#include "splat-internal.h"
-#define SPLAT_MUTEX_NAME "mutex"
-#define SPLAT_MUTEX_DESC "Kernel Mutex Tests"
+#define SPLAT_MUTEX_NAME "mutex"
+#define SPLAT_MUTEX_DESC "Kernel Mutex Tests"
-#define SPLAT_MUTEX_TEST1_ID 0x0401
-#define SPLAT_MUTEX_TEST1_NAME "tryenter"
-#define SPLAT_MUTEX_TEST1_DESC "Validate mutex_tryenter() correctness"
+#define SPLAT_MUTEX_TEST1_ID 0x0401
+#define SPLAT_MUTEX_TEST1_NAME "tryenter"
+#define SPLAT_MUTEX_TEST1_DESC "Validate mutex_tryenter() correctness"
-#define SPLAT_MUTEX_TEST2_ID 0x0402
-#define SPLAT_MUTEX_TEST2_NAME "race"
-#define SPLAT_MUTEX_TEST2_DESC "Many threads entering/exiting the mutex"
+#define SPLAT_MUTEX_TEST2_ID 0x0402
+#define SPLAT_MUTEX_TEST2_NAME "race"
+#define SPLAT_MUTEX_TEST2_DESC "Many threads entering/exiting the mutex"
-#define SPLAT_MUTEX_TEST3_ID 0x0403
-#define SPLAT_MUTEX_TEST3_NAME "owned"
-#define SPLAT_MUTEX_TEST3_DESC "Validate mutex_owned() correctness"
+#define SPLAT_MUTEX_TEST3_ID 0x0403
+#define SPLAT_MUTEX_TEST3_NAME "owned"
+#define SPLAT_MUTEX_TEST3_DESC "Validate mutex_owned() correctness"
-#define SPLAT_MUTEX_TEST4_ID 0x0404
-#define SPLAT_MUTEX_TEST4_NAME "owner"
-#define SPLAT_MUTEX_TEST4_DESC "Validate mutex_owner() correctness"
+#define SPLAT_MUTEX_TEST4_ID 0x0404
+#define SPLAT_MUTEX_TEST4_NAME "owner"
+#define SPLAT_MUTEX_TEST4_DESC "Validate mutex_owner() correctness"
-#define SPLAT_MUTEX_TEST_MAGIC 0x115599DDUL
-#define SPLAT_MUTEX_TEST_NAME "mutex_test"
-#define SPLAT_MUTEX_TEST_TASKQ "mutex_taskq"
-#define SPLAT_MUTEX_TEST_COUNT 128
+#define SPLAT_MUTEX_TEST_MAGIC 0x115599DDUL
+#define SPLAT_MUTEX_TEST_NAME "mutex_test"
+#define SPLAT_MUTEX_TEST_TASKQ "mutex_taskq"
+#define SPLAT_MUTEX_TEST_COUNT 128
typedef struct mutex_priv {
unsigned long mp_magic;
struct file *mp_file;
- kmutex_t mp_mtx;
- int mp_rc;
+ kmutex_t mp_mtx;
+ int mp_rc;
} mutex_priv_t;
static void
splat_mutex_test1_func(void *arg)
{
- mutex_priv_t *mp = (mutex_priv_t *)arg;
- ASSERT(mp->mp_magic == SPLAT_MUTEX_TEST_MAGIC);
-
- if (mutex_tryenter(&mp->mp_mtx)) {
- mp->mp_rc = 0;
- mutex_exit(&mp->mp_mtx);
- } else {
- mp->mp_rc = -EBUSY;
- }
+ mutex_priv_t *mp = (mutex_priv_t *)arg;
+ ASSERT(mp->mp_magic == SPLAT_MUTEX_TEST_MAGIC);
+
+ if (mutex_tryenter(&mp->mp_mtx)) {
+ mp->mp_rc = 0;
+ mutex_exit(&mp->mp_mtx);
+ } else {
+ mp->mp_rc = -EBUSY;
+ }
}
static int
splat_mutex_test1(struct file *file, void *arg)
{
- mutex_priv_t *mp;
- taskq_t *tq;
- int id, rc = 0;
-
- mp = (mutex_priv_t *)kmalloc(sizeof(*mp), GFP_KERNEL);
- if (mp == NULL)
- return -ENOMEM;
-
- tq = taskq_create(SPLAT_MUTEX_TEST_TASKQ, 1, maxclsyspri,
- 50, INT_MAX, TASKQ_PREPOPULATE);
- if (tq == NULL) {
- rc = -ENOMEM;
- goto out2;
- }
-
- mp->mp_magic = SPLAT_MUTEX_TEST_MAGIC;
- mp->mp_file = file;
- mutex_init(&mp->mp_mtx, SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
- mutex_enter(&mp->mp_mtx);
-
- /*
- * Schedule a task function which will try and acquire the mutex via
- * mutex_tryenter() while it's held. This should fail and the task
- * function will indicate this status in the passed private data.
