/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
*/
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Whamcloud, Inc.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-
+#include <pthread.h>
#include <sys/file.h>
+#include <sys/wait.h>
+#include <stdarg.h>
-void usage(void)
+#define MAX_PATH_LENGTH 4096
+/**
+ * helper functions
+ */
+int t_fcntl(int fd, int cmd, ...)
{
- fprintf(stderr, "usage: ./flocks_test on|off -c|-f|-l /path/to/file\n");
- exit(EXIT_FAILURE);
+ va_list ap;
+ long arg;
+ struct flock *lock;
+ int rc = -1;
+
+ va_start(ap, cmd);
+ switch (cmd) {
+ case F_GETFL:
+ va_end(ap);
+ rc = fcntl(fd, cmd);
+ if (rc == -1) {
+ fprintf(stderr, "fcntl GETFL failed: %s\n",
+ strerror(errno));
+ return(1);
+ }
+ break;
+ case F_SETFL:
+ arg = va_arg(ap, long);
+ va_end(ap);
+ rc = fcntl(fd, cmd, arg);
+ if (rc == -1) {
+ fprintf(stderr, "fcntl SETFL %ld failed: %s\n",
+ arg, strerror(errno));
+ return(1);
+ }
+ break;
+ case F_GETLK:
+ case F_SETLK:
+ case F_SETLKW:
+ lock = va_arg(ap, struct flock *);
+ va_end(ap);
+ rc = fcntl(fd, cmd, lock);
+ if (rc == -1) {
+ fprintf(stderr, "fcntl cmd %d failed: %s\n",
+ cmd, strerror(errno));
+ return(1);
+ }
+ break;
+ case F_DUPFD:
+ arg = va_arg(ap, long);
+ va_end(ap);
+ rc = fcntl(fd, cmd, arg);
+ if (rc == -1) {
+ fprintf(stderr, "fcntl F_DUPFD %d failed: %s\n",
+ (int)arg, strerror(errno));
+ return(1);
+ }
+ break;
+ default:
+ va_end(ap);
+ fprintf(stderr, "fcntl cmd %d not supported\n", cmd);
+ return(1);
+ }
+ return rc;
}
-int main(int argc, char *argv[])
+int t_unlink(const char *path)
+{
+ int rc;
+
+ rc = unlink(path);
+ if (rc)
+ fprintf(stderr, "unlink(%s) error: %s\n", path, strerror(errno));
+ return rc;
+}
+
+/** =================================================================
+ * test number 1
+ *
+ * normal flock test
+ */
+void t1_usage(void)
+{
+ fprintf(stderr, "usage: ./flocks_test 1 on|off -c|-f|-l /path/to/file\n");
+}
+
+int t1(int argc, char *argv[])
{
int fd;
int mount_with_flock = 0;
int error = 0;
- if (argc != 4)
- usage();
-
- if (!strncmp(argv[1], "on", 3)) {
+ if (argc != 5) {
+ t1_usage();
+ return EXIT_FAILURE;
+ }
+
+ if (!strncmp(argv[2], "on", 3)) {
mount_with_flock = 1;
- } else if (!strncmp(argv[1], "off", 4)) {
+ } else if (!strncmp(argv[2], "off", 4)) {
mount_with_flock = 0;
} else {
- usage();
+ t1_usage();
+ return EXIT_FAILURE;
}
- if ((fd = open(argv[3], O_RDWR)) < 0) {
- fprintf(stderr, "Couldn't open file: %s\n", argv[2]);
- exit(EXIT_FAILURE);
+ if ((fd = open(argv[4], O_RDWR)) < 0) {
+ fprintf(stderr, "Couldn't open file: %s\n", argv[3]);
+ return EXIT_FAILURE;
}
- if (!strncmp(argv[2], "-c", 3)) {
+ if (!strncmp(argv[3], "-c", 3)) {
struct flock fl;
fl.l_type = F_RDLCK;
fl.l_len = 1;
error = fcntl(fd, F_SETLK, &fl);
- } else if (!strncmp(argv[2], "-l", 3)) {
+ } else if (!strncmp(argv[3], "-l", 3)) {
error = lockf(fd, F_LOCK, 1);
- } else if (!strncmp(argv[2], "-f", 3)) {
+ } else if (!strncmp(argv[3], "-f", 3)) {
error = flock(fd, LOCK_EX);
} else {
- usage();
+ t1_usage();
+ return EXIT_FAILURE;
}
if (mount_with_flock)
else
return((error == 0) ? EXIT_FAILURE : EXIT_SUCCESS);
}
+
+/** ===============================================================
+ * test number 2
+ *
+ * 2 threads flock ops interweave
+ */
+typedef struct {
+ struct flock* lock;
+ int fd;
+} th_data;
+
+void* t2_thread1(void *arg)
+{
+ struct flock *lock = ((th_data *)arg)->lock;
+ int fd = ((th_data *)arg)->fd;
+
+ printf("thread 1: set write lock (blocking)\n");
+ lock->l_type = F_WRLCK;
+ t_fcntl(fd, F_SETLKW, lock);
+ printf("thread 1: set write lock done\n");
+ t_fcntl(fd, F_GETLK, lock);
+ printf("thread 1: unlock\n");
+ lock->l_type = F_UNLCK;
+ t_fcntl(fd, F_SETLK, lock);
+ printf("thread 1: unlock done\n");
+ return 0;
+}
+
+void* t2_thread2(void *arg)
+{
+ struct flock *lock = ((th_data *)arg)->lock;
