[LTP] [PATCH v2 2/2] syscalls/mkdir09: rewrite in new LTP API
Jan Stancek
jstancek@redhat.com
Fri Feb 4 14:14:02 CET 2022
'jump' variable is not initialized, which I suspect is behind
rare failures of this test. The original test is using longjmp,
processes and signals to sychronize couple processes that
exercise mkdir/rmdir calls.
Rewrite it using threads and new LTP API, drop all parameters,
because no runtest is using them, and make new default test time
just 1 second.
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
testcases/kernel/syscalls/mkdir/Makefile | 2 +
testcases/kernel/syscalls/mkdir/mkdir09.c | 494 ++++------------------
2 files changed, 93 insertions(+), 403 deletions(-)
diff --git a/testcases/kernel/syscalls/mkdir/Makefile b/testcases/kernel/syscalls/mkdir/Makefile
index 044619fb8724..881b087c6c1a 100644
--- a/testcases/kernel/syscalls/mkdir/Makefile
+++ b/testcases/kernel/syscalls/mkdir/Makefile
@@ -3,6 +3,8 @@
top_srcdir ?= ../../../..
+mkdir09: CFLAGS += -pthread
+
include $(top_srcdir)/include/mk/testcases.mk
include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/syscalls/mkdir/mkdir09.c b/testcases/kernel/syscalls/mkdir/mkdir09.c
index 88034d29ed89..a2870ae94df8 100644
--- a/testcases/kernel/syscalls/mkdir/mkdir09.c
+++ b/testcases/kernel/syscalls/mkdir/mkdir09.c
@@ -1,460 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- *
- * 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
+ * Copyright (c) International Business Machines Corp., 2001
+ * Copyright (c) Linux Test Project, 2022
*/
-/* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
-/* 10/30/2002 Port to LTP dbarrera@us.ibm.com */
-
-/*
- * Stress test of mkdir call.
- *
- * ALGORITHM
- * Create multiple processes which create subdirectories in the
- * same directory multiple times. On exit of all child processes,
- * make sure all subdirectories can be removed.
- *
- * USAGE: mkdir09 -c # -t # -d #
- * -c = number of children groups
- * -t = number of seconds to run test
- * -d = number of directories created in test directory
+/*\
+ * [Description]
*
+ * Create multiple processes which create subdirectories in the
+ * same directory multiple times within test time.
*/
#include <stdio.h>
-#include <sys/wait.h>
-#include <sys/types.h>
#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <errno.h>
-#include <signal.h>
-#include <unistd.h>
-#include <setjmp.h>
-#include "test.h"
-
-#include <stdlib.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define NCHILD 3
+#include "tst_test.h"
+#include "tst_safe_pthread.h"
+#define MNTPOINT "mntpoint"
#define MODE_RWX 07770
-#define DIR_NAME "./X.%d"
-
-char *TCID = "mkdir09";
-int TST_TOTAL = 1;
-
-char testdir[MAXPATHLEN];
-int parent_pid, sigchld, sigterm, jump;
-void term(int sig);
-void chld(int sig);
-int *pidlist, child_count;
-jmp_buf env_buf;
-
-int getchild(int group, int child, int children);
-int dochild1(void);
-int dochild2(void);
-int dochild3(int group);
-int massmurder(void);
-int runtest(void);
-void setup(void);
-void cleanup(void);
+#define DIR_NAME MNTPOINT "/X.%d"
+#define DIR_NAME_GROUP MNTPOINT "/X.%d.%d"
