8 #define HASH_BUCKETS 512
9 #define HASH_MASK (HASH_BUCKETS - 1)
11 unsigned int file_hash_size = HASH_BUCKETS * sizeof(struct flist_head);
13 static struct flist_head *file_hash;
14 static struct fio_mutex *hash_lock;
16 static unsigned short hash(const char *name)
18 return jhash(name, strlen(name), 0) & HASH_MASK;
21 void fio_file_hash_lock(void)
23 fio_mutex_down(hash_lock);
26 void fio_file_hash_unlock(void)
28 fio_mutex_up(hash_lock);
31 void remove_file_hash(struct fio_file *f)
33 fio_mutex_down(hash_lock);
35 if (fio_file_hashed(f)) {
36 assert(!flist_empty(&f->hash_list));
37 flist_del_init(&f->hash_list);
38 fio_file_clear_hashed(f);
41 fio_mutex_up(hash_lock);
44 static struct fio_file *__lookup_file_hash(const char *name)
46 struct flist_head *bucket = &file_hash[hash(name)];
49 flist_for_each(n, bucket) {
50 struct fio_file *f = flist_entry(n, struct fio_file, hash_list);
55 if (!strcmp(f->file_name, name)) {
64 struct fio_file *lookup_file_hash(const char *name)
68 fio_mutex_down(hash_lock);
69 f = __lookup_file_hash(name);
70 fio_mutex_up(hash_lock);
74 struct fio_file *add_file_hash(struct fio_file *f)
76 struct fio_file *alias;
78 if (fio_file_hashed(f))
81 INIT_FLIST_HEAD(&f->hash_list);
83 fio_mutex_down(hash_lock);
85 alias = __lookup_file_hash(f->file_name);
87 fio_file_set_hashed(f);
88 flist_add_tail(&f->hash_list, &file_hash[hash(f->file_name)]);
91 fio_mutex_up(hash_lock);
95 void file_hash_exit(void)
97 unsigned int i, has_entries = 0;
99 fio_mutex_down(hash_lock);
100 for (i = 0; i < HASH_BUCKETS; i++)
101 has_entries += !flist_empty(&file_hash[i]);
102 fio_mutex_up(hash_lock);
105 log_err("fio: file hash not empty on exit\n");
108 fio_mutex_remove(hash_lock);
112 void file_hash_init(void *ptr)
117 for (i = 0; i < HASH_BUCKETS; i++)
118 INIT_FLIST_HEAD(&file_hash[i]);
120 hash_lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);