- */
- mp->mp_rc = -EINVAL;
- id = taskq_dispatch(tq, splat_mutex_test1_func, mp, TQ_SLEEP);
- if (id == 0) {
- mutex_exit(&mp->mp_mtx);
- splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
- "taskq_dispatch() failed\n");
- rc = -EINVAL;
- goto out;
- }
-
- taskq_wait_id(tq, id);
- mutex_exit(&mp->mp_mtx);
-
- /* Task function successfully acquired mutex, very bad! */
- if (mp->mp_rc != -EBUSY) {
- splat_vprint(file, SPLAT_MUTEX_TEST1_NAME,
- "mutex_trylock() incorrectly succeeded when "
- "the mutex was held, %d/%d\n", id, mp->mp_rc);
- rc = -EINVAL;
- goto out;
- } else {
- splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
- "mutex_trylock() correctly failed when "
- "the mutex was held\n");
- }
-
- /*
- * Schedule a task function which will try and acquire the mutex via
- * mutex_tryenter() while it is not held. This should succeed and
- * can be verified by checking the private data.
- */
- mp->mp_rc = -EINVAL;
- id = taskq_dispatch(tq, splat_mutex_test1_func, mp, TQ_SLEEP);
- if (id == 0) {
- splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
- "taskq_dispatch() failed\n");
- rc = -EINVAL;
- goto out;
- }
-
- taskq_wait_id(tq, id);
-
- /* Task function failed to acquire mutex, very bad! */
- if (mp->mp_rc != 0) {
- splat_vprint(file, SPLAT_MUTEX_TEST1_NAME,
- "mutex_trylock() incorrectly failed when "
- "the mutex was not held, %d/%d\n", id, mp->mp_rc);
- rc = -EINVAL;
- } else {
- splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
- "mutex_trylock() correctly succeeded "
- "when the mutex was not held\n");
- }
+ mutex_priv_t *mp;
+ taskq_t *tq;
+ int id, rc = 0;
+
+ mp = (mutex_priv_t *)kmalloc(sizeof(*mp), GFP_KERNEL);
+ if (mp == NULL)
+ return -ENOMEM;
+
+ tq = taskq_create(SPLAT_MUTEX_TEST_TASKQ, 1, maxclsyspri,
+ 50, INT_MAX, TASKQ_PREPOPULATE);
+ if (tq == NULL) {
+ rc = -ENOMEM;
+ goto out2;
+ }
+
+ mp->mp_magic = SPLAT_MUTEX_TEST_MAGIC;
+ mp->mp_file = file;
+ mutex_init(&mp->mp_mtx, SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
+ mutex_enter(&mp->mp_mtx);
+
+ /*
+ * Schedule a task function which will try and acquire the mutex via
+ * mutex_tryenter() while it's held. This should fail and the task
+ * function will indicate this status in the passed private data.
