| /* |
| * Copyright (c) International Business Machines Corp., 2002 |
| * |
| * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * 06/30/2001 Port to Linux nsharoff@us.ibm.com |
| * 11/06/2002 Port to LTP dbarrera@us.ibm.com |
| */ |
| |
| /* |
| * Get and manipulate a message queue. |
| * Same as msgstress01 but gets the actual msgmni value under procfs. |
| */ |
| |
| #define _XOPEN_SOURCE 500 |
| #include <signal.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <values.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <sys/stat.h> |
| #include <sys/ipc.h> |
| #include <sys/msg.h> |
| #include "test.h" |
| #include "ipcmsg.h" |
| #include "../lib/libmsgctl.h" |
| |
| char *TCID = "msgstress03"; |
| int TST_TOTAL = 1; |
| |
| #define MAXNPROCS 10000 /*These should be sufficient */ |
| #define MAXNREPS 10000 /*Else they srewup the system un-necessarily */ |
| |
| static key_t keyarray[MAXNPROCS]; |
| static int pidarray[MAXNPROCS]; |
| static int tid; |
| static int MSGMNI, nprocs, nreps; |
| static int procstat; |
| static int mykid; |
| |
| void setup(void); |
| void cleanup(void); |
| |
| static int dotest(key_t key, int child_process); |
| static void sig_handler(int signo); |
| |
| static char *opt_nprocs; |
| static char *opt_nreps; |
| |
| static option_t options[] = { |
| {"n:", NULL, &opt_nprocs}, |
| {"l:", NULL, &opt_nreps}, |
| {NULL, NULL, NULL}, |
| }; |
| |
| static void usage(void) |
| { |
| printf(" -n Number of processes\n"); |
| printf(" -l Number of iterations\n"); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int i, j, ok, pid; |
| int count, status; |
| struct sigaction act; |
| |
| tst_parse_opts(argc, argv, options, usage); |
| |
| setup(); |
| |
| nreps = MAXNREPS; |
| nprocs = MSGMNI; |
| |
| if (opt_nreps) { |
| nreps = atoi(opt_nreps); |
| if (nreps > MAXNREPS) { |
| tst_resm(TINFO, |
| "Requested number of iterations too large, " |
| "setting to Max. of %d", MAXNREPS); |
| nreps = MAXNREPS; |
| } |
| } |
| |
| if (opt_nprocs) { |
| nprocs = atoi(opt_nprocs); |
| if (nprocs > MSGMNI) { |
| tst_resm(TINFO, |
| "Requested number of processes too large, " |
| "setting to Max. of %d", MSGMNI); |
| nprocs = MSGMNI; |
| } |
| } |
| |
| srand(getpid()); |
| tid = -1; |
| |
| /* Setup signal handling routine */ |
| memset(&act, 0, sizeof(act)); |
| act.sa_handler = sig_handler; |
| sigemptyset(&act.sa_mask); |
| sigaddset(&act.sa_mask, SIGTERM); |
| if (sigaction(SIGTERM, &act, NULL) < 0) { |
| tst_brkm(TFAIL, NULL, "Sigset SIGTERM failed"); |
| } |
| /* Set up array of unique keys for use in allocating message |
| * queues |
| */ |
| for (i = 0; i < nprocs; i++) { |
| ok = 1; |
| do { |
| /* Get random key */ |
| keyarray[i] = (key_t) rand(); |
| /* Make sure key is unique and not private */ |
| if (keyarray[i] == IPC_PRIVATE) { |
| ok = 0; |
| continue; |
| } |
| for (j = 0; j < i; j++) { |
| if (keyarray[j] == keyarray[i]) { |
| ok = 0; |
| break; |
| } |
| ok = 1; |
| } |
| } while (ok == 0); |
| } |
| |
| /* Fork a number of processes, each of which will |
| * create a message queue with one reader/writer |
