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13.127.59.50
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Linux ip-172-31-46-210 5.15.0-1033-aws #37~20.04.1-Ubuntu SMP Fri Mar 17 11:39:30 UTC 2023 x86_64
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Apache/2.4.41 (Ubuntu)
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View File Name :
mbcache.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_MBCACHE_H #define _LINUX_MBCACHE_H #include <linux/hash.h> #include <linux/list_bl.h> #include <linux/list.h> #include <linux/atomic.h> #include <linux/fs.h> struct mb_cache; struct mb_cache_entry { /* List of entries in cache - protected by cache->c_list_lock */ struct list_head e_list; /* Hash table list - protected by hash chain bitlock */ struct hlist_bl_node e_hash_list; atomic_t e_refcnt; /* Key in hash - stable during lifetime of the entry */ u32 e_key; u32 e_referenced:1; u32 e_reusable:1; /* User provided value - stable during lifetime of the entry */ u64 e_value; }; struct mb_cache *mb_cache_create(int bucket_bits); void mb_cache_destroy(struct mb_cache *cache); int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key, u64 value, bool reusable); void __mb_cache_entry_free(struct mb_cache_entry *entry); static inline int mb_cache_entry_put(struct mb_cache *cache, struct mb_cache_entry *entry) { if (!atomic_dec_and_test(&entry->e_refcnt)) return 0; __mb_cache_entry_free(entry); return 1; } void mb_cache_entry_delete(struct mb_cache *cache, u32 key, u64 value); struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *cache, u32 key, u64 value); struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, u32 key); struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache, struct mb_cache_entry *entry); void mb_cache_entry_touch(struct mb_cache *cache, struct mb_cache_entry *entry); #endif /* _LINUX_MBCACHE_H */