+ */
+ mp->mp_rc = -EINVAL;
+ id = taskq_dispatch(tq, splat_mutex_test1_func, mp, TQ_SLEEP);
+ if (id == 0) {
+ mutex_exit(&mp->mp_mtx);
+ splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
+ "taskq_dispatch() failed\n");
+ rc = -EINVAL;
+ goto out;
+ }
+
+ taskq_wait_id(tq, id);
+ mutex_exit(&mp->mp_mtx);
+
+ /* Task function successfully acquired mutex, very bad! */
+ if (mp->mp_rc != -EBUSY) {
+ splat_vprint(file, SPLAT_MUTEX_TEST1_NAME,
+ "mutex_trylock() incorrectly succeeded when "
+ "the mutex was held, %d/%d\n", id, mp->mp_rc);
+ rc = -EINVAL;
+ goto out;
+ } else {
+ splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
+ "mutex_trylock() correctly failed when "
+ "the mutex was held\n");
+ }
+
+ /*
+ * Schedule a task function which will try and acquire the mutex via
+ * mutex_tryenter() while it is not held. This should succeed and
+ * can be verified by checking the private data.
+ */
+ mp->mp_rc = -EINVAL;
+ id = taskq_dispatch(tq, splat_mutex_test1_func, mp, TQ_SLEEP);
+ if (id == 0) {
+ splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
+ "taskq_dispatch() failed\n");
+ rc = -EINVAL;
+ goto out;
+ }
+
+ taskq_wait_id(tq, id);
+
+ /* Task function failed to acquire mutex, very bad! */
+ if (mp->mp_rc != 0) {
+ splat_vprint(file, SPLAT_MUTEX_TEST1_NAME,
+ "mutex_trylock() incorrectly failed when "
+ "the mutex was not held, %d/%d\n", id, mp->mp_rc);
+ rc = -EINVAL;
+ } else {
+ splat_vprint(file, SPLAT_MUTEX_TEST1_NAME, "%s",
+ "mutex_trylock() correctly succeeded "
+ "when the mutex was not held\n");
+ }
out:
- taskq_destroy(tq);
- mutex_destroy(&(mp->mp_mtx));
+ taskq_destroy(tq);
+ mutex_destroy(&(mp->mp_mtx));
out2:
- kfree(mp);
- return rc;
+ kfree(mp);
+ return rc;
}
static void
splat_mutex_test2_func(void *arg)
{
- mutex_priv_t *mp = (mutex_priv_t *)arg;
- int rc;
- ASSERT(mp->mp_magic == SPLAT_MUTEX_TEST_MAGIC);
-
- /* Read the value before sleeping and write it after we wake up to
- * maximize the chance of a race if mutexs are not working properly */
- mutex_enter(&mp->mp_mtx);
- rc = mp->mp_rc;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ / 100); /* 1/100 of a second */
- VERIFY(mp->mp_rc == rc);
- mp->mp_rc = rc + 1;
- mutex_exit(&mp->mp_mtx);
+ mutex_priv_t *mp = (mutex_priv_t *)arg;
+ int rc;
+ ASSERT(mp->mp_magic == SPLAT_MUTEX_TEST_MAGIC);
+
+ /* Read the value before sleeping and write it after we wake up to
+ * maximize the chance of a race if mutexs are not working properly */
+ mutex_enter(&mp->mp_mtx);
+ rc = mp->mp_rc;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ / 100); /* 1/100 of a second */
+ VERIFY(mp->mp_rc == rc);
+ mp->mp_rc = rc + 1;
+ mutex_exit(&mp->mp_mtx);
}
static int
splat_mutex_test2(struct file *file, void *arg)
{
- mutex_priv_t *mp;
- taskq_t *tq;
- int i, rc = 0;
-
- mp = (mutex_priv_t *)kmalloc(sizeof(*mp), GFP_KERNEL);
- if (mp == NULL)
- return -ENOMEM;
-
- /* Create several threads allowing tasks to race with each other */
- tq = taskq_create(SPLAT_MUTEX_TEST_TASKQ, num_online_cpus(),
- maxclsyspri, 50, INT_MAX, TASKQ_PREPOPULATE);
- if (tq == NULL) {
- rc = -ENOMEM;
- goto out;
- }
-
- mp->mp_magic = SPLAT_MUTEX_TEST_MAGIC;
- mp->mp_file = file;
- mutex_init(&(mp->mp_mtx), SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
- mp->mp_rc = 0;
-
- /*
- * Schedule N work items to the work queue each of which enters the
- * mutex, sleeps briefly, then exits the mutex. On a multiprocessor
- * box these work items will be handled by all available CPUs. The
- * task function checks to ensure the tracked shared variable is
- * always only incremented by one. Additionally, the mutex itself
- * is instrumented such that if any two processors are in the
- * critical region at the same time the system will panic. If the
- * mutex is implemented right this will never happy, that's a pass.
