projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 4e66934e ED |
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 */ | |
| 20 | #endif | |
| 21 | }; | |
| 22 | ||
| 23 | #ifdef CONFIG_REF_TRACKER | |
| 24 | static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, | |
| 25 | unsigned int quarantine_count) | |
| 26 | { | |
| 27 | INIT_LIST_HEAD(&dir->list); | |
| 28 | INIT_LIST_HEAD(&dir->quarantine); | |
| 29 | spin_lock_init(&dir->lock); | |
| 30 | dir->quarantine_avail = quarantine_count; | |
| e3ececfe | 31 | dir->dead = false; |
| 4e66934e | 32 | refcount_set(&dir->untracked, 1); |
| 8fd5522f | 33 | refcount_set(&dir->no_tracker, 1); |
| 2dba5eb1 | 34 | stack_depot_init(); |
| 4e66934e ED |
35 | } |
| 36 | ||
| 37 | void ref_tracker_dir_exit(struct ref_tracker_dir *dir); | |
| 38 | ||
| 39 | void ref_tracker_dir_print(struct ref_tracker_dir *dir, | |
| 40 | unsigned int display_limit); | |
| 41 | ||
| 42 | int ref_tracker_alloc(struct ref_tracker_dir *dir, | |
| 43 | struct ref_tracker **trackerp, gfp_t gfp); | |
| 44 | ||
| 45 | int ref_tracker_free(struct ref_tracker_dir *dir, | |
| 46 | struct ref_tracker **trackerp); | |
| 47 | ||
| 48 | #else /* CONFIG_REF_TRACKER */ | |
| 49 | ||
| 50 | static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, | |
| 51 | unsigned int quarantine_count) | |
| 52 | { | |
| 53 | } | |
| 54 | ||
| 55 | static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir) | |
| 56 | { | |
| 57 | } | |
| 58 | ||
| 59 | static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir, | |
| 60 | unsigned int display_limit) | |
| 61 | { | |
| 62 | } | |
| 63 | ||
| 64 | static inline int ref_tracker_alloc(struct ref_tracker_dir *dir, | |
| 65 | struct ref_tracker **trackerp, | |
| 66 | gfp_t gfp) | |
| 67 | { | |
| 68 | return 0; | |
| 69 | } | |
| 70 | ||
| 71 | static inline int ref_tracker_free(struct ref_tracker_dir *dir, | |
| 72 | struct ref_tracker **trackerp) | |
| 73 | { | |
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | #endif | |
| 78 | ||
| 79 | #endif /* _LINUX_REF_TRACKER_H */ |