+#define NCHILD 3
static int child_groups = 2;
-static int test_time = 5;
+static int test_time = 1;
static int nfiles = 5;
+static volatile int done;
-static char *opt_child_groups;
-static char *opt_test_time;
-static char *opt_nfiles;
-
-static option_t options[] = {
- {"c:", NULL, &opt_child_groups},
- {"t:", NULL, &opt_test_time},
- {"d:", NULL, &opt_nfiles},
- {NULL, NULL, NULL}
-};
-
-static void usage(void)
-{
- printf(" -c Child groups\n");
- printf(" -t Test runtime\n");
- printf(" -d Directories\n");
-}
-
-int main(int argc, char *argv[])
-{
- tst_parse_opts(argc, argv, options, usage);
-
- if (opt_child_groups)
- child_groups = atoi(opt_child_groups);
-
- if (opt_test_time)
- test_time = atoi(opt_test_time);
-
- if (opt_nfiles)
- nfiles = atoi(opt_nfiles);
-
- setup();
-
- if (signal(SIGTERM, term) == SIG_ERR) {
- tst_brkm(TFAIL, cleanup,
- "Error setting up SIGTERM signal, ERRNO = %d", errno);
-
- }
-
- if (signal(SIGCHLD, chld) == SIG_ERR) {
- tst_brkm(TFAIL, cleanup,
- "Error setting up SIGCHLD signal, ERRNO = %d", errno);
-
- }
-
- runtest();
- cleanup();
- tst_exit();
-}
-
-int runtest(void)
-{
- int i, j;
- int count, child, status;
- char tmpdir[MAXPATHLEN];
-
- /* Create permanent directories with holes in directory structure */
-
- for (j = 0; j < nfiles; j++) {
- sprintf(tmpdir, DIR_NAME, j);
- TEST(mkdir(tmpdir, MODE_RWX));
-
- if (TEST_RETURN < 0) {
- tst_brkm(TFAIL, cleanup,
- "Error creating permanent directories, ERRNO = %d",
- TEST_ERRNO);
- }
- if ((j % NCHILD) != 0) {
- if (rmdir(tmpdir) < 0) {
- tst_brkm(TFAIL, cleanup,
- "Error removing directory, ERRNO = %d",
- errno);
- }
- }
- }
-
- parent_pid = getpid();
-
- /* allocate space for list of child pid's */
-
- if ((pidlist = malloc((child_groups * NCHILD) * sizeof(int))) ==
- NULL) {
- tst_brkm(TWARN, NULL,
- "\tMalloc failed (may be OK if under stress)");
- }
-
- child_count = 0;
- for (j = 0; j < child_groups; j++) {
- for (i = 0; i < NCHILD; i++) {
- getchild(j, i, child_count);
- child_count++;
- }
- }
-
- /* If signal already received, skip to cleanup */
-
- if (!sigchld && !sigterm) {
- if (test_time) {
- /* To get out of sleep if signal caught */
- if (!setjmp(env_buf)) {
- jump++;
- sleep(test_time);
- }
- } else {
- pause();
- }
- }
-
- /* Reset signals since we are about to clean-up and to avoid
- * problem with wait call * $
- * */
-
- if (signal(SIGTERM, SIG_IGN) == SIG_ERR) {
- tst_brkm(TFAIL, cleanup,
- "Error resetting SIGTERM signal, ERRNO = %d", errno);
- }
- if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
- tst_brkm(TFAIL, cleanup,
- "Error resetting SIGCHLD signal, ERRNO = %d", errno);
- }
-
- if (test_time) {
- sleep(test_time);
- }
-
- /* Clean up children */
- massmurder();
- /*
- * Watch children finish and show returns.
- */
-
- count = 0;
- while (1) {
- if ((child = wait(&status)) > 0) {
- if (status != 0) {
- tst_brkm(TWARN,
- NULL,
- "\tChild{%d} exited status = %0x",
- child, status);
- }
- count++;
- } else {
- if (errno != EINTR) {
- break;
- }
- tst_resm(TINFO, "\tSignal detected during wait");
- }
- }
-
- /*
- * Make sure correct number of children exited.