- */
- for (i = 0; i < SPLAT_MUTEX_TEST_COUNT; i++) {
- if (!taskq_dispatch(tq, splat_mutex_test2_func, mp, TQ_SLEEP)) {
- splat_vprint(file, SPLAT_MUTEX_TEST2_NAME,
- "Failed to queue task %d\n", i);
- rc = -EINVAL;
- }
- }
-
- taskq_wait(tq);
-
- if (mp->mp_rc == SPLAT_MUTEX_TEST_COUNT) {
- splat_vprint(file, SPLAT_MUTEX_TEST2_NAME, "%d racing threads "
- "correctly entered/exited the mutex %d times\n",
- num_online_cpus(), mp->mp_rc);
- } else {
- splat_vprint(file, SPLAT_MUTEX_TEST2_NAME, "%d racing threads "
- "only processed %d/%d mutex work items\n",
- num_online_cpus(),mp->mp_rc,SPLAT_MUTEX_TEST_COUNT);
- rc = -EINVAL;
- }
-
- taskq_destroy(tq);
- mutex_destroy(&(mp->mp_mtx));
+ mutex_priv_t *mp;
+ taskq_t *tq;
+ int i, rc = 0;
+
+ mp = (mutex_priv_t *)kmalloc(sizeof(*mp), GFP_KERNEL);
+ if (mp == NULL)
+ return -ENOMEM;
+
+ /* Create several threads allowing tasks to race with each other */
+ tq = taskq_create(SPLAT_MUTEX_TEST_TASKQ, num_online_cpus(),
+ maxclsyspri, 50, INT_MAX, TASKQ_PREPOPULATE);
+ if (tq == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ mp->mp_magic = SPLAT_MUTEX_TEST_MAGIC;
+ mp->mp_file = file;
+ mutex_init(&(mp->mp_mtx), SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
+ mp->mp_rc = 0;
+
+ /*
+ * Schedule N work items to the work queue each of which enters the
+ * mutex, sleeps briefly, then exits the mutex. On a multiprocessor
+ * box these work items will be handled by all available CPUs. The
+ * task function checks to ensure the tracked shared variable is
+ * always only incremented by one. Additionally, the mutex itself
+ * is instrumented such that if any two processors are in the
+ * critical region at the same time the system will panic. If the
+ * mutex is implemented right this will never happy, that's a pass.
