65cead03584dbf47c16cb89ba6d279fff1250339
[kai/samba-autobuild/.git] / lib / tdb2 / test / run-20-growhash.c
1 #include "tdb2-source.h"
2 #include <ccan/tap/tap.h>
3 #include "logging.h"
4
5 static uint64_t myhash(const void *key, size_t len, uint64_t seed, void *priv)
6 {
7         return *(const uint64_t *)key;
8 }
9
10 static void add_bits(uint64_t *val, unsigned new, unsigned new_bits,
11                      unsigned *done)
12 {
13         *done += new_bits;
14         *val |= ((uint64_t)new << (64 - *done));
15 }
16
17 static uint64_t make_key(unsigned topgroup, unsigned topbucket,
18                          unsigned subgroup1, unsigned subbucket1,
19                          unsigned subgroup2, unsigned subbucket2)
20 {
21         uint64_t key = 0;
22         unsigned done = 0;
23
24         add_bits(&key, topgroup, TDB_TOPLEVEL_HASH_BITS - TDB_HASH_GROUP_BITS,
25                  &done);
26         add_bits(&key, topbucket, TDB_HASH_GROUP_BITS, &done);
27         add_bits(&key, subgroup1, TDB_SUBLEVEL_HASH_BITS - TDB_HASH_GROUP_BITS,
28                  &done);
29         add_bits(&key, subbucket1, TDB_HASH_GROUP_BITS, &done);
30         add_bits(&key, subgroup2, TDB_SUBLEVEL_HASH_BITS - TDB_HASH_GROUP_BITS,
31                  &done);
32         add_bits(&key, subbucket2, TDB_HASH_GROUP_BITS, &done);
33         return key;
34 }
35
36 int main(int argc, char *argv[])
37 {
38         unsigned int i, j;
39         struct tdb_context *tdb;
40         uint64_t kdata;
41         struct tdb_used_record rec;
42         struct tdb_data key = { (unsigned char *)&kdata, sizeof(kdata) };
43         struct tdb_data dbuf = { (unsigned char *)&kdata, sizeof(kdata) };
44         union tdb_attribute hattr = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
45                                                 .fn = myhash } };
46         int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
47                         TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT,
48                         TDB_NOMMAP|TDB_CONVERT,
49         };
50
51         hattr.base.next = &tap_log_attr;
52
53         plan_tests(sizeof(flags) / sizeof(flags[0])
54                    * (9 + (20 + 2 * ((1 << TDB_HASH_GROUP_BITS) - 2))
55                       * (1 << TDB_HASH_GROUP_BITS)) + 1);
56         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
57                 struct hash_info h;
58
59                 tdb = tdb_open("run-20-growhash.tdb", flags[i],
60                                O_RDWR|O_CREAT|O_TRUNC, 0600, &hattr);
61                 ok1(tdb);
62                 if (!tdb)
63                         continue;
64
65                 /* Fill a group. */
66                 for (j = 0; j < (1 << TDB_HASH_GROUP_BITS); j++) {
67                         kdata = make_key(0, j, 0, 0, 0, 0);
68                         ok1(tdb_store(tdb, key, dbuf, TDB_INSERT) == 0);
69                 }
70                 ok1(tdb_check(tdb, NULL, NULL) == 0);
71
72                 /* Check first still exists. */
73                 kdata = make_key(0, 0, 0, 0, 0, 0);
74                 ok1(find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL) != 0);
75                 /* Should have created correct hash. */
76                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
77                 /* Should have located space in group 0, bucket 0. */
78                 ok1(h.group_start == offsetof(struct tdb_header, hashtable));
79                 ok1(h.home_bucket == 0);
80                 ok1(h.found_bucket == 0);
81                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
82                 /* Entire group should be full! */
83                 for (j = 0; j < (1 << TDB_HASH_GROUP_BITS); j++)
84                         ok1(h.group[j] != 0);
85
86                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
87                                       F_RDLCK) == 0);
88
89                 /* Now, add one more to each should expand (that) bucket. */
90                 for (j = 0; j < (1 << TDB_HASH_GROUP_BITS); j++) {
91                         unsigned int k;
92                         kdata = make_key(0, j, 0, 1, 0, 0);
93                         ok1(tdb_store(tdb, key, dbuf, TDB_INSERT) == 0);
94                         ok1(tdb_check(tdb, NULL, NULL) == 0);
95
96                         ok1(find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL));
97                         /* Should have created correct hash. */
98                         ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
99                         /* Should have moved to subhash */
100                         ok1(h.group_start >= sizeof(struct tdb_header));
101                         ok1(h.home_bucket == 1);
102                         ok1(h.found_bucket == 1);
103                         ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
104                             + TDB_SUBLEVEL_HASH_BITS);
105                         ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
106                                               F_RDLCK) == 0);
107
108                         /* Keep adding, make it expand again. */
109                         for (k = 2; k < (1 << TDB_HASH_GROUP_BITS); k++) {
110                                 kdata = make_key(0, j, 0, k, 0, 0);
111                                 ok1(tdb_store(tdb, key, dbuf, TDB_INSERT) == 0);
112                                 ok1(tdb_check(tdb, NULL, NULL) == 0);
113                         }
114
115                         /* This should tip it over to sub-sub-hash. */
116                         kdata = make_key(0, j, 0, 0, 0, 1);
117                         ok1(tdb_store(tdb, key, dbuf, TDB_INSERT) == 0);
118                         ok1(tdb_check(tdb, NULL, NULL) == 0);
119
120                         ok1(find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL));
121                         /* Should have created correct hash. */
122                         ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
123                         /* Should have moved to subhash */
124                         ok1(h.group_start >= sizeof(struct tdb_header));
125                         ok1(h.home_bucket == 1);
126                         ok1(h.found_bucket == 1);
127                         ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
128                             + TDB_SUBLEVEL_HASH_BITS + TDB_SUBLEVEL_HASH_BITS);
129                         ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
130                                               F_RDLCK) == 0);
131                 }
132                 tdb_close(tdb);
133         }
134
135         ok1(tap_log_messages == 0);
136         return exit_status();
137 }