- */
-
- if (count != child_count) {
- tst_resm(TWARN, "\tWrong number of children waited on!");
- tst_brkm(TWARN, NULL, "\tSaw %d, expected %d", count,
- NCHILD);
- }
-
- /* Check for core file in test directory. */
-
- if (access("core", 0) == 0) {
- tst_brkm(TWARN, NULL, "\tCore file found in test directory.");
- }
-
- /* Remove expected files */
-
- for (j = 0; j < nfiles; j += NCHILD) {
- sprintf(tmpdir, DIR_NAME, j);
- if (rmdir(tmpdir) < 0) {
- tst_brkm(TWARN,
- NULL,
- "\tError removing expected directory, ERRNO = %d",
- errno);
- }
- }
-
- tst_resm(TPASS, "PASS");
-
- return 0;
-}
-
-int getchild(int group, int child, int children)
-{
- int pid;
-
- pid = FORK_OR_VFORK();
-
- if (pid < 0) {
-
- massmurder(); /* kill the kids */
- tst_brkm(TBROK, cleanup,
- "\tFork failed (may be OK if under stress)");
- } else if (pid == 0) { /* child does this */
- switch (children % NCHILD) {
- case 0:
- dochild1(); /* create existing directories */
- break; /* so lint won't complain */
- case 1:
- dochild2(); /* remove nonexistant directories */
- break;
- case 2:
- dochild3(group); /* create/delete directories */
- break;
- default:
- tst_brkm(TFAIL, cleanup,
- "Test not inplemented for child %d", child);
- exit(1);
- break;
- }
- exit(1); /* If child gets here, something wrong */
- }
- pidlist[children] = pid;
- return 0;
-}
-
-void term(int sig)
-{
- /* Routine to handle SIGTERM signal. */
-
- if (parent_pid == getpid()) {
- tst_brkm(TWARN, NULL, "\tsignal SIGTERM received by parent.");
- }
- sigterm++;
- if (jump) {
- longjmp(env_buf, 1);
- }
-}
-
-void chld(int sig)
-{
- /* Routine to handle SIGCHLD signal. */
-
- sigchld++;
- if (jump) {
- longjmp(env_buf, 1);
- }
-}
-
-int dochild1(void)
+/*
+ * Routine which attempts to create directories in the test
+ * directory that already exist.
+ */
+static void test1(int child_num)
{
- /* Child routine which attempts to create directories in the test
- * directory that already exist. Runs until a SIGTERM signal is
- * received. Will exit with an error if it is able to create the
- * directory or if the expected error is not received.
- */
-
int j;
char tmpdir[MAXPATHLEN];
- while (!sigterm) {
+ while (!done) {
for (j = 0; j < nfiles; j += NCHILD) {
sprintf(tmpdir, DIR_NAME, j);
- TEST(mkdir(tmpdir, MODE_RWX));
-
- if (TEST_RETURN < 0) {
-
- if (TEST_ERRNO != EEXIST) {
- tst_brkm(TFAIL, cleanup,
- "MKDIR %s, errno = %d; Wrong error detected.",
- tmpdir, TEST_ERRNO);
- exit(1);
- }
- } else {
- tst_brkm(TFAIL, cleanup,
- "MKDIR %s succeded when it shoud have failed.",
- tmpdir);
- exit(1);
- }
+ TST_EXP_FAIL_SILENT(mkdir(tmpdir, MODE_RWX), EEXIST);
+ if (!TST_PASS)
+ break;
}
}
- exit(0);
+ tst_res(TPASS, "[%d] create dirs that already exist", child_num);
}
-int dochild2(void)
+/*
+ * Child routine which attempts to remove directories from the
+ * test directory which do not exist.
+ */
+static void test2(int child_num)
{
- /* Child routine which attempts to remove directories from the
- * test directory which do not exist. Runs until a SIGTERM
- * signal is received. Exits with an error if the proper
- * error is not detected or if the remove operation is
- * successful.
- */
int j;
char tmpdir[MAXPATHLEN];
- while (!sigterm) {
+ while (!done) {
for (j = 1; j < nfiles; j += NCHILD) {
sprintf(tmpdir, DIR_NAME, j);
- if (rmdir(tmpdir) < 0) {
- if (errno != ENOENT) {
- tst_brkm(TFAIL, cleanup,
- "RMDIR %s, errno = %d; Wrong error detected.",
- tmpdir, errno);
- exit(1);
- }
- } else {
- tst_brkm(TFAIL, cleanup,
- "RMDIR %s succeded when it should have failed.",
- tmpdir);
- exit(1);
- }
+ TST_EXP_FAIL_SILENT(rmdir(tmpdir), ENOENT);
+ if (!TST_PASS)
+ break;
}
}
- exit(0);
- return 0;
+ tst_res(TPASS, "[%d] remove dirs that do not exist", child_num);
}
-int dochild3(int group)
+/*
+ * Child routine which creates and deletes directories in the
+ * test directory.