| * pair which will read and write a number (iterations) |
| * of random length messages with specific values. |
| */ |
| |
| for (i = 0; i < nprocs; i++) { |
| fflush(stdout); |
| if ((pid = FORK_OR_VFORK()) < 0) { |
| tst_brkm(TFAIL, |
| NULL, |
| "\tFork failed (may be OK if under stress)"); |
| } |
| /* Child does this */ |
| if (pid == 0) { |
| procstat = 1; |
| exit(dotest(keyarray[i], i)); |
| } |
| pidarray[i] = pid; |
| } |
| |
| count = 0; |
| while (1) { |
| if ((wait(&status)) > 0) { |
| if (status >> 8 != 0) { |
| tst_brkm(TFAIL, NULL, |
| "Child exit status = %d", |
| status >> 8); |
| } |
| count++; |
| } else { |
| if (errno != EINTR) { |
| break; |
| } |
| #ifdef DEBUG |
| tst_resm(TINFO, "Signal detected during wait"); |
| #endif |
| } |
| } |
| /* Make sure proper number of children exited */ |
| if (count != nprocs) { |
| tst_brkm(TFAIL, |
| NULL, |
| "Wrong number of children exited, Saw %d, Expected %d", |
| count, nprocs); |
| } |
| |
| tst_resm(TPASS, "Test ran successfully!"); |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static int dotest(key_t key, int child_process) |
| { |
| int id, pid; |
| int ret, status; |
| |
| sighold(SIGTERM); |
| TEST(msgget(key, IPC_CREAT | S_IRUSR | S_IWUSR)); |
| if (TEST_RETURN < 0) { |
| printf("msgget() error in child %d: %s\n", |
| child_process, strerror(TEST_ERRNO)); |
| return FAIL; |
| } |
| tid = id = TEST_RETURN; |
| sigrelse(SIGTERM); |
| |
| fflush(stdout); |
| if ((pid = FORK_OR_VFORK()) < 0) { |
| printf("Fork failed (may be OK if under stress)\n"); |
| TEST(msgctl(tid, IPC_RMID, 0)); |
| if (TEST_RETURN < 0) { |
| printf("msgctl() error in cleanup: %s\n", |
| strerror(TEST_ERRNO)); |
| } |
| return FAIL; |
| } |
| if (pid == 0) |
| exit(doreader(key, id, 1, child_process, nreps)); |
| |
| mykid = pid; |
| procstat = 2; |
| ret = dowriter(key, id, 1, child_process, nreps); |
| wait(&status); |
| |
| if (ret != PASS) |
| exit(FAIL); |
| |
| if ((!WIFEXITED(status) || (WEXITSTATUS(status) != PASS))) |
| exit(FAIL); |
| |
| TEST(msgctl(id, IPC_RMID, 0)); |
| if (TEST_RETURN < 0) { |
| printf("msgctl() failed: %s\n", |
| strerror(TEST_ERRNO)); |
| return FAIL; |
| } |
| return PASS; |
| } |
| |
| static void sig_handler(int signo LTP_ATTRIBUTE_UNUSED) |
| { |
| } |
| |
| void setup(void) |
| { |
| int nr_msgqs; |
| |
| tst_tmpdir(); |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| nr_msgqs = get_max_msgqueues(); |
| if (nr_msgqs < 0) |
| cleanup(); |
| |
| MSGMNI = nr_msgqs - get_used_msgqueues(); |
| if (MSGMNI > MAXNPROCS) |
| MSGMNI = MAXNPROCS; |
| if (MSGMNI <= 0) { |
| tst_resm(TBROK, |
| "Max number of message queues already used, cannot create more."); |
| cleanup(); |
| } |
| } |
| |
| void cleanup(void) |
| { |
| int status; |
| |
| #ifdef DEBUG |
| tst_resm(TINFO, "Removing the message queue"); |
| #endif |
| (void)msgctl(tid, IPC_RMID, NULL); |
| if ((status = msgctl(tid, IPC_STAT, NULL)) != -1) { |
| (void)msgctl(tid, IPC_RMID, NULL); |
| tst_resm(TFAIL, "msgctl(tid, IPC_RMID) failed"); |
| |
| } |
| |
| tst_rmdir(); |
| } |