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