+ */
+ for (i = 0; i < SPLAT_MUTEX_TEST_COUNT; i++) {
+ if (!taskq_dispatch(tq, splat_mutex_test2_func, mp, TQ_SLEEP)) {
+ splat_vprint(file, SPLAT_MUTEX_TEST2_NAME,
+ "Failed to queue task %d\n", i);
+ rc = -EINVAL;
+ }
+ }
+
+ taskq_wait(tq);
+
+ if (mp->mp_rc == SPLAT_MUTEX_TEST_COUNT) {
+ splat_vprint(file, SPLAT_MUTEX_TEST2_NAME, "%d racing threads "
+ "correctly entered/exited the mutex %d times\n",
+ num_online_cpus(), mp->mp_rc);
+ } else {
+ splat_vprint(file, SPLAT_MUTEX_TEST2_NAME, "%d racing threads "
+ "only processed %d/%d mutex work items\n",
+ num_online_cpus(),mp->mp_rc,SPLAT_MUTEX_TEST_COUNT);
+ rc = -EINVAL;
+ }
+
+ taskq_destroy(tq);
+ mutex_destroy(&(mp->mp_mtx));
out:
- kfree(mp);
- return rc;
+ kfree(mp);
+ return rc;
}
static int
splat_mutex_test3(struct file *file, void *arg)
{
kmutex_t mtx;
- int rc = 0;
+ int rc = 0;
- mutex_init(&mtx, SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
+ mutex_init(&mtx, SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
+ mutex_enter(&mtx);
- mutex_enter(&mtx);
+ /* Mutex should be owned by current */
+ if (!mutex_owned(&mtx)) {
+ splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Unowned mutex "
+ "should be owned by pid %d\n", current->pid);
+ rc = -EINVAL;
+ goto out;
+ }
- /* Mutex should be owned by current */
- if (!mutex_owned(&mtx)) {
- splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex should "
- "be owned by pid %d but is owned by pid %d\n",
- current->pid, mtx.km_owner ? mtx.km_owner->pid : -1);
- rc = -EINVAL;
- goto out;
- }
+ mutex_exit(&mtx);
- mutex_exit(&mtx);
-
- /* Mutex should not be owned by any task */
- if (mutex_owned(&mtx)) {
- splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex should "
- "not be owned but is owned by pid %d\n",
- mtx.km_owner ? mtx.km_owner->pid : -1);
- rc = -EINVAL;
- goto out;
- }
+ /* Mutex should not be owned by any task */
+ if (mutex_owned(&mtx)) {
+ splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex owned by "
+ "pid %d should be unowned\b", current->pid);
+ rc = -EINVAL;
+ goto out;
+ }
splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "%s",
- "Correct mutex_owned() behavior\n");
+ "Correct mutex_owned() behavior\n");
out:
- mutex_destroy(&mtx);
+ mutex_destroy(&mtx);
- return rc;
+ return rc;
}
static int
splat_mutex_test4(struct file *file, void *arg)
{
kmutex_t mtx;
- kthread_t *owner;
- int rc = 0;
-
- mutex_init(&mtx, SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
-
- mutex_enter(&mtx);
-
- /* Mutex should be owned by current */
- owner = mutex_owner(&mtx);
- if (current != owner) {
- splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex should "
- "be owned by pid %d but is owned by pid %d\n",
- current->pid, owner ? owner->pid : -1);
- rc = -EINVAL;
- goto out;
- }
-
- mutex_exit(&mtx);
-
- /* Mutex should not be owned by any task */
- owner = mutex_owner(&mtx);
- if (owner) {
- splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex should not "
- "be owned but is owned by pid %d\n", owner->pid);
- rc = -EINVAL;
- goto out;
- }
+ kthread_t *owner;
+ int rc = 0;
+
+ mutex_init(&mtx, SPLAT_MUTEX_TEST_NAME, MUTEX_DEFAULT, NULL);
+ mutex_enter(&mtx);
+
+ /* Mutex should be owned by current */
+ owner = mutex_owner(&mtx);
+ if (current != owner) {
+ splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex should "
+ "be owned by pid %d but is owned by pid %d\n",
+ current->pid, owner ? owner->pid : -1);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ mutex_exit(&mtx);
+
+ /* Mutex should not be owned by any task */
+ owner = mutex_owner(&mtx);
+ if (owner) {
+ splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "Mutex should not "
+ "be owned but is owned by pid %d\n", owner->pid);
+ rc = -EINVAL;
+ goto out;
+ }
splat_vprint(file, SPLAT_MUTEX_TEST3_NAME, "%s",
- "Correct mutex_owner() behavior\n");
+ "Correct mutex_owner() behavior\n");
out:
- mutex_destroy(&mtx);
+ mutex_destroy(&mtx);
- return rc;
+ return rc;
}
splat_subsystem_t *
projects / mirror_spl-debian.git / blobdiff