1 /* 2 * Common functions for in-kernel torture tests. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, you can access it online at 16 * http://www.gnu.org/licenses/gpl-2.0.html. 17 * 18 * Copyright IBM Corporation, 2014 19 * 20 * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com> 21 */ 22 23 #ifndef __LINUX_TORTURE_H 24 #define __LINUX_TORTURE_H 25 26 #include <linux/types.h> 27 #include <linux/cache.h> 28 #include <linux/spinlock.h> 29 #include <linux/threads.h> 30 #include <linux/cpumask.h> 31 #include <linux/seqlock.h> 32 #include <linux/lockdep.h> 33 #include <linux/completion.h> 34 #include <linux/debugobjects.h> 35 #include <linux/bug.h> 36 #include <linux/compiler.h> 37 38 /* Definitions for a non-string torture-test module parameter. */ 39 #define torture_param(type, name, init, msg) \ 40 static type name = init; \ 41 module_param(name, type, 0444); \ 42 MODULE_PARM_DESC(name, msg); 43 44 #define TORTURE_FLAG "-torture:" 45 #define TOROUT_STRING(s) \ 46 pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s) 47 #define VERBOSE_TOROUT_STRING(s) \ 48 do { if (verbose) pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s); } while (0) 49 #define VERBOSE_TOROUT_ERRSTRING(s) \ 50 do { if (verbose) pr_alert("%s" TORTURE_FLAG "!!! %s\n", torture_type, s); } while (0) 51 52 /* Definitions for online/offline exerciser. */ 53 bool torture_offline(int cpu, long *n_onl_attempts, long *n_onl_successes, 54 unsigned long *sum_offl, int *min_onl, int *max_onl); 55 bool torture_online(int cpu, long *n_onl_attempts, long *n_onl_successes, 56 unsigned long *sum_onl, int *min_onl, int *max_onl); 57 int torture_onoff_init(long ooholdoff, long oointerval); 58 void torture_onoff_stats(void); 59 bool torture_onoff_failures(void); 60 61 /* Low-rider random number generator. */ 62 struct torture_random_state { 63 unsigned long trs_state; 64 long trs_count; 65 }; 66 #define DEFINE_TORTURE_RANDOM(name) struct torture_random_state name = { 0, 0 } 67 #define DEFINE_TORTURE_RANDOM_PERCPU(name) \ 68 DEFINE_PER_CPU(struct torture_random_state, name) 69 unsigned long torture_random(struct torture_random_state *trsp); 70 71 /* Task shuffler, which causes CPUs to occasionally go idle. */ 72 void torture_shuffle_task_register(struct task_struct *tp); 73 int torture_shuffle_init(long shuffint); 74 75 /* Test auto-shutdown handling. */ 76 void torture_shutdown_absorb(const char *title); 77 int torture_shutdown_init(int ssecs, void (*cleanup)(void)); 78 79 /* Task stuttering, which forces load/no-load transitions. */ 80 void stutter_wait(const char *title); 81 int torture_stutter_init(int s); 82 83 /* Initialization and cleanup. */ 84 bool torture_init_begin(char *ttype, int v); 85 void torture_init_end(void); 86 bool torture_cleanup_begin(void); 87 void torture_cleanup_end(void); 88 bool torture_must_stop(void); 89 bool torture_must_stop_irq(void); 90 void torture_kthread_stopping(char *title); 91 int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m, 92 char *f, struct task_struct **tp); 93 void _torture_stop_kthread(char *m, struct task_struct **tp); 94 95 #define torture_create_kthread(n, arg, tp) \ 96 _torture_create_kthread(n, (arg), #n, "Creating " #n " task", \ 97 "Failed to create " #n, &(tp)) 98 #define torture_stop_kthread(n, tp) \ 99 _torture_stop_kthread("Stopping " #n " task", &(tp)) 100 101 #ifdef CONFIG_PREEMPT 102 #define torture_preempt_schedule() preempt_schedule() 103 #else 104 #define torture_preempt_schedule() 105 #endif 106 107 #endif /* __LINUX_TORTURE_H */ 108