Hi
Submitting testcase on mesgq to test the IPCNS in the containers.
In this patch , I am checking the functionaity:
"mesgq in parent NS is isolated from the container"
Version 2:
Changelog :
Included the syntax to delete the mesgq created.
Results:
# ./mesgq none
mesgq 0 INFO : mesgq namespaces test : none
mesgq 0 INFO : Mesg read of 18 bytes; Type 5: Msg: Message of
type 5!
mesgq 1 PASS : Plain cloned process found mesgq inside container
# ./mesgq clone
mesgq 0 INFO : mesgq namespaces test : clone
mesgq 1 PASS : clone: Container didn't find mesgq
# ./mesgq unshare
mesgq 0 INFO : mesgq namespaces test : unshare
mesgq 1 PASS : unshare: Container didn't find mesgq
Regards
Veerendra C
Index: ltp-full-20081231/testcases/kernel/containers/sysvipc/mesgq.c
===================================================================
--- /dev/null
+++ ltp-full-20081231/testcases/kernel/containers/sysvipc/mesgq.c
@@ -0,0 +1,164 @@
+/* *************************************************************************
+* 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 <[email protected]>
+*
+* In Parent Process , create mesgq with key 154326L
+* Now create container by passing 1 of the flag values..
+* Flag = clone, clone(CLONE_NEWIPC), or unshare(CLONE_NEWIPC)
+* In cloned process, try to access the created mesgq
+* Test PASS: If the mesgq is readable when flag is None.
+* Test FAIL: If the mesgq is readable when flag is Unshare or Clone.
+***************************************************************************/
+
+#define _GNU_SOURCE 1
+#include <sys/wait.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
+#include <libclone.h>
+#include <test.h>
+
+#define KEY_VAL 154326L
+#define UNSHARESTR "unshare"
+#define CLONESTR "clone"
+#define NONESTR "none"
+
+char *TCID = "mesgq";
+int TST_TOTAL=1;
+int READMAX=80;
+int p1[2];
+int p2[2];
+int id=0,n=0;
+struct msg_buf {
+ long int mtype; /* type of received/sent message */
+ char mtext[80]; /* text of the message */
+ } msg;
+
+int mesgq_read(id)
+{
+ // read msg type 5 on the Q; msgtype, flags are last 2 params..
+
+ n = msgrcv(id, &msg, READMAX, 5, 0);
+ if (n == -1)
+ perror("msgrcv"), tst_exit(1);
+
+ tst_resm(TINFO, "Mesg read of %d bytes; Type %ld: Msg: %.*s\n",
+ n, msg.mtype, n, msg.mtext);
+}
+
+int check_mesgq(void *vtest)
+{
+ char buf[3];
+ int id;
+
+ close(p1[1]);
+ close(p2[0]);
+
+ read(p1[0], buf, 3);
+ id=msgget(KEY_VAL, 0);
+ if (id == -1)
+ write(p2[1], "notfnd", 7);
+ else {
+ write(p2[1], "exists", 7);
+ mesgq_read(id);
+ }
+ tst_exit(0);
+
+ /* NOT REACHED */
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int r, use_clone = T_NONE;
+ 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(2);
+ }
+
+ /* 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); }
+
+ tsttype = NONESTR;
+
+ 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;
+ }
+
+ id = msgget(KEY_VAL, IPC_CREAT | IPC_EXCL | 0600);
+ if (id == -1) {
+ perror("msgget");
+ // Retry without attempting to create the MQ
+ id = msgget(KEY_VAL,0);
+ if( id == -1 ) perror("msgget failure"),exit(1);
+ }
+
+ msg.mtype = 5;
+ strcpy(msg.mtext, "Message of type 5!");
+ n = msgsnd(id, &msg, strlen( msg.mtext), 0);
+ if (n == -1)
+ perror("msgsnd"), tst_exit(1);
+
+ tst_resm(TINFO, "mesgq namespaces test : %s\n",tsttype);
+ /* fire off the test */
+ r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mesgq, NULL);
+ if (r < 0) {
+ tst_resm(TFAIL, "%s failed\n", tsttype);
+ tst_exit(1);
+ }
+
+ 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 mesgq "
+ "inside container\n");
+ else
+ tst_resm(TFAIL, "%s: Container init process found mesgq\n",
+ tsttype);
+ } else {
+ if (use_clone == T_NONE)
+ tst_resm(TFAIL, "Plain cloned process didn't find mesgq\n");
+ else {
+ tst_resm(TPASS, "%s: Container didn't find mesgq", tsttype);
+ }
+ }
+
+ /* Delete the mesgQ */
+ id = msgget(KEY_VAL, 0);
+ msgctl(id, IPC_RMID, NULL);
+
+ tst_exit(0);
+
+ /* NOT REACHED */
+ return 0;
+}
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