msgctl08.c revision 7d0a4a57fbcd47f72b67c08df532e8ef47f6fdae 
1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2002
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/* 06/30/2001	Port to Linux	nsharoff@us.ibm.com */
21/* 11/06/2002   Port to LTP     dbarrera@us.ibm.com */
22
23/*
24 * NAME
25 *	msgctl08
26 *
27 * CALLS
28 *	msgget(2) msgctl(2)
29 *
30 * ALGORITHM
31 *	Get and manipulate a message queue.
32 *
33 * RESTRICTIONS
34 *
35 */
36
37#define _XOPEN_SOURCE 500
38#include <signal.h>
39#include <errno.h>
40#include <string.h>
41#include <fcntl.h>
42#include <stdlib.h>
43#include <stdio.h>
44#include <unistd.h>
45#include <values.h>
46#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/stat.h>
49#include <sys/ipc.h>
50#include <sys/msg.h>
51#include "test.h"
52#include "usctest.h"
53#include "ipcmsg.h"
54
55void setup();
56void cleanup();
57/*
58 *  *  *  * These globals must be defined in the test.
59 *   *   *   */
60
61char *TCID = "msgctl08";	/* Test program identifier.    */
62int TST_TOTAL = 1;		/* Total number of test cases. */
63extern int Tst_count;		/* Test Case counter for tst_* routines */
64
65int exp_enos[] = { 0 };		/* List must end with 0 */
66
67#ifndef CONFIG_COLDFIRE
68#define MAXNPROCS	1000000	/* This value is set to an arbitrary high limit. */
69#else
70#define MAXNPROCS	 100000	/* Coldfire can't deal with 1000000 */
71#endif
72#define MAXNREPS	100000
73#define FAIL		1
74#define PASS		0
75
76key_t keyarray[MAXNPROCS];
77
78struct {
79	long type;
80	struct {
81		char len;
82		char pbytes[99];
83	} data;
84} buffer;
85
86int pidarray[MAXNPROCS];
87int tid;
88int MSGMNI, nprocs, nreps;
89int procstat;
90int dotest(key_t key, int child_process);
91int doreader(int id, long key, int child);
92int dowriter(int id, long key, int child);
93int fill_buffer(register char *buf, char val, register int size);
94int verify(register char *buf, char val, register int size, int child);
95void sig_handler();		/* signal catching function */
96int mykid;
97#ifdef UCLINUX
98static char *argv0;
99
100void do_child_1_uclinux();
101static key_t key_uclinux;
102static int i_uclinux;
103
104void do_child_2_uclinux();
105static int id_uclinux;
106static int child_process_uclinux;
107#endif
108
109/*-----------------------------------------------------------------*/
110int main(argc, argv)
111int argc;
112char *argv[];
113{
114	register int i, j, ok, pid;
115	int count, status;
116	struct sigaction act;
117
118#ifdef UCLINUX
119	char *msg;		/* message returned from parse_opts */
120
121	argv0 = argv[0];
122
123	/* parse standard options */
124	if ((msg =
125	     parse_opts(argc, argv, NULL, NULL)) != NULL) {
126		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
127	}
128
129	maybe_run_child(&do_child_1_uclinux, "ndd", 1, &key_uclinux,
130			&i_uclinux);
131	maybe_run_child(&do_child_2_uclinux, "nddd", 2, &id_uclinux,
132			&key_uclinux, &child_process_uclinux);
133#endif
134
135	setup();
136
137	if (argc == 1) {
138		/* Set default parameters */
139		nreps = MAXNREPS;
140		nprocs = MSGMNI;
141	} else if (argc == 3) {
142		if (atoi(argv[1]) > MAXNREPS) {
143			tst_resm(TCONF,
144				 "Requested number of iterations too large, setting to Max. of %d",
145				 MAXNREPS);
146			nreps = MAXNREPS;
147		} else {
148			nreps = atoi(argv[1]);
149		}
150		if (atoi(argv[2]) > MSGMNI) {
151			tst_resm(TCONF,
152				 "Requested number of processes too large, setting to Max. of %d",
153				 MSGMNI);
154			nprocs = MSGMNI;
155		} else {
156			nprocs = atoi(argv[2]);
157		}
158	} else {
159		tst_resm(TCONF,
160			 " Usage: %s [ number of iterations  number of processes ]",
161			 argv[0]);
162		tst_exit();
163	}
164
165	srand(getpid());
166	tid = -1;
167
168	/* Setup signal handleing routine */
169	memset(&act, 0, sizeof(act));
170	act.sa_handler = sig_handler;
171	sigemptyset(&act.sa_mask);
172	sigaddset(&act.sa_mask, SIGTERM);
173	if (sigaction(SIGTERM, &act, NULL) < 0) {
174		tst_resm(TFAIL, "Sigset SIGTERM failed");
175		tst_exit();
176	}
177	/* Set up array of unique keys for use in allocating message
178	 * queues
179	 */
180	for (i = 0; i < nprocs; i++) {
181		ok = 1;
182		do {
183			/* Get random key */
184			keyarray[i] = (key_t) rand();
185			/* Make sure key is unique and not private */
186			if (keyarray[i] == IPC_PRIVATE) {
187				ok = 0;
188				continue;
189			}
190			for (j = 0; j < i; j++) {
191				if (keyarray[j] == keyarray[i]) {
192					ok = 0;
193					break;
194				}
195				ok = 1;
196			}
197		} while (ok == 0);
198	}
199
200	/* Fork a number of processes, each of which will
201	 * create a message queue with one reader/writer
202	 * pair which will read and write a number (iterations)
203	 * of random length messages with specific values.
