Re: [LTP] [PATCH 12/13] Add/Port unshare01 test for unshare() syscall

Subrata Modak
2009-05-29T12:57:21Z

On Wed, 2009-05-27 at 15:42 +0530, Manas Kumar Nayak wrote:
> Signed-off-by: Manas Kumar Nayak <maknayak@in.ibm.com>

Thanks.

Regards--
Subrata

> To: LTP List <ltp-list@lists.sourceforge.net>
> Cc: Subrata Modak <subrata@linux.vnet.ibm.com>
> Cc: Masatake YAMATO <yamato@redhat.com>
> ---
>
> --- ltp-intermediate-20090521.orig/testcases/kernel/syscalls/unshare/Makefile 1970-01-01 05:30:00.000000000 +0530
> +++ ltp-intermediate-20090521/testcases/kernel/syscalls/unshare/Makefile 2009-05-25 15:12:47.000000000 +0530
> @@ -0,0 +1,31 @@
> +#
> +# Copyright (c) International Business Machines Corp., 2009
> +#
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
> +# the GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write to the Free Software
> +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
> +#
> +
> +CFLAGS += -I../../../../include -Wall
> +LDLIBS += -L../../../../lib -lltp
> +
> +SRCS = $(wildcard *.c)
> +TARGETS = $(patsubst %.c,%,$(SRCS))
> +
> +all: $(TARGETS)
> +
> +install:
> + @set -e; for i in $(TARGETS); do ln -f $$i ../../../bin/$$i ; done
> +
> +clean:
> + rm -f $(TARGETS)
> --- ltp-intermediate-20090521.orig/testcases/kernel/syscalls/unshare/unshare01.c 1970-01-01 05:30:00.000000000 +0530
> +++ ltp-intermediate-20090521/testcases/kernel/syscalls/unshare/unshare01.c 2009-05-27 14:43:04.000000000 +0530
> @@ -0,0 +1,231 @@
> +/********************************************************************************/
> +/* Copyright (c) Crackerjack Project., 2007 */
> +/* */
> +/* This program is free software; you can redistribute it and/or modify */
> +/* it under the terms of the GNU General Public License as published by */
> +/* the Free Software Foundation; either version 2 of the License, or */
> +/* (at your option) any later version. */
> +/* */
> +/* This program is distributed in the hope that it will be useful, */
> +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
> +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
> +/* the GNU General Public License for more details. */
> +/* */
> +/* You should have received a copy of the GNU General Public License */
> +/* along with this program; if not, write to the Free Software */
> +/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
> +/* */
> +/****************************************************************************** */
> +/****************************************************************************** */
> +/* */
> +/* File: unshare01.c */
> +/* */
> +/* Description: This tests the unshare() syscall. */
> +/* unshare() allows a process to disassociate parts of its */
> +/* execution context that are currently being shared with other */
> +/* processes. Part of the execution context, such as the namespace */
> +/* ,is shared implicitly when a new process is created using */
> +/* fork(2) or vfork(2), while other parts, such as virtual memory */
> +/* , may be shared by explicit request when creating a process */
> +/* using clone(2). */
> +/* */
> +/* The main use of unshare() is to allow a process to control its */
> +/* shared execution context without creating a new process. */
> +/* */
> +/* */
> +/* The flags argument is a bit mask that specifies which parts of */
> +/* the execution context should be unshared. This argument is */
> +/* specified by ORing together zero or more of the following cons- */
> +/* tants: */
> +/* */
> +/* CLONE_FILES: */
> +/* Reverse the effect of the clone(2) CLONE_FILES flag. */
> +/* Unshare the file descriptor table, so that the calling */
> +/* process no longer shares its file descriptors with any */
> +/* other process. */
> +/* CLONE_FS: */
> +/* Reverse the effect of the clone(2) CLONE_FS flag.Unshare*/
> +/* file system attributes, so that the calling process no */
> +/* longer shares its root directory, current directory, or */
> +/* umask attributes with any other process. */
> +/* CLONE_NEWNS: */
> +/* This flag has the same effect as the clone(2) CLONE_NEWNS*/
> +/* flag. Unshare the namespace, so that the calling process*/
> +/* has a private copy of its namespacei which is not shared*/
> +/* with any other process. Specifying this flag automat- */
> +/* ically implies CLONE_FS as well. */
> +/* */
> +/* If flags is specified as zero, then unshare() is a no-op; no */
> +/* changes are made to the calling process's execution context. */
> +/* */
> +/* Usage: <for command-line> */
> +/* unshare01 [-c n] [-e][-i n] [-I x] [-p x] [-t] */
> +/* where, -c n : Run n copies concurrently. */
> +/* -e : Turn on errno logging. */
> +/* -i n : Execute test n times. */
> +/* -I x : Execute test for x seconds. */
> +/* -P x : Pause for x seconds between iterations. */
> +/* -t : Turn on syscall timing. */
> +/* */
> +/* Total Tests: 1 */
> +/* */
> +/* Test Name: unshare01 */
> +/* History: Porting from Crackerjack to LTP is done by */
> +/* Manas Kumar Nayak maknayak@in.ibm.com> */
> +/********************************************************************************/
> +
> +#include <stdio.h>
