Quoting Veerendra (vee...@linux.vnet.ibm.com):
> Hi
>
>
> Submitting a new testcase on semaphore to test the IPCNS in the
> containers. This patch contains the batch file to run the test on LTP.
>
> In this patch , I am checking the IPCNS functionaity:
> "Semaphore in parent NS is isolated from the container"
>
>
> Changelog:
> Removed the extra semget call in the check_semaphore().
> Corrected the indentation.
>
> Results:
>
> sysvipc: Semaphore none
> sem_nstest 0 INFO : Semaphore namespaces Isolation test : none
>
> sem_nstest 0 INFO : PID 9262: Fetched existing semaphore..id = 2031616
>
> sem_nstest 1 PASS : Plain cloned process found semaphore inside
> container
>
> sysvipc: Semaphore clone
> sem_nstest 0 INFO : Semaphore namespaces Isolation test : clone
>
> sem_nstest 1 PASS : clone: Container didn't find semaphore
> sysvipc: Semaphore unshare
> sem_nstest 0 INFO : Semaphore namespaces Isolation test : unshare
>
> sem_nstest 1 PASS : unshare: Container didn't find semaphore
>
>
>
>
>
> Regardz
> Veerendra C
>
>
>
>
> Signed-off-by: Veerendra C <veeren...@in.ibm.com>
Acked-by: Serge Hallyn <se...@us.ibm.com>
EXCEPT you should probably use a tst_resm(TBROK) + tst_exit() when
semget fails in main().
thanks,
-serge
> Index: ltp-full-20081231/testcases/kernel/containers/sysvipc/sem_nstest.c
> ===================================================================
> --- /dev/null
> +++ ltp-full-20081231/testcases/kernel/containers/sysvipc/sem_nstest.c
> @@ -0,0 +1,143 @@
> +/* *************************************************************************
> +* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> +*
> +* Author: Veerendra C <vecha...@in.ibm.com>
> +*
> +* In Parent Process , create semaphore with key 154326L
> +* Now create container by passing 1 of the below flag values..
> +* clone(NONE), clone(CLONE_NEWIPC), or unshare(CLONE_NEWIPC)
> +* In cloned process, try to access the created semaphore
> +* Test PASS: If the semaphore is readable when flag is None.
> +* Test FAIL: If the semaphore is readable when flag is Unshare or Clone.
> +***************************************************************************/
> +
> +#define _GNU_SOURCE 1
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <unistd.h>
> +#include <string.h>
> +#include <sys/ipc.h>
> +#include <sys/sem.h>
> +#include <libclone.h>
> +#include <test.h>
> +
> +#define MY_KEY 154326L
> +#define UNSHARESTR "unshare"
> +#define CLONESTR "clone"
> +#define NONESTR "none"
> +
> +char *TCID = "sem_nstest";
> +int TST_TOTAL = 1;
> +int p1[2];
> +int p2[2];
> +
> +int check_semaphore(void *vtest)
> +{
> + char buf[3];
> + int id;
> +
> + close(p1[1]);
> + close(p2[0]);
> +
> + read(p1[0], buf, 3);
> + id = semget(MY_KEY, 1, 0);
> + if (id == -1)
> + write(p2[1], "notfnd", 7);
> + else {
> + write(p2[1], "exists", 7);
> + tst_resm(TINFO, "PID %d: Fetched existing semaphore..id = %d\n",
> + getpid(), id );
> + }
> + tst_exit();
> +
> + /* NOT REACHED */
> + return 0;
> +}
> +
> +int main(int argc, char *argv[])
> +{
> + int ret, use_clone = T_NONE, id;
> + char *tsttype = NONESTR;
> + char buf[7];
> +
> + if (argc != 2) {
> + tst_resm(TFAIL, "Usage: %s <clone| unshare| none>\n", argv[0]);
> + tst_resm(TFAIL, " where clone, unshare, or fork specifies"
> + " unshare method.");
> + tst_exit();
> + }
> +
> + /* Using PIPE's to sync between container and Parent */
> + if (pipe(p1) == -1) { perror("pipe"); exit(EXIT_FAILURE); }
> + if (pipe(p2) == -1) { perror("pipe"); exit(EXIT_FAILURE); }
> +
> + if (strcmp(argv[1], "clone") == 0) {
> + use_clone = T_CLONE;
> + tsttype = CLONESTR;
> + } else if (strcmp(argv[1], "unshare") == 0) {
> + use_clone = T_UNSHARE;
> + tsttype = UNSHARESTR;
> + }
> +
> +
> + /* 1. Create (or fetch if existing) the binary semaphore */
> + id = semget(MY_KEY, 1, IPC_CREAT | IPC_EXCL | 0666);
> + if (id == -1) {
> + perror( "Semaphore create" );
> + if (errno != EEXIST) {
> + perror("semget failure");
> + exit(1);
> + }
> + id = semget(MY_KEY, 1, 0);
> + if (id == -1)
> + perror( "Semaphore create" ), exit(1);
> + }
> +
> + tst_resm(TINFO, "Semaphore namespaces Isolation test : %s\n", tsttype);
> + /* fire off the test */
> + ret = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_semaphore,
> NULL);
> + if (ret < 0) {
> + tst_resm(TFAIL, "%s failed\n", tsttype);
> + tst_exit();
> + }
> +
> + close(p1[0]);
> + close(p2[1]);
> + write(p1[1], "go", 3);
> + read(p2[0], buf, 7);
> +
> + if (strcmp(buf, "exists") == 0) {
> + if (use_clone == T_NONE)
> + tst_resm(TPASS, "Plain cloned process found semaphore "
> + "inside container\n");
> + else
> + tst_resm(TFAIL, "%s: Container init process found
> semaphore\n",
> + tsttype);
> + } else {
> + if (use_clone == T_NONE)
> + tst_resm(TFAIL, "Plain cloned process didn't find
> semaphore\n");
> + else
> + tst_resm(TPASS, "%s: Container didn't find semaphore",
> tsttype);
> + }
> +
> + /* Delete the semaphore */
> + id = semget(MY_KEY, 1, 0);
> + semctl(id, IPC_RMID, 0);
> +
> + tst_exit();
> +
> + /* NOT REACHED */
> + return 0;
> +}
> Index: ltp-full-20081231/testcases/kernel/containers/sysvipc/runipcnstest.sh
> ===================================================================
> --- ltp-full-20081231.orig/testcases/kernel/containers/sysvipc/runipcnstest.sh
> +++ ltp-full-20081231/testcases/kernel/containers/sysvipc/runipcnstest.sh
> @@ -31,6 +31,7 @@ for type in none clone unshare; do
> fi
> done
> echo
> +
> for type in none clone unshare; do
> echo "sysvipc: MesgQ $type"
> mesgq_nstest $type
> @@ -40,4 +41,15 @@ for type in none clone unshare; do
> fi
> done
> echo
> +
> +for type in none clone unshare; do
> + echo "sysvipc: Semaphore $type"
> + sem_nstest $type
> + ret=$?
> + if [ $exit_code -ne 0 ]; then
> + exit_code=$ret
> + fi
> +done
> +echo
> +
> exit $exit_code
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