80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* KUnit resource API for test managed resources (allocations, etc.).
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*
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* Copyright (C) 2022, Google LLC.
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* Author: Daniel Latypov <dlatypov@google.com>
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*/
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#include <kunit/resource.h>
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#include <kunit/test.h>
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#include <linux/kref.h>
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/*
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* Used for static resources and when a kunit_resource * has been created by
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* kunit_alloc_resource(). When an init function is supplied, @data is passed
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* into the init function; otherwise, we simply set the resource data field to
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* the data value passed in. Doesn't initialize res->should_kfree.
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*/
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int __kunit_add_resource(struct kunit *test,
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kunit_resource_init_t init,
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kunit_resource_free_t free,
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struct kunit_resource *res,
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void *data)
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{
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int ret = 0;
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unsigned long flags;
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res->free = free;
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kref_init(&res->refcount);
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if (init) {
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ret = init(res, data);
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if (ret)
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return ret;
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} else {
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res->data = data;
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}
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spin_lock_irqsave(&test->lock, flags);
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list_add_tail(&res->node, &test->resources);
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/* refcount for list is established by kref_init() */
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spin_unlock_irqrestore(&test->lock, flags);
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return ret;
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}
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EXPORT_SYMBOL_GPL(__kunit_add_resource);
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void kunit_remove_resource(struct kunit *test, struct kunit_resource *res)
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{
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unsigned long flags;
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bool was_linked;
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spin_lock_irqsave(&test->lock, flags);
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was_linked = !list_empty(&res->node);
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list_del_init(&res->node);
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spin_unlock_irqrestore(&test->lock, flags);
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if (was_linked)
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kunit_put_resource(res);
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}
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EXPORT_SYMBOL_GPL(kunit_remove_resource);
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int kunit_destroy_resource(struct kunit *test, kunit_resource_match_t match,
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void *match_data)
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{
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struct kunit_resource *res = kunit_find_resource(test, match,
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match_data);
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if (!res)
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return -ENOENT;
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kunit_remove_resource(test, res);
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/* We have a reference also via _find(); drop it. */
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kunit_put_resource(res);
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return 0;
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}
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EXPORT_SYMBOL_GPL(kunit_destroy_resource);
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