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