+ int fd = ((th_data *)arg)->fd;
+
+ sleep(2);
+ printf("thread 2: unlock\n");
+ lock->l_type = F_UNLCK;
+ t_fcntl(fd, F_SETLK, lock);
+ printf("thread 2: unlock done\n");
+ printf("thread 2: set write lock (non-blocking)\n");
+ lock->l_type = F_WRLCK;
+ t_fcntl(fd, F_SETLK, lock);
+ printf("thread 2: set write lock done\n");
+ t_fcntl(fd, F_GETLK, lock);
+ return 0;
+}
+
+int t2(int argc, char* argv[])
+{
+ struct flock lock = {
+ .l_type = F_RDLCK,
+ .l_whence = SEEK_SET,
+ };
+ char file[MAX_PATH_LENGTH] = "";
+ int fd, rc;
+ pthread_t th1, th2;
+ th_data ta;
+
+ snprintf(file, MAX_PATH_LENGTH, "%s/test_t2_file", argv[2]);
+
+ fd = open(file, O_RDWR|O_CREAT, (mode_t)0666);
+ if (fd < 0) {
+ fprintf(stderr, "error open file: %s\n", file);
+ return EXIT_FAILURE;
+ }
+
+ t_fcntl(fd, F_SETFL, O_APPEND);
+ rc = t_fcntl(fd, F_GETFL);
+ if ((rc & O_APPEND) == 0) {
+ fprintf(stderr, "error get flag: ret %x\n", rc);
+ return EXIT_FAILURE;
+ }
+
+ ta.lock = &lock;
+ ta.fd = fd;
+ rc = pthread_create(&th1, NULL, t2_thread1, &ta);
+ if (rc) {
+ fprintf(stderr, "error create thread 1\n");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+ rc = pthread_create(&th2, NULL, t2_thread2, &ta);
+ if (rc) {
+ fprintf(stderr, "error create thread 2\n");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+ (void)pthread_join(th1, NULL);
+ (void)pthread_join(th2, NULL);
+out:
+ t_unlink(file);
+ close(fd);
+ return rc;
+}
+
+/** =================================================================
+ * test number 3
+ *
+ * Bug 24040: Two conflicting flocks from same process different fds should fail
+ * two conflicting flocks from different processes but same fs
+ * should succeed.
+ */
+int t3(int argc, char *argv[])
+{
+ int fd, fd2;
+ int pid;
+ int rc = EXIT_SUCCESS;
+
+ if (argc != 3) {
+ fprintf(stderr, "Usage: ./flocks_test 3 filename\n");
+ return EXIT_FAILURE;
+ }
+
+ if ((fd = open(argv[2], O_RDWR)) < 0) {
+ fprintf(stderr, "Couldn't open file: %s\n", argv[1]);
+ return EXIT_FAILURE;
+ }
+ if (flock(fd, LOCK_EX | LOCK_NB) < 0) {
+ perror("first flock failed");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+ if ((fd2 = open(argv[2], O_RDWR)) < 0) {
+ fprintf(stderr, "Couldn't open file: %s\n", argv[1]);
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+ if (flock(fd2, LOCK_EX | LOCK_NB) >= 0) {
+ fprintf(stderr, "Second flock succeeded - FAIL\n");
+ rc = EXIT_FAILURE;
+ close(fd2);
+ goto out;
+ }
+
+ close(fd2);
+
+ pid = fork();
+ if (pid == -1) {
+ perror("fork");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+
+ if (pid == 0) {
+ if ((fd2 = open(argv[2], O_RDWR)) < 0) {
+ fprintf(stderr, "Couldn't open file: %s\n", argv[1]);
+ rc = EXIT_FAILURE;
+ exit(rc);
+ }
+ if (flock(fd2, LOCK_EX | LOCK_NB) >= 0) {
+ fprintf(stderr, "Second flock succeeded - FAIL\n");
+ rc = EXIT_FAILURE;
+ goto out_child;
+ }
+ if (flock(fd, LOCK_UN) == -1) {
+ fprintf(stderr, "Child unlock on parent fd failed\n");
+ rc = EXIT_FAILURE;
+ goto out_child;
+ }
+ if (flock(fd2, LOCK_EX | LOCK_NB) == -1) {
+ fprintf(stderr, "Relock after parent unlock failed!\n");
+ rc = EXIT_FAILURE;
+ goto out_child;
+ }
+ out_child:
+ close(fd2);
+ exit(rc);
+ }
+
+ waitpid(pid, &rc, 0);
+out:
+ close(fd);
+ return rc;
+}
+
+
+/** ==============================================================
+ * program entry
+ */
+void usage(void)
+{
+ fprintf(stderr, "usage: ./flocks_test test# [corresponding arguments]\n");
+}
+
+int main(int argc, char* argv[])
+{
+ int test_no;
+ int rc = EXIT_SUCCESS;
+
+ if (argc < 1) {
+ usage();
+ exit(EXIT_FAILURE);
+ }
+ test_no = atoi(argv[1]);
+
+ switch(test_no) {
+ case 1:
+ rc = t1(argc, argv);
+ break;
+ case 2:
+ rc = t2(argc, argv);
+ break;
+ case 3:
+ rc = t3(argc, argv);
+ break;
+ default:
+ fprintf(stderr, "unknow test number %s\n", argv[1]);
+ break;
+ }
+ return rc;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff