git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/run-04-basichash.c

   1 #include <ccan/tdb2/tdb.c>
   2 #include <ccan/tdb2/free.c>
   3 #include <ccan/tdb2/lock.c>
   4 #include <ccan/tdb2/io.c>
   5 #include <ccan/tdb2/hash.c>
   6 #include <ccan/tdb2/transaction.c>
   7 #include <ccan/tdb2/check.c>
   8 #include <ccan/tap/tap.h>
   9 #include "logging.h"
  10
  11 /* We rig the hash so adjacent-numbered records always clash. */
  12 static uint64_t clash(const void *key, size_t len, uint64_t seed, void *priv)
  13 {
  14         return ((uint64_t)*(unsigned int *)key)
  15                 << (64 - TDB_TOPLEVEL_HASH_BITS - 1);
  16 }
  17
  18 int main(int argc, char *argv[])
  19 {
  20         unsigned int i, j;
  21         struct tdb_context *tdb;
  22         unsigned int v;
  23         struct tdb_used_record rec;
  24         struct tdb_data key = { (unsigned char *)&v, sizeof(v) };
  25         struct tdb_data dbuf = { (unsigned char *)&v, sizeof(v) };
  26         union tdb_attribute hattr = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
  27                                                 .hash_fn = clash } };
  28         int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
  29                         TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT,
  30                         TDB_NOMMAP|TDB_CONVERT,
  31         };
  32
  33         hattr.base.next = &tap_log_attr;
  34
  35         plan_tests(sizeof(flags) / sizeof(flags[0])
  36                    * (91 + (2 * ((1 << TDB_HASH_GROUP_BITS) - 1))) + 1);
  37         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  38                 struct hash_info h;
  39                 tdb_off_t new_off, off, subhash;
  40
  41                 tdb = tdb_open("run-04-basichash.tdb", flags[i],
  42                                O_RDWR|O_CREAT|O_TRUNC, 0600, &hattr);
  43                 ok1(tdb);
  44                 if (!tdb)
  45                         continue;
  46
  47                 v = 0;
  48                 /* Should not find it. */
  49                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
  50                 /* Should have created correct hash. */
  51                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
  52                 /* Should have located space in group 0, bucket 0. */
  53                 ok1(h.group_start == offsetof(struct tdb_header, hashtable));
  54                 ok1(h.home_bucket == 0);
  55                 ok1(h.found_bucket == 0);
  56                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
  57
  58                 /* Should have lock on bucket 0 */
  59                 ok1(h.hlock_start == 0);
  60                 ok1(h.hlock_range ==
  61                     1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
  62                 ok1((tdb->flags & TDB_NOLOCK) || tdb->num_lockrecs == 1);
  63                 ok1((tdb->flags & TDB_NOLOCK)
  64                     || tdb->lockrecs[0].off == TDB_HASH_LOCK_START);
  65                 /* FIXME: Check lock length */
  66
  67                 /* Allocate a new record. */
  68                 new_off = alloc(tdb, key.dsize, dbuf.dsize, h.h, false);
  69                 ok1(new_off != TDB_OFF_ERR);
  70
  71                 /* We should be able to add it now. */
  72                 ok1(add_to_hash(tdb, &h, new_off) == 0);
  73
  74                 /* Make sure we fill it in for later finding. */
  75                 off = new_off + sizeof(struct tdb_used_record);
  76                 ok1(!tdb->methods->write(tdb, off, key.dptr, key.dsize));
  77                 off += key.dsize;
  78                 ok1(!tdb->methods->write(tdb, off, dbuf.dptr, dbuf.dsize));
  79
  80                 /* We should be able to unlock that OK. */
  81                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
  82                                       F_WRLCK) == 0);
  83
  84                 /* Database should be consistent. */
  85                 ok1(tdb_check(tdb, NULL, NULL) == 0);
  86
  87                 /* Now, this should give a successful lookup. */
  88                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL)
  89                     == new_off);
  90                 /* Should have created correct hash. */
  91                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
  92                 /* Should have located space in group 0, bucket 0. */
  93                 ok1(h.group_start == offsetof(struct tdb_header, hashtable));
