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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Common functions for in-kernel torture tests.
- *
- * Copyright IBM Corporation, 2014
- *
- * Author: Paul E. McKenney <[email protected]>
- */
- #ifndef __LINUX_TORTURE_H
- #define __LINUX_TORTURE_H
- #include <linux/types.h>
- #include <linux/cache.h>
- #include <linux/spinlock.h>
- #include <linux/threads.h>
- #include <linux/cpumask.h>
- #include <linux/seqlock.h>
- #include <linux/lockdep.h>
- #include <linux/completion.h>
- #include <linux/debugobjects.h>
- #include <linux/bug.h>
- #include <linux/compiler.h>
- /* Definitions for a non-string torture-test module parameter. */
- #define torture_param(type, name, init, msg) \
- static type name = init; \
- module_param(name, type, 0444); \
- MODULE_PARM_DESC(name, msg);
- #define TORTURE_FLAG "-torture:"
- #define TOROUT_STRING(s) \
- pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s)
- #define VERBOSE_TOROUT_STRING(s) \
- do { \
- if (verbose) { \
- verbose_torout_sleep(); \
- pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s); \
- } \
- } while (0)
- #define TOROUT_ERRSTRING(s) \
- pr_alert("%s" TORTURE_FLAG "!!! %s\n", torture_type, s)
- void verbose_torout_sleep(void);
- #define torture_init_error(firsterr) \
- ({ \
- int ___firsterr = (firsterr); \
- \
- WARN_ONCE(!IS_MODULE(CONFIG_RCU_TORTURE_TEST) && ___firsterr < 0, "Torture-test initialization failed with error code %d\n", ___firsterr); \
- ___firsterr < 0; \
- })
- /* Definitions for online/offline exerciser. */
- #ifdef CONFIG_HOTPLUG_CPU
- int torture_num_online_cpus(void);
- #else /* #ifdef CONFIG_HOTPLUG_CPU */
- static inline int torture_num_online_cpus(void) { return 1; }
- #endif /* #else #ifdef CONFIG_HOTPLUG_CPU */
- typedef void torture_ofl_func(void);
- bool torture_offline(int cpu, long *n_onl_attempts, long *n_onl_successes,
- unsigned long *sum_offl, int *min_onl, int *max_onl);
- bool torture_online(int cpu, long *n_onl_attempts, long *n_onl_successes,
- unsigned long *sum_onl, int *min_onl, int *max_onl);
- int torture_onoff_init(long ooholdoff, long oointerval, torture_ofl_func *f);
- void torture_onoff_stats(void);
- bool torture_onoff_failures(void);
- /* Low-rider random number generator. */
- struct torture_random_state {
- unsigned long trs_state;
- long trs_count;
- };
- #define DEFINE_TORTURE_RANDOM(name) struct torture_random_state name = { 0, 0 }
- #define DEFINE_TORTURE_RANDOM_PERCPU(name) \
- DEFINE_PER_CPU(struct torture_random_state, name)
- unsigned long torture_random(struct torture_random_state *trsp);
- static inline void torture_random_init(struct torture_random_state *trsp)
- {
- trsp->trs_state = 0;
- trsp->trs_count = 0;
- }
- /* Definitions for high-resolution-timer sleeps. */
- int torture_hrtimeout_ns(ktime_t baset_ns, u32 fuzzt_ns, struct torture_random_state *trsp);
- int torture_hrtimeout_us(u32 baset_us, u32 fuzzt_ns, struct torture_random_state *trsp);
- int torture_hrtimeout_ms(u32 baset_ms, u32 fuzzt_us, struct torture_random_state *trsp);
- int torture_hrtimeout_jiffies(u32 baset_j, struct torture_random_state *trsp);
- int torture_hrtimeout_s(u32 baset_s, u32 fuzzt_ms, struct torture_random_state *trsp);
- /* Task shuffler, which causes CPUs to occasionally go idle. */
- void torture_shuffle_task_register(struct task_struct *tp);
- int torture_shuffle_init(long shuffint);
- /* Test auto-shutdown handling. */
- void torture_shutdown_absorb(const char *title);
- int torture_shutdown_init(int ssecs, void (*cleanup)(void));
- /* Task stuttering, which forces load/no-load transitions. */
- bool stutter_wait(const char *title);
- int torture_stutter_init(int s, int sgap);
- /* Initialization and cleanup. */
- bool torture_init_begin(char *ttype, int v);
- void torture_init_end(void);
- bool torture_cleanup_begin(void);
- void torture_cleanup_end(void);
- bool torture_must_stop(void);
- bool torture_must_stop_irq(void);
- void torture_kthread_stopping(char *title);
- int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
- char *f, struct task_struct **tp);
- void _torture_stop_kthread(char *m, struct task_struct **tp);
- #define torture_create_kthread(n, arg, tp) \
- _torture_create_kthread(n, (arg), #n, "Creating " #n " task", \
- "Failed to create " #n, &(tp))
- #define torture_stop_kthread(n, tp) \
- _torture_stop_kthread("Stopping " #n " task", &(tp))
- #ifdef CONFIG_PREEMPTION
- #define torture_preempt_schedule() __preempt_schedule()
- #else
- #define torture_preempt_schedule() do { } while (0)
- #endif
- #endif /* __LINUX_TORTURE_H */
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