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1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | #ifndef _LINUX_REF_TRACKER_H | |
3 | #define _LINUX_REF_TRACKER_H | |
4 | #include <linux/refcount.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/spinlock.h> | |
2dba5eb1 | 7 | #include <linux/stackdepot.h> |
4e66934e ED |
8 | |
9 | struct ref_tracker; | |
10 | ||
11 | struct ref_tracker_dir { | |
12 | #ifdef CONFIG_REF_TRACKER | |
13 | spinlock_t lock; | |
14 | unsigned int quarantine_avail; | |
15 | refcount_t untracked; | |
8fd5522f | 16 | refcount_t no_tracker; |
e3ececfe | 17 | bool dead; |
4e66934e ED |
18 | struct list_head list; /* List of active trackers */ |
19 | struct list_head quarantine; /* List of dead trackers */ | |
b6d7c0eb | 20 | char name[32]; |
4e66934e ED |
21 | #endif |
22 | }; | |
23 | ||
24 | #ifdef CONFIG_REF_TRACKER | |
b6d7c0eb | 25 | |
4e66934e | 26 | static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, |
b6d7c0eb AH |
27 | unsigned int quarantine_count, |
28 | const char *name) | |
4e66934e ED |
29 | { |
30 | INIT_LIST_HEAD(&dir->list); | |
31 | INIT_LIST_HEAD(&dir->quarantine); | |
32 | spin_lock_init(&dir->lock); | |
33 | dir->quarantine_avail = quarantine_count; | |
e3ececfe | 34 | dir->dead = false; |
4e66934e | 35 | refcount_set(&dir->untracked, 1); |
8fd5522f | 36 | refcount_set(&dir->no_tracker, 1); |
b6d7c0eb | 37 | strscpy(dir->name, name, sizeof(dir->name)); |
2dba5eb1 | 38 | stack_depot_init(); |
4e66934e ED |
39 | } |
40 | ||
41 | void ref_tracker_dir_exit(struct ref_tracker_dir *dir); | |
42 | ||
7a113ff6 AH |
43 | void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir, |
44 | unsigned int display_limit); | |
45 | ||
4e66934e ED |
46 | void ref_tracker_dir_print(struct ref_tracker_dir *dir, |
47 | unsigned int display_limit); | |
48 | ||
227c6c83 AH |
49 | int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size); |
50 | ||
4e66934e ED |
51 | int ref_tracker_alloc(struct ref_tracker_dir *dir, |
52 | struct ref_tracker **trackerp, gfp_t gfp); | |
53 | ||
54 | int ref_tracker_free(struct ref_tracker_dir *dir, | |
55 | struct ref_tracker **trackerp); | |
56 | ||
57 | #else /* CONFIG_REF_TRACKER */ | |
58 | ||
59 | static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, | |
b6d7c0eb AH |
60 | unsigned int quarantine_count, |
61 | const char *name) | |
4e66934e ED |
62 | { |
63 | } | |
64 | ||
65 | static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir) | |
66 | { | |
67 | } | |
68 | ||
7a113ff6 AH |
69 | static inline void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir, |
70 | unsigned int display_limit) | |
71 | { | |
72 | } | |
73 | ||
4e66934e ED |
74 | static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir, |
75 | unsigned int display_limit) | |
76 | { | |
77 | } | |
78 | ||
227c6c83 AH |
79 | static inline int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, |
80 | char *buf, size_t size) | |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
4e66934e ED |
85 | static inline int ref_tracker_alloc(struct ref_tracker_dir *dir, |
86 | struct ref_tracker **trackerp, | |
87 | gfp_t gfp) | |
88 | { | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static inline int ref_tracker_free(struct ref_tracker_dir *dir, | |
93 | struct ref_tracker **trackerp) | |
94 | { | |
95 | return 0; | |
96 | } | |
97 | ||
98 | #endif | |
99 | ||
100 | #endif /* _LINUX_REF_TRACKER_H */ |