+ */
+static void test3(int child_num)
{
- /* Child routine which creates and deletes directories in the
- * test directory. Runs until a SIGTERM signal is received, then
- * cleans up and exits. Detects error if the expected condition
- * is not encountered.
- */
int j;
-
char tmpdir[MAXPATHLEN];
- char tmp[MAXPATHLEN];
- while (!sigterm) {
+ while (!done) {
for (j = 2; j < nfiles; j += NCHILD) {
- strcpy(tmp, DIR_NAME);
- strcat(tmp, ".%d");
- sprintf(tmpdir, tmp, j, group);
-
- TEST(mkdir(tmpdir, MODE_RWX));
-
- if (TEST_RETURN < 0) {
- tst_brkm(TFAIL, cleanup,
- "MKDIR %s, errno = %d; Wrong error detected.",
- tmpdir, TEST_ERRNO);
- exit(1);
- }
+ sprintf(tmpdir, DIR_NAME_GROUP, j, child_num / NCHILD);
+ TST_EXP_PASS_SILENT(mkdir(tmpdir, MODE_RWX));
+ if (!TST_PASS)
+ break;
}
for (j = 2; j < nfiles; j += NCHILD) {
- strcpy(tmp, DIR_NAME);
- strcat(tmp, ".%d");
- sprintf(tmpdir, tmp, j, group);
- if (rmdir(tmpdir) < 0) {
- tst_brkm(TFAIL, cleanup,
- "RMDIR %s, errno = %d; Wrong error detected.",
- tmpdir, errno);
- exit(1);
- }
+ sprintf(tmpdir, DIR_NAME_GROUP, j, child_num / NCHILD);
+ TST_EXP_PASS_SILENT(rmdir(tmpdir));
+ if (!TST_PASS)
+ break;
}
}
- exit(0);
+ tst_res(TPASS, "[%d] create/remove dirs", child_num);
}
-int massmurder(void)
+static void *child_thread_func(void *arg)
{
- register int j;
- for (j = 0; j < child_count; j++) {
- if (pidlist[j] > 0) {
- if (kill(pidlist[j], SIGTERM) < 0) {
- tst_brkm(TFAIL, cleanup,
- "Error killing child %d, ERRNO = %d",
- j, errno);
- }
- }
- }
- return 0;
+ void (*tests[NCHILD])(int) = { test1, test2, test3 };
+ int child_num = (long)arg;
+
+ tests[child_num % NCHILD](child_num);
+
+ /* if any thread failed, make other finish as well */
+ done = 1;
+
+ return NULL;
}
-void setup(void)
+static void verify_mkdir(void)
{
- tst_sig(NOFORK, DEF_HANDLER, cleanup);
+ pthread_t child_thread[NCHILD * child_groups];
+ long i;
+
+ done = 0;
+ for (i = 0; i < child_groups * NCHILD; i++) {
+ SAFE_PTHREAD_CREATE(&child_thread[i], NULL,
+ child_thread_func, (void *)i);
+ }
- TEST_PAUSE;
+ sleep(test_time);
+ done = 1;
- tst_tmpdir();
+ for (i = 0; i < child_groups * NCHILD; i++)
+ SAFE_PTHREAD_JOIN(child_thread[i], NULL);
}
-void cleanup(void)
+static void setup(void)
{
- tst_rmdir();
+ int j;
+ char tmpdir[MAXPATHLEN];
+
+ for (j = 0; j < nfiles; j += NCHILD) {
+ sprintf(tmpdir, DIR_NAME, j);
+ SAFE_MKDIR(tmpdir, MODE_RWX);
+ }
}
+
+static struct tst_test test = {
+ .test_all = verify_mkdir,
+ .needs_tmpdir = 1,
+ .needs_root = 1,
+ .setup = setup,
+ .mount_device = 1,
+ .mntpoint = MNTPOINT,
+ .all_filesystems = 1,
+};
--
2.27.0
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