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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117// SPDX-License-Identifier: GPL-2.0-only/* * Reference tracker self test. * * Copyright (c) 2021 Eric Dumazet <edumazet@google.com> */#include <linux/init.h>#include <linux/module.h>#include <linux/delay.h>#include <linux/ref_tracker.h>#include <linux/slab.h>#include <linux/timer.h>
static struct ref_tracker_dir ref_dir;static struct ref_tracker *tracker[20];
#define TRT_ALLOC(X) static noinline void \ alloctest_ref_tracker_alloc##X(struct ref_tracker_dir *dir, \ struct ref_tracker **trackerp) \ { \ ref_tracker_alloc(dir, trackerp, GFP_KERNEL); \ }
TRT_ALLOC(1)TRT_ALLOC(2)TRT_ALLOC(3)TRT_ALLOC(4)TRT_ALLOC(5)TRT_ALLOC(6)TRT_ALLOC(7)TRT_ALLOC(8)TRT_ALLOC(9)TRT_ALLOC(10)TRT_ALLOC(11)TRT_ALLOC(12)TRT_ALLOC(13)TRT_ALLOC(14)TRT_ALLOC(15)TRT_ALLOC(16)TRT_ALLOC(17)TRT_ALLOC(18)TRT_ALLOC(19)
#undef TRT_ALLOC
static noinline voidalloctest_ref_tracker_free(struct ref_tracker_dir *dir, struct ref_tracker **trackerp){ ref_tracker_free(dir, trackerp);}
static struct timer_list test_ref_tracker_timer;static atomic_t test_ref_timer_done = ATOMIC_INIT(0);
static void test_ref_tracker_timer_func(struct timer_list *t){ ref_tracker_alloc(&ref_dir, &tracker[0], GFP_ATOMIC); atomic_set(&test_ref_timer_done, 1);}
static int __init test_ref_tracker_init(void){ int i;
ref_tracker_dir_init(&ref_dir, 100, "selftest");
timer_setup(&test_ref_tracker_timer, test_ref_tracker_timer_func, 0); mod_timer(&test_ref_tracker_timer, jiffies + 1);
alloctest_ref_tracker_alloc1(&ref_dir, &tracker[1]); alloctest_ref_tracker_alloc2(&ref_dir, &tracker[2]); alloctest_ref_tracker_alloc3(&ref_dir, &tracker[3]); alloctest_ref_tracker_alloc4(&ref_dir, &tracker[4]); alloctest_ref_tracker_alloc5(&ref_dir, &tracker[5]); alloctest_ref_tracker_alloc6(&ref_dir, &tracker[6]); alloctest_ref_tracker_alloc7(&ref_dir, &tracker[7]); alloctest_ref_tracker_alloc8(&ref_dir, &tracker[8]); alloctest_ref_tracker_alloc9(&ref_dir, &tracker[9]); alloctest_ref_tracker_alloc10(&ref_dir, &tracker[10]); alloctest_ref_tracker_alloc11(&ref_dir, &tracker[11]); alloctest_ref_tracker_alloc12(&ref_dir, &tracker[12]); alloctest_ref_tracker_alloc13(&ref_dir, &tracker[13]); alloctest_ref_tracker_alloc14(&ref_dir, &tracker[14]); alloctest_ref_tracker_alloc15(&ref_dir, &tracker[15]); alloctest_ref_tracker_alloc16(&ref_dir, &tracker[16]); alloctest_ref_tracker_alloc17(&ref_dir, &tracker[17]); alloctest_ref_tracker_alloc18(&ref_dir, &tracker[18]); alloctest_ref_tracker_alloc19(&ref_dir, &tracker[19]);
/* free all trackers but first 0 and 1. */ for (i = 2; i < ARRAY_SIZE(tracker); i++) alloctest_ref_tracker_free(&ref_dir, &tracker[i]);
/* Attempt to free an already freed tracker. */ alloctest_ref_tracker_free(&ref_dir, &tracker[2]);
while (!atomic_read(&test_ref_timer_done)) msleep(1);
/* This should warn about tracker[0] & tracker[1] being not freed. */ ref_tracker_dir_exit(&ref_dir);
return 0;}
static void __exit test_ref_tracker_exit(void){}
module_init(test_ref_tracker_init);module_exit(test_ref_tracker_exit);
MODULE_DESCRIPTION("Reference tracker self test");MODULE_LICENSE("GPL v2");