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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143// SPDX-License-Identifier: GPL-2.0-or-later#ifndef _LINUX_REF_TRACKER_H#define _LINUX_REF_TRACKER_H#include <linux/refcount.h>#include <linux/types.h>#include <linux/spinlock.h>#include <linux/stackdepot.h>
#define __ostream_printf __printf(2, 3)
struct ref_tracker;
struct ref_tracker_dir {#ifdef CONFIG_REF_TRACKER spinlock_t lock; unsigned int quarantine_avail; refcount_t untracked; refcount_t no_tracker; bool dead; struct list_head list; /* List of active trackers */ struct list_head quarantine; /* List of dead trackers */ const char *class; /* object classname */#endif};
#ifdef CONFIG_REF_TRACKER
#ifdef CONFIG_DEBUG_FS
void ref_tracker_dir_debugfs(struct ref_tracker_dir *dir);void ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...);
#else /* CONFIG_DEBUG_FS */
static inline void ref_tracker_dir_debugfs(struct ref_tracker_dir *dir){}
static inline __ostream_printfvoid ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...){}
#endif /* CONFIG_DEBUG_FS */
/** * ref_tracker_dir_init - initialize a ref_tracker dir * @dir: ref_tracker_dir to be initialized * @quarantine_count: max number of entries to be tracked * @class: pointer to static string that describes object type * * Initialize a ref_tracker_dir. If debugfs is configured, then a file * will also be created for it under the top-level ref_tracker debugfs * directory. * * Note that @class must point to a static string. */static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, unsigned int quarantine_count, const char *class){ INIT_LIST_HEAD(&dir->list); INIT_LIST_HEAD(&dir->quarantine); spin_lock_init(&dir->lock); dir->quarantine_avail = quarantine_count; dir->dead = false; refcount_set(&dir->untracked, 1); refcount_set(&dir->no_tracker, 1); dir->class = class; ref_tracker_dir_debugfs(dir); stack_depot_init();}
void ref_tracker_dir_exit(struct ref_tracker_dir *dir);
void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir, unsigned int display_limit);
void ref_tracker_dir_print(struct ref_tracker_dir *dir, unsigned int display_limit);
int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size);
int ref_tracker_alloc(struct ref_tracker_dir *dir, struct ref_tracker **trackerp, gfp_t gfp);
int ref_tracker_free(struct ref_tracker_dir *dir, struct ref_tracker **trackerp);
#else /* CONFIG_REF_TRACKER */
static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir, unsigned int quarantine_count, const char *class){}
static inline void ref_tracker_dir_debugfs(struct ref_tracker_dir *dir){}
static inline __ostream_printfvoid ref_tracker_dir_symlink(struct ref_tracker_dir *dir, const char *fmt, ...){}
static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir){}
static inline void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir, unsigned int display_limit){}
static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir, unsigned int display_limit){}
static inline int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size){ return 0;}
static inline int ref_tracker_alloc(struct ref_tracker_dir *dir, struct ref_tracker **trackerp, gfp_t gfp){ return 0;}
static inline int ref_tracker_free(struct ref_tracker_dir *dir, struct ref_tracker **trackerp){ return 0;}
#endif
#endif /* _LINUX_REF_TRACKER_H */