  94                 ok1(h.home_bucket == 0);
  95                 ok1(h.found_bucket == 0);
  96                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
  97
  98                 /* Should have lock on bucket 0 */
  99                 ok1(h.hlock_start == 0);
 100                 ok1(h.hlock_range ==
 101                     1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
 102                 ok1((tdb->flags & TDB_NOLOCK) || tdb->num_lockrecs == 1);
 103                 ok1((tdb->flags & TDB_NOLOCK)
 104                     || tdb->lockrecs[0].off == TDB_HASH_LOCK_START);
 105                 /* FIXME: Check lock length */
 106
 107                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
 108                                       F_WRLCK) == 0);
 109
 110                 /* Database should be consistent. */
 111                 ok1(tdb_check(tdb, NULL, NULL) == 0);
 112
 113                 /* Test expansion. */
 114                 v = 1;
 115                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
 116                 /* Should have created correct hash. */
 117                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
 118                 /* Should have located space in group 0, bucket 1. */
 119                 ok1(h.group_start == offsetof(struct tdb_header, hashtable));
 120                 ok1(h.home_bucket == 0);
 121                 ok1(h.found_bucket == 1);
 122                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS);
 123
 124                 /* Should have lock on bucket 0 */
 125                 ok1(h.hlock_start == 0);
 126                 ok1(h.hlock_range ==
 127                     1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
 128                 ok1((tdb->flags & TDB_NOLOCK) || tdb->num_lockrecs == 1);
 129                 ok1((tdb->flags & TDB_NOLOCK)
 130                     || tdb->lockrecs[0].off == TDB_HASH_LOCK_START);
 131                 /* FIXME: Check lock length */
 132
 133                 /* Make it expand 0'th bucket. */
 134                 ok1(expand_group(tdb, &h) == 0);
 135                 /* First one should be subhash, next should be empty. */
 136                 ok1(is_subhash(h.group[0]));
 137                 subhash = (h.group[0] & TDB_OFF_MASK);
 138                 for (j = 1; j < (1 << TDB_HASH_GROUP_BITS); j++)
 139                         ok1(h.group[j] == 0);
 140
 141                 ok1(tdb_write_convert(tdb, h.group_start,
 142                                       h.group, sizeof(h.group)) == 0);
 143                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
 144                                       F_WRLCK) == 0);
 145
 146                 /* Should be happy with expansion. */
 147                 ok1(tdb_check(tdb, NULL, NULL) == 0);
 148
 149                 /* Should be able to find it. */
 150                 v = 0;
 151                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL)
 152                     == new_off);
 153                 /* Should have created correct hash. */
 154                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
 155                 /* Should have located space in expanded group 0, bucket 0. */
 156                 ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
 157                 ok1(h.home_bucket == 0);
 158                 ok1(h.found_bucket == 0);
 159                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
 160                     + TDB_SUBLEVEL_HASH_BITS);
 161
 162                 /* Should have lock on bucket 0 */
 163                 ok1(h.hlock_start == 0);
 164                 ok1(h.hlock_range ==
 165                     1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
 166                 ok1((tdb->flags & TDB_NOLOCK) || tdb->num_lockrecs == 1);
 167                 ok1((tdb->flags & TDB_NOLOCK)
 168                     || tdb->lockrecs[0].off == TDB_HASH_LOCK_START);
 169                 /* FIXME: Check lock length */
 170
 171                 /* Simple delete should work. */
 172                 ok1(delete_from_hash(tdb, &h) == 0);
 173                 ok1(add_free_record(tdb, new_off,
 174                                     sizeof(struct tdb_used_record)
 175                                     + rec_key_length(&rec)
 176                                     + rec_data_length(&rec)
 177                                     + rec_extra_padding(&rec)) == 0);
