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707bd05be7
Now that we have dentries and the ability to create meaningful symlinks to them, don't keep a name string in each tracker. Switch the output format to print "class@address", and drop the name field. Also, add a kerneldoc header for ref_tracker_dir_init(). Signed-off-by: Jeff Layton <jlayton@kernel.org> Link: https://patch.msgid.link/20250618-reftrack-dbgfs-v15-9-24fc37ead144@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Reference tracker self test.
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*
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* Copyright (c) 2021 Eric Dumazet <edumazet@google.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/ref_tracker.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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static struct ref_tracker_dir ref_dir;
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static struct ref_tracker *tracker[20];
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#define TRT_ALLOC(X) static noinline void \
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alloctest_ref_tracker_alloc##X(struct ref_tracker_dir *dir, \
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struct ref_tracker **trackerp) \
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{ \
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ref_tracker_alloc(dir, trackerp, GFP_KERNEL); \
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}
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TRT_ALLOC(1)
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TRT_ALLOC(2)
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TRT_ALLOC(3)
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TRT_ALLOC(4)
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TRT_ALLOC(5)
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TRT_ALLOC(6)
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TRT_ALLOC(7)
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TRT_ALLOC(8)
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TRT_ALLOC(9)
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TRT_ALLOC(10)
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TRT_ALLOC(11)
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TRT_ALLOC(12)
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TRT_ALLOC(13)
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TRT_ALLOC(14)
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TRT_ALLOC(15)
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TRT_ALLOC(16)
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TRT_ALLOC(17)
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TRT_ALLOC(18)
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TRT_ALLOC(19)
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#undef TRT_ALLOC
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static noinline void
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alloctest_ref_tracker_free(struct ref_tracker_dir *dir,
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struct ref_tracker **trackerp)
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{
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ref_tracker_free(dir, trackerp);
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}
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static struct timer_list test_ref_tracker_timer;
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static atomic_t test_ref_timer_done = ATOMIC_INIT(0);
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static void test_ref_tracker_timer_func(struct timer_list *t)
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{
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ref_tracker_alloc(&ref_dir, &tracker[0], GFP_ATOMIC);
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atomic_set(&test_ref_timer_done, 1);
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}
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static int __init test_ref_tracker_init(void)
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{
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int i;
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ref_tracker_dir_init(&ref_dir, 100, "selftest");
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timer_setup(&test_ref_tracker_timer, test_ref_tracker_timer_func, 0);
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mod_timer(&test_ref_tracker_timer, jiffies + 1);
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alloctest_ref_tracker_alloc1(&ref_dir, &tracker[1]);
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alloctest_ref_tracker_alloc2(&ref_dir, &tracker[2]);
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alloctest_ref_tracker_alloc3(&ref_dir, &tracker[3]);
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alloctest_ref_tracker_alloc4(&ref_dir, &tracker[4]);
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alloctest_ref_tracker_alloc5(&ref_dir, &tracker[5]);
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alloctest_ref_tracker_alloc6(&ref_dir, &tracker[6]);
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alloctest_ref_tracker_alloc7(&ref_dir, &tracker[7]);
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alloctest_ref_tracker_alloc8(&ref_dir, &tracker[8]);
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alloctest_ref_tracker_alloc9(&ref_dir, &tracker[9]);
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alloctest_ref_tracker_alloc10(&ref_dir, &tracker[10]);
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alloctest_ref_tracker_alloc11(&ref_dir, &tracker[11]);
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alloctest_ref_tracker_alloc12(&ref_dir, &tracker[12]);
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alloctest_ref_tracker_alloc13(&ref_dir, &tracker[13]);
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alloctest_ref_tracker_alloc14(&ref_dir, &tracker[14]);
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alloctest_ref_tracker_alloc15(&ref_dir, &tracker[15]);
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alloctest_ref_tracker_alloc16(&ref_dir, &tracker[16]);
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alloctest_ref_tracker_alloc17(&ref_dir, &tracker[17]);
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alloctest_ref_tracker_alloc18(&ref_dir, &tracker[18]);
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alloctest_ref_tracker_alloc19(&ref_dir, &tracker[19]);
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/* free all trackers but first 0 and 1. */
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for (i = 2; i < ARRAY_SIZE(tracker); i++)
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alloctest_ref_tracker_free(&ref_dir, &tracker[i]);
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/* Attempt to free an already freed tracker. */
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alloctest_ref_tracker_free(&ref_dir, &tracker[2]);
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while (!atomic_read(&test_ref_timer_done))
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msleep(1);
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/* This should warn about tracker[0] & tracker[1] being not freed. */
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ref_tracker_dir_exit(&ref_dir);
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return 0;
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}
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static void __exit test_ref_tracker_exit(void)
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{
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}
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module_init(test_ref_tracker_init);
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module_exit(test_ref_tracker_exit);
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MODULE_DESCRIPTION("Reference tracker self test");
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MODULE_LICENSE("GPL v2");
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