Commit | Line | Data |
---|---|---|
380065aa JA |
1 | #include <stdlib.h> |
2 | #include <assert.h> | |
3 | ||
4 | #include "fio.h" | |
01743ee1 | 5 | #include "flist.h" |
dadf66c5 | 6 | #include "hash.h" |
10aa136b | 7 | #include "filehash.h" |
380065aa JA |
8 | |
9 | #define HASH_BUCKETS 512 | |
10 | #define HASH_MASK (HASH_BUCKETS - 1) | |
11 | ||
01743ee1 | 12 | unsigned int file_hash_size = HASH_BUCKETS * sizeof(struct flist_head); |
380065aa | 13 | |
01743ee1 | 14 | static struct flist_head *file_hash; |
b950781e | 15 | static struct fio_mutex *hash_lock; |
380065aa | 16 | |
380065aa JA |
17 | static unsigned short hash(const char *name) |
18 | { | |
dadf66c5 | 19 | return jhash(name, strlen(name), 0) & HASH_MASK; |
380065aa JA |
20 | } |
21 | ||
90426237 JA |
22 | void fio_file_hash_lock(void) |
23 | { | |
45aeca74 JA |
24 | if (hash_lock) |
25 | fio_mutex_down(hash_lock); | |
90426237 JA |
26 | } |
27 | ||
28 | void fio_file_hash_unlock(void) | |
29 | { | |
45aeca74 JA |
30 | if (hash_lock) |
31 | fio_mutex_up(hash_lock); | |
90426237 JA |
32 | } |
33 | ||
380065aa JA |
34 | void remove_file_hash(struct fio_file *f) |
35 | { | |
b950781e | 36 | fio_mutex_down(hash_lock); |
380065aa | 37 | |
d6aed795 | 38 | if (fio_file_hashed(f)) { |
01743ee1 JA |
39 | assert(!flist_empty(&f->hash_list)); |
40 | flist_del_init(&f->hash_list); | |
d6aed795 | 41 | fio_file_clear_hashed(f); |
380065aa JA |
42 | } |
43 | ||
b950781e | 44 | fio_mutex_up(hash_lock); |
380065aa JA |
45 | } |
46 | ||
47 | static struct fio_file *__lookup_file_hash(const char *name) | |
48 | { | |
01743ee1 JA |
49 | struct flist_head *bucket = &file_hash[hash(name)]; |
50 | struct flist_head *n; | |
380065aa | 51 | |
01743ee1 JA |
52 | flist_for_each(n, bucket) { |
53 | struct fio_file *f = flist_entry(n, struct fio_file, hash_list); | |
380065aa | 54 | |
89541106 JA |
55 | if (!f->file_name) |
56 | continue; | |
57 | ||
380065aa JA |
58 | if (!strcmp(f->file_name, name)) { |
59 | assert(f->fd != -1); | |
60 | return f; | |
61 | } | |
62 | } | |
63 | ||
380065aa JA |
64 | return NULL; |
65 | } | |
66 | ||
67 | struct fio_file *lookup_file_hash(const char *name) | |
68 | { | |
69 | struct fio_file *f; | |
70 | ||
b950781e | 71 | fio_mutex_down(hash_lock); |
380065aa | 72 | f = __lookup_file_hash(name); |
b950781e | 73 | fio_mutex_up(hash_lock); |
380065aa JA |
74 | return f; |
75 | } | |
76 | ||
77 | struct fio_file *add_file_hash(struct fio_file *f) | |
78 | { | |
79 | struct fio_file *alias; | |
80 | ||
d6aed795 | 81 | if (fio_file_hashed(f)) |
380065aa JA |
82 | return NULL; |
83 | ||
01743ee1 | 84 | INIT_FLIST_HEAD(&f->hash_list); |
380065aa | 85 | |
b950781e | 86 | fio_mutex_down(hash_lock); |
380065aa JA |
87 | |
88 | alias = __lookup_file_hash(f->file_name); | |
89 | if (!alias) { | |
d6aed795 | 90 | fio_file_set_hashed(f); |
01743ee1 | 91 | flist_add_tail(&f->hash_list, &file_hash[hash(f->file_name)]); |
380065aa JA |
92 | } |
93 | ||
b950781e | 94 | fio_mutex_up(hash_lock); |
380065aa JA |
95 | return alias; |
96 | } | |
97 | ||
5e1d306e JA |
98 | void file_hash_exit(void) |
99 | { | |
100 | unsigned int i, has_entries = 0; | |
101 | ||
b950781e | 102 | fio_mutex_down(hash_lock); |
5e1d306e | 103 | for (i = 0; i < HASH_BUCKETS; i++) |
01743ee1 | 104 | has_entries += !flist_empty(&file_hash[i]); |
b950781e | 105 | fio_mutex_up(hash_lock); |
5e1d306e JA |
106 | |
107 | if (has_entries) | |
108 | log_err("fio: file hash not empty on exit\n"); | |
109 | ||
b950781e JA |
110 | file_hash = NULL; |
111 | fio_mutex_remove(hash_lock); | |
5e1d306e JA |
112 | hash_lock = NULL; |
113 | } | |
114 | ||
380065aa JA |
115 | void file_hash_init(void *ptr) |
116 | { | |
117 | unsigned int i; | |
118 | ||
119 | file_hash = ptr; | |
120 | for (i = 0; i < HASH_BUCKETS; i++) | |
01743ee1 | 121 | INIT_FLIST_HEAD(&file_hash[i]); |
380065aa | 122 | |
521da527 | 123 | hash_lock = fio_mutex_init(FIO_MUTEX_UNLOCKED); |
380065aa | 124 | } |