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

Manas Kumar Nayak
2009-05-27T10:12:55Z

Signed-off-by: Manas Kumar Nayak <maknayak@in.ibm.com>
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