> +#include <sys/wait.h>
> +#include <sys/types.h>
> +#include <sched.h>
> +#include <limits.h>
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/syscall.h>
> +#include <errno.h>
> +#include <pwd.h>
> +#include <grp.h>
> +#include <string.h>
> +#include <sys/param.h>
> +#include <stdio.h>
> +
> +/* Harness Specific Include Files. */
> +#include "test.h"
> +#include "usctest.h"
> +#include "linux_syscall_numbers.h"
> +
> +/* Extern Global Variables */
> +extern int Tst_count; /* counter for tst_xxx routines. */
> +extern char *TESTDIR; /* temporary dir created by tst_tmpdir() */
> +
> +/* Global Variables */
> +char *TCID = "unshare01"; /* Test program identifier.*/
> +int testno;
> +int TST_TOTAL =1; /* total number of tests in this file. */
> +
> +/* Extern Global Functions */
> +/******************************************************************************/
> +/* */
> +/* Function: cleanup */
> +/* */
> +/* Description: Performs all one time clean up for this test on successful */
> +/* completion, premature exit or failure. Closes all temporary */
> +/* files, removes all temporary directories exits the test with */
> +/* appropriate TEST_RETURNurn code by calling tst_exit() function. */
> +/* */
> +/* Input: None. */
> +/* */
> +/* Output: None. */
> +/* */
> +/* Return: On failure - Exits calling tst_exit(). Non '0' TEST_RETURNurn code. */
> +/* On success - Exits calling tst_exit(). With '0' TEST_RETURNurn code. */
> +/* */
> +/******************************************************************************/
> +extern void cleanup() {
> + /* Remove tmp dir and all files in it */
> + TEST_CLEANUP;
> + tst_rmdir();
> +
> + /* Exit with appropriate TEST_RETURNurn code. */
> + tst_exit();
> +}
> +
> +/* Local Functions */
> +/******************************************************************************/
> +/* */
> +/* Function: setup */
> +/* */
> +/* Description: Performs all one time setup for this test. This function is */
> +/* typically used to capture signals, create temporary dirs */
> +/* and temporary files that may be used in the course of this */
> +/* test. */
> +/* */
> +/* Input: None. */
> +/* */
> +/* Output: None. */
> +/* */
> +/* Return: On failure - Exits by calling cleanup(). */
> +/* On success - TEST_RETURNurns 0. */
> +/* */
> +/******************************************************************************/
> +void setup() {
> + /* Capture signals if any */
> + /* Create temporary directories */
> + TEST_PAUSE;
> + tst_tmpdir();
> +}
> +
> +int main(int ac, char **av) {
> + pid_t pid1;
> + int lc; /* loop counter */
> + char *msg; /* message TEST_RETURNurned from parse_opts */
> +
> + /* parse standard options */
> + if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
> + tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
> + tst_exit();
> + }
> +
> + setup();
> +
> + /* Check looping state if -i option given */
> + for (lc = 0; TEST_LOOPING(lc); ++lc) {
> + Tst_count = 0;
> + for (testno = 0; testno < TST_TOTAL; ++testno) {
> +
> + /*
> + *fork a child process;testing which one is a child or a parent;
> + * */
> + TEST(pid1=fork()); //call to fork()
> + if (TEST_RETURN == -1){
> + tst_resm(TFAIL, "fork() Failed, errno=%d : %s",TEST_ERRNO, strerror(TEST_ERRNO));
> + cleanup();
> + tst_exit();
> + }else if (TEST_RETURN == 0){
> + if((TEST_RETURN = unshare(CLONE_FILES)) == 0) {
> + tst_resm(TPASS, "unshare with CLONE_FILES call succeeded");
> + tst_exit();
> + }else if (TEST_RETURN == -1 )
> + tst_resm(TFAIL,"unshare Failed, errno=%d : %s",TEST_ERRNO, strerror(TEST_ERRNO));
> + tst_exit();
> + }else{
> + }
> +
> + TEST(pid1=fork()); //call to fork()
> + if (TEST_RETURN == -1){
> + tst_resm(TFAIL, "fork() Failed, errno=%d : %s",TEST_ERRNO, strerror(TEST_ERRNO));
> + cleanup();
> + tst_exit();
> + }else if (TEST_RETURN == 0){
> + if((TEST_RETURN = unshare(CLONE_FS)) == 0) {
> + tst_resm(TPASS, "unshare with CLONE_FS call succeeded");
> + tst_exit();
> + }else if (TEST_RETURN == -1 )
> + tst_resm(TFAIL,"unshare Failed 2, errno=%d : %s",TEST_ERRNO, strerror(TEST_ERRNO));
> + tst_exit();
> + }else{
> + }
> +
> + TEST(pid1=fork()); //call to fork()
> + if (TEST_RETURN == -1){
> + tst_resm(TFAIL, "fork() Failed, errno=%d : %s",TEST_ERRNO, strerror(TEST_ERRNO));
> + cleanup();
> + tst_exit();
> + }else if (TEST_RETURN == 0){
> + if((TEST_RETURN = unshare(CLONE_NEWNS)) == 0) {
> + tst_resm(TPASS, "unshare call with CLONE_NEWNS succeeded");
> + tst_exit();
> + }else if (TEST_RETURN == -1 )
> + tst_resm(TFAIL,"unshare Failed 2, errno=%d : %s",TEST_ERRNO, strerror(TEST_ERRNO));
> + tst_exit();
> + }else{
> + }
> +
> +
> + }
> +
> + }
> + cleanup();
> + tst_exit();
> +}
> +
> --- ltp-intermediate-20090521.orig/runtest/syscalls 2009-05-27 14:45:49.000000000 +0530
> +++ ltp-intermediate-20090521/runtest/syscalls 2009-05-27 14:45:21.000000000 +0530
> @@ -1207,6 +1207,8 @@ unlink08 unlink08
> #unlinkat test cases
> unlinkat01 unlinkat01
>
> +unshare01 unshare01
> +
> #
> # These tests require an unmounted block device
> # to run correctly. Please see individual test
>
> ---
> Regards--
> Manas