204	 */
205
206	for (i = 0; i < nprocs; i++) {
207		fflush(stdout);
208		if ((pid = FORK_OR_VFORK()) < 0) {
209			tst_resm(TFAIL,
210				 "\tFork failed (may be OK if under stress)");
211			tst_exit();
212		}
213		/* Child does this */
214		if (pid == 0) {
215#ifdef UCLINUX
216			if (self_exec(argv[0], "ndd", 1, keyarray[i], i) < 0) {
217				tst_resm(TFAIL, "\tself_exec failed");
218				tst_exit();
219			}
220#else
221			procstat = 1;
222			exit(dotest(keyarray[i], i));
223#endif
224		}
225		pidarray[i] = pid;
226	}
227
228	count = 0;
229	while (1) {
230		if ((wait(&status)) > 0) {
231			if (status >> 8 != 0) {
232				tst_resm(TFAIL, "Child exit status = %d",
233					 status >> 8);
234				tst_exit();
235			}
236			count++;
237		} else {
238			if (errno != EINTR) {
239				break;
240			}
241#ifdef DEBUG
242			tst_resm(TINFO, "Signal detected during wait");
243#endif
244		}
245	}
246	/* Make sure proper number of children exited */
247	if (count != nprocs) {
248		tst_resm(TFAIL,
249			 "Wrong number of children exited, Saw %d, Expected %d",
250			 count, nprocs);
251		tst_exit();
252	}
253
254	tst_resm(TPASS, "msgctl08 ran successfully!");
255
256	cleanup();
257	return (0);
258
259}
260
261/*--------------------------------------------------------------------*/
262
263#ifdef UCLINUX
264void do_child_1_uclinux()
265{
266	procstat = 1;
267	exit(dotest(key_uclinux, i_uclinux));
268}
269
270void do_child_2_uclinux()
271{
272	exit(doreader(id_uclinux, key_uclinux % 255, child_process_uclinux));
273}
274#endif
275
276int dotest(key, child_process)
277key_t key;
278int child_process;
279{
280	int id, pid;
281
282	sighold(SIGTERM);
283	TEST(msgget(key, IPC_CREAT | S_IRUSR | S_IWUSR));
284	if (TEST_RETURN < 0) {
285		tst_resm(TFAIL|TTERRNO, "Msgget error in child %d",
286			 child_process);
287		tst_exit();
288	}
289	tid = id = TEST_RETURN;
290	sigrelse(SIGTERM);
291
292	fflush(stdout);
293	if ((pid = FORK_OR_VFORK()) < 0) {
294		tst_resm(TWARN, "\tFork failed (may be OK if under stress)");
295		TEST(msgctl(tid, IPC_RMID, 0));
296		if (TEST_RETURN < 0) {
297			tst_resm(TFAIL|TTERRNO, "Msgctl error in cleanup");
298		}
299		tst_exit();
300	}
301	/* Child does this */
302	if (pid == 0) {
303#ifdef UCLINUX
304		if (self_exec(argv0, "nddd", 2, id, key, child_process) < 0) {
305			tst_resm(TWARN, "self_exec failed");
306			TEST(msgctl(tid, IPC_RMID, 0));
307			if (TEST_RETURN < 0) {
308				tst_resm(TFAIL|TTERRNO, "Msgctl error in cleanup");
309			}
310			tst_exit();
311		}
312#else
313		exit(doreader(id, key % 255, child_process));
314#endif
315	}
316	/* Parent does this */
317	mykid = pid;
318	procstat = 2;
319	dowriter(id, key % 255, child_process);
320	wait(0);
321	TEST(msgctl(id, IPC_RMID, 0));
322	if (TEST_RETURN < 0) {
323		tst_resm(TFAIL, "msgctl errno %d", TEST_ERRNO);
324		tst_exit();
325	}
326	exit(PASS);
327}
328
329int doreader(id, key, child)
330int id, child;
331long key;
332{
333	int i, size;
334
335	for (i = 0; i < nreps; i++) {
336		if ((size = msgrcv(id, &buffer, 100, 0, 0)) < 0) {
337			tst_brkm(TBROK|TERRNO, cleanup,
338				 "Msgrcv error in child %d, read # = %d",
339				 (i + 1), child);
340			tst_exit();
341		}
342		if (buffer.data.len + 1 != size) {
343			tst_resm(TFAIL,
344				 "Size mismatch in child %d, read # = %d",
345				 child, (i + 1));
346			tst_resm(TFAIL,
347				 "for message size got  %d expected  %d",
348				 size, buffer.data.len);
349			tst_exit();
350		}
351		if (verify(buffer.data.pbytes, key, size - 1, child)) {
352			tst_resm(TFAIL, "in child %d read # = %d,key =  %lx",
