projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| cdebea69 DL |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* | |
| 3 | * KUnit resource API for test managed resources (allocations, etc.). | |
| 4 | * | |
| 5 | * Copyright (C) 2022, Google LLC. | |
| 6 | * Author: Daniel Latypov <dlatypov@google.com> | |
| 7 | */ | |
| 8 | ||
| 9 | #include <kunit/resource.h> | |
| 10 | #include <kunit/test.h> | |
| 11 | #include <linux/kref.h> | |
| 12 | ||
| 13 | /* | |
| 14 | * Used for static resources and when a kunit_resource * has been created by | |
| 15 | * kunit_alloc_resource(). When an init function is supplied, @data is passed | |
| 16 | * into the init function; otherwise, we simply set the resource data field to | |
| ad69172e | 17 | * the data value passed in. Doesn't initialize res->should_kfree. |
| cdebea69 | 18 | */ |
| ad69172e DG |
19 | int __kunit_add_resource(struct kunit *test, |
| 20 | kunit_resource_init_t init, | |
| 21 | kunit_resource_free_t free, | |
| 22 | struct kunit_resource *res, | |
| 23 | void *data) | |
| cdebea69 DL |
24 | { |
| 25 | int ret = 0; | |
| 26 | unsigned long flags; | |
| 27 | ||
| 28 | res->free = free; | |
| 29 | kref_init(&res->refcount); | |
| 30 | ||
| 31 | if (init) { | |
| 32 | ret = init(res, data); | |
| 33 | if (ret) | |
| 34 | return ret; | |
| 35 | } else { | |
| 36 | res->data = data; | |
| 37 | } | |
| 38 | ||
| 39 | spin_lock_irqsave(&test->lock, flags); | |
| 40 | list_add_tail(&res->node, &test->resources); | |
| 41 | /* refcount for list is established by kref_init() */ | |
| 42 | spin_unlock_irqrestore(&test->lock, flags); | |
| 43 | ||
| 44 | return ret; | |
| 45 | } | |
| ad69172e | 46 | EXPORT_SYMBOL_GPL(__kunit_add_resource); |
| cdebea69 DL |
47 | |
| 48 | void kunit_remove_resource(struct kunit *test, struct kunit_resource *res) | |
| 49 | { | |
| 50 | unsigned long flags; | |
| 59729170 | 51 | bool was_linked; |
| cdebea69 DL |
52 | |
| 53 | spin_lock_irqsave(&test->lock, flags); | |
| 59729170 DG |
54 | was_linked = !list_empty(&res->node); |
| 55 | list_del_init(&res->node); | |
| cdebea69 | 56 | spin_unlock_irqrestore(&test->lock, flags); |
| 59729170 DG |
57 | |
| 58 | if (was_linked) | |
| 59 | kunit_put_resource(res); | |
| cdebea69 DL |
60 | } |
| 61 | EXPORT_SYMBOL_GPL(kunit_remove_resource); | |
| 62 | ||
| 63 | int kunit_destroy_resource(struct kunit *test, kunit_resource_match_t match, | |
| 64 | void *match_data) | |
| 65 | { | |
| 66 | struct kunit_resource *res = kunit_find_resource(test, match, | |
| 67 | match_data); | |
| 68 | ||
| 69 | if (!res) | |
| 70 | return -ENOENT; | |
| 71 | ||
| 72 | kunit_remove_resource(test, res); | |
| 73 | ||
| 74 | /* We have a reference also via _find(); drop it. */ | |
| 75 | kunit_put_resource(res); | |
| 76 | ||
| 77 | return 0; | |
| 78 | } | |
| 79 | EXPORT_SYMBOL_GPL(kunit_destroy_resource); |