-off-by: Zhangjin Wu Signed-off-by: Willy Tarreau --- diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index bb39a1e7fd464..55cc2296c292b 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -1057,8 +1057,11 @@ int prepare(void) /* try to mount /proc if not mounted. Silently fail otherwise */ if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) { - if (stat("/proc/self", &stat_buf) != 0) - mount("/proc", "/proc", "proc", 0, 0); + if (stat("/proc/self", &stat_buf) != 0) { + /* If not mountable, remove /proc completely to avoid misuse */ + if (mount("none", "/proc", "proc", 0, 0) != 0) + rmdir("/proc"); + } } return 0;