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/*
* This file is part of the SPL: Solaris Porting Layer.
*
* Copyright (c) 2008 Lawrence Livermore National Security, LLC.
* Produced at Lawrence Livermore National Laboratory
* Written by:
* Brian Behlendorf <behlendorf1@llnl.gov>,
* Herb Wartens <wartens2@llnl.gov>,
* Jim Garlick <garlick@llnl.gov>
* UCRL-CODE-235197
*
* This 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 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.
*/
#include "splat-internal.h"
#define SPLAT_SUBSYSTEM_THREAD 0x0600
#define SPLAT_THREAD_NAME "thread"
#define SPLAT_THREAD_DESC "Kernel Thread Tests"
#define SPLAT_THREAD_TEST1_ID 0x0601
#define SPLAT_THREAD_TEST1_NAME "create"
#define SPLAT_THREAD_TEST1_DESC "Validate thread creation"
#define SPLAT_THREAD_TEST2_ID 0x0602
#define SPLAT_THREAD_TEST2_NAME "exit"
#define SPLAT_THREAD_TEST2_DESC "Validate thread exit"
#define SPLAT_THREAD_TEST_MAGIC 0x4488CC00UL
typedef struct thread_priv {
unsigned long tp_magic;
struct file *tp_file;
spinlock_t tp_lock;
wait_queue_head_t tp_waitq;
int tp_rc;
} thread_priv_t;
static int
splat_thread_rc(thread_priv_t *tp, int rc)
{
int ret;
spin_lock(&tp->tp_lock);
ret = (tp->tp_rc == rc);
spin_unlock(&tp->tp_lock);
return ret;
}
static void
splat_thread_work1(void *priv)
{
thread_priv_t *tp = (thread_priv_t *)priv;
spin_lock(&tp->tp_lock);
ASSERT(tp->tp_magic == SPLAT_THREAD_TEST_MAGIC);
tp->tp_rc = 1;
spin_unlock(&tp->tp_lock);
wake_up(&tp->tp_waitq);
thread_exit();
}
static int
splat_thread_test1(struct file *file, void *arg)
{
thread_priv_t tp;
kthread_t *thr;
tp.tp_magic = SPLAT_THREAD_TEST_MAGIC;
tp.tp_file = file;
spin_lock_init(&tp.tp_lock);
init_waitqueue_head(&tp.tp_waitq);
tp.tp_rc = 0;
thr = (kthread_t *)thread_create(NULL, 0, splat_thread_work1, &tp, 0,
&p0, TS_RUN, minclsyspri);
/* Must never fail under Solaris, but we check anyway since this
* can happen in the linux SPL, we may want to change this behavior */
if (thr == NULL)
return -ESRCH;
/* Sleep until the thread sets tp.tp_rc == 1 */
wait_event(tp.tp_waitq, splat_thread_rc(&tp, 1));
splat_vprint(file, SPLAT_THREAD_TEST1_NAME, "%s",
"Thread successfully started properly\n");
return 0;
}
static void
splat_thread_work2(void *priv)
{
thread_priv_t *tp = (thread_priv_t *)priv;
spin_lock(&tp->tp_lock);
ASSERT(tp->tp_magic == SPLAT_THREAD_TEST_MAGIC);
tp->tp_rc = 1;
spin_unlock(&tp->tp_lock);
wake_up(&tp->tp_waitq);
thread_exit();
/* The following code is unreachable when thread_exit() is
* working properly, which is exactly what we're testing */
spin_lock(&tp->tp_lock);
tp->tp_rc = 2;
spin_unlock(&tp->tp_lock);
wake_up(&tp->tp_waitq);
}
static int
splat_thread_test2(struct file *file, void *arg)
{
thread_priv_t tp;
kthread_t *thr;
int rc = 0;
tp.tp_magic = SPLAT_THREAD_TEST_MAGIC;
tp.tp_file = file;
spin_lock_init(&tp.tp_lock);
init_waitqueue_head(&tp.tp_waitq);
tp.tp_rc = 0;
thr = (kthread_t *)thread_create(NULL, 0, splat_thread_work2, &tp, 0,
&p0, TS_RUN, minclsyspri);
/* Must never fail under Solaris, but we check anyway since this
* can happen in the linux SPL, we may want to change this behavior */
if (thr == NULL)
return -ESRCH;
/* Sleep until the thread sets tp.tp_rc == 1 */
wait_event(tp.tp_waitq, splat_thread_rc(&tp, 1));
/* Sleep until the thread sets tp.tp_rc == 2, or until we hit
* the timeout. If thread exit is working properly we should
* hit the timeout and never see to.tp_rc == 2. */
rc = wait_event_timeout(tp.tp_waitq, splat_thread_rc(&tp, 2), HZ / 10);
if (rc > 0) {
rc = -EINVAL;
splat_vprint(file, SPLAT_THREAD_TEST2_NAME, "%s",
"Thread did not exit properly at thread_exit()\n");
} else {
splat_vprint(file, SPLAT_THREAD_TEST2_NAME, "%s",
"Thread successfully exited at thread_exit()\n");
}
return rc;
}
splat_subsystem_t *
splat_thread_init(void)
{
splat_subsystem_t *sub;
sub = kmalloc(sizeof(*sub), GFP_KERNEL);
if (sub == NULL)
return NULL;
memset(sub, 0, sizeof(*sub));
strncpy(sub->desc.name, SPLAT_THREAD_NAME, SPLAT_NAME_SIZE);
strncpy(sub->desc.desc, SPLAT_THREAD_DESC, SPLAT_DESC_SIZE);
INIT_LIST_HEAD(&sub->subsystem_list);
INIT_LIST_HEAD(&sub->test_list);
spin_lock_init(&sub->test_lock);
sub->desc.id = SPLAT_SUBSYSTEM_THREAD;
SPLAT_TEST_INIT(sub, SPLAT_THREAD_TEST1_NAME, SPLAT_THREAD_TEST1_DESC,
SPLAT_THREAD_TEST1_ID, splat_thread_test1);
SPLAT_TEST_INIT(sub, SPLAT_THREAD_TEST2_NAME, SPLAT_THREAD_TEST2_DESC,
SPLAT_THREAD_TEST2_ID, splat_thread_test2);
return sub;
}
void
splat_thread_fini(splat_subsystem_t *sub)
{
ASSERT(sub);
SPLAT_TEST_FINI(sub, SPLAT_THREAD_TEST2_ID);
SPLAT_TEST_FINI(sub, SPLAT_THREAD_TEST1_ID);
kfree(sub);
}
int
splat_thread_id(void) {
return SPLAT_SUBSYSTEM_THREAD;
}
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