353				 child, (i + 1), key);
354			tst_exit();
355		}
356		key++;
357	}
358	return (0);
359}
360
361int dowriter(id, key, child)
362int id, child;
363long key;
364{
365	int i, size;
366
367	for (i = 0; i < nreps; i++) {
368		do {
369			size = (rand() % 99);
370		} while (size == 0);
371		fill_buffer(buffer.data.pbytes, key, size);
372		buffer.data.len = size;
373		buffer.type = 1;
374		TEST(msgsnd(id, &buffer, size + 1, 0));
375		if (TEST_RETURN < 0) {
376			tst_brkm(TBROK|TTERRNO, cleanup,
377				 "Msgsnd error in child %d, key =   %lx",
378				 child, key);
379		}
380		key++;
381	}
382	return (0);
383}
384
385int fill_buffer(buf, val, size)
386register char *buf;
387char val;
388register int size;
389{
390	register int i;
391
392	for (i = 0; i < size; i++) {
393		buf[i] = val;
394	}
395
396	return (0);
397}
398
399/*
400 * verify()
401 *	Check a buffer for correct values.
402 */
403
404int verify(buf, val, size, child)
405register char *buf;
406char val;
407register int size;
408int child;
409{
410	while (size-- > 0) {
411		if (*buf++ != val) {
412			tst_resm(TWARN,
413				 "Verify error in child %d, *buf = %x, val = %x, size = %d",
414				 child, *buf, val, size);
415			return (FAIL);
416		}
417	}
418	return (PASS);
419}
420
421/*
422 *  * void
423 *  * sig_handler() - signal catching function for 'SIGUSR1' signal.
424 *  *
425 *  *   This is a null function and used only to catch the above signal
426 *  *   generated in parent process.
427 *  */
428void sig_handler()
429{
430}
431
432/***************************************************************
433 * setup() - performs all ONE TIME setup for this test.
434 *****************************************************************/
435void setup()
436{
437	int nr_msgqs;
438
439	tst_tmpdir();
440
441	/* You will want to enable some signal handling so you can capture
442	 * unexpected signals like SIGSEGV.
443	 */
444	tst_sig(FORK, DEF_HANDLER, cleanup);
445
446	/* One cavet that hasn't been fixed yet.  TEST_PAUSE contains the code to
447	 * fork the test with the -c option.  You want to make sure you do this
448	 * before you create your temporary directory.
449	 */
450	TEST_PAUSE;
451
452	nr_msgqs = get_max_msgqueues();
453	if (nr_msgqs < 0)
454		cleanup();
455
456	nr_msgqs -= get_used_msgqueues();
457	if (nr_msgqs <= 0) {
458		tst_resm(TBROK,
459			 "Max number of message queues already used, cannot create more.");
460		cleanup();
461	}
462
463	/*
464	 * Since msgmni scales to the memory size, it may reach huge values
465	 * that are not necessary for this test.
466	 * That's why we define NR_MSGQUEUES as a high boundary for it.
467	 */
468	MSGMNI = min(nr_msgqs, NR_MSGQUEUES);
469}
470
471/***************************************************************
472 * cleanup() - performs all ONE TIME cleanup for this test at
473 *             completion or premature exit.
474 ****************************************************************/
475void cleanup()
476{
477	int status;
478	/*
479	 *  Remove the message queue from the system
480	 */
481#ifdef DEBUG
482	tst_resm(TINFO, "Removing the message queue");
483#endif
484	fflush(stdout);
485	(void)msgctl(tid, IPC_RMID, NULL);
486	if ((status = msgctl(tid, IPC_STAT, NULL)) != -1) {
487		(void)msgctl(tid, IPC_RMID, NULL);
488		tst_resm(TFAIL, "msgctl(tid, IPC_RMID) failed");
489
490	}
491
492	fflush(stdout);
493	/*
494	 * print timing stats if that option was specified.
495	 * print errno log if that option was specified.
496	 */
497	TEST_CLEANUP;
498	tst_rmdir();
499
500}