 178                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
 179                                       F_WRLCK) == 0);
 180                 ok1(tdb_check(tdb, NULL, NULL) == 0);
 181
 182                 /* Test second-level expansion: should expand 0th bucket. */
 183                 v = 0;
 184                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
 185                 /* Should have created correct hash. */
 186                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
 187                 /* Should have located space in group 0, bucket 0. */
 188                 ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
 189                 ok1(h.home_bucket == 0);
 190                 ok1(h.found_bucket == 0);
 191                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS+TDB_SUBLEVEL_HASH_BITS);
 192
 193                 /* Should have lock on bucket 0 */
 194                 ok1(h.hlock_start == 0);
 195                 ok1(h.hlock_range ==
 196                     1ULL << (64-(TDB_TOPLEVEL_HASH_BITS-TDB_HASH_GROUP_BITS)));
 197                 ok1((tdb->flags & TDB_NOLOCK) || tdb->num_lockrecs == 1);
 198                 ok1((tdb->flags & TDB_NOLOCK)
 199                     || tdb->lockrecs[0].off == TDB_HASH_LOCK_START);
 200                 /* FIXME: Check lock length */
 201
 202                 ok1(expand_group(tdb, &h) == 0);
 203                 /* First one should be subhash, next should be empty. */
 204                 ok1(is_subhash(h.group[0]));
 205                 subhash = (h.group[0] & TDB_OFF_MASK);
 206                 for (j = 1; j < (1 << TDB_HASH_GROUP_BITS); j++)
 207                         ok1(h.group[j] == 0);
 208                 ok1(tdb_write_convert(tdb, h.group_start,
 209                                       h.group, sizeof(h.group)) == 0);
 210                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
 211                                       F_WRLCK) == 0);
 212
 213                 /* Should be happy with expansion. */
 214                 ok1(tdb_check(tdb, NULL, NULL) == 0);
 215
 216                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL) == 0);
 217                 /* Should have created correct hash. */
 218                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
 219                 /* Should have located space in group 0, bucket 0. */
 220                 ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
 221                 ok1(h.home_bucket == 0);
 222                 ok1(h.found_bucket == 0);
 223                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
 224                     + TDB_SUBLEVEL_HASH_BITS * 2);
 225
 226                 /* We should be able to add it now. */
 227                 /* Allocate a new record. */
 228                 new_off = alloc(tdb, key.dsize, dbuf.dsize, h.h, false);
 229                 ok1(new_off != TDB_OFF_ERR);
 230                 ok1(add_to_hash(tdb, &h, new_off) == 0);
 231
 232                 /* Make sure we fill it in for later finding. */
 233                 off = new_off + sizeof(struct tdb_used_record);
 234                 ok1(!tdb->methods->write(tdb, off, key.dptr, key.dsize));
 235                 off += key.dsize;
 236                 ok1(!tdb->methods->write(tdb, off, dbuf.dptr, dbuf.dsize));
 237
 238                 /* We should be able to unlock that OK. */
 239                 ok1(tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range,
 240                                       F_WRLCK) == 0);
 241
 242                 /* Database should be consistent. */
 243                 ok1(tdb_check(tdb, NULL, NULL) == 0);
 244
 245                 /* Should be able to find it. */
 246                 v = 0;
 247                 ok1(find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL)
 248                     == new_off);
 249                 /* Should have created correct hash. */
 250                 ok1(h.h == tdb_hash(tdb, key.dptr, key.dsize));
 251                 /* Should have located space in expanded group 0, bucket 0. */
 252                 ok1(h.group_start == subhash + sizeof(struct tdb_used_record));
 253                 ok1(h.home_bucket == 0);
 254                 ok1(h.found_bucket == 0);
 255                 ok1(h.hash_used == TDB_TOPLEVEL_HASH_BITS
 256                     + TDB_SUBLEVEL_HASH_BITS * 2);
 257
 258                 tdb_close(tdb);
 259         }
 260
 261         ok1(tap_log_messages == 0);
 262         return exit_status();
 263 }