git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/api-13-delete.c

   1 #include <ccan/tdb2/private.h> // For TDB_TOPLEVEL_HASH_BITS
   2 #include <ccan/hash/hash.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <ccan/tdb2/tdb2.h>
   7 #include <ccan/tap/tap.h>
   8 #include "logging.h"
   9
  10 /* We rig the hash so adjacent-numbered records always clash. */
  11 static uint64_t clash(const void *key, size_t len, uint64_t seed, void *priv)
  12 {
  13         return ((uint64_t)*(const unsigned int *)key)
  14                 << (64 - TDB_TOPLEVEL_HASH_BITS - 1);
  15 }
  16
  17 /* We use the same seed which we saw a failure on. */
  18 static uint64_t fixedhash(const void *key, size_t len, uint64_t seed, void *p)
  19 {
  20         return hash64_stable((const unsigned char *)key, len,
  21                              *(uint64_t *)p);
  22 }
  23
  24 static bool store_records(struct tdb_context *tdb)
  25 {
  26         int i;
  27         struct tdb_data key = { (unsigned char *)&i, sizeof(i) };
  28         struct tdb_data d, data = { (unsigned char *)&i, sizeof(i) };
  29
  30         for (i = 0; i < 1000; i++) {
  31                 if (tdb_store(tdb, key, data, TDB_REPLACE) != 0)
  32                         return false;
  33                 tdb_fetch(tdb, key, &d);
  34                 if (!tdb_deq(d, data))
  35                         return false;
  36                 free(d.dptr);
  37         }
  38         return true;
  39 }
  40
  41 static void test_val(struct tdb_context *tdb, uint64_t val)
  42 {
  43         uint64_t v;
  44         struct tdb_data key = { (unsigned char *)&v, sizeof(v) };
  45         struct tdb_data d, data = { (unsigned char *)&v, sizeof(v) };
  46
  47         /* Insert an entry, then delete it. */
  48         v = val;
  49         /* Delete should fail. */
  50         ok1(tdb_delete(tdb, key) == TDB_ERR_NOEXIST);
  51         ok1(tdb_check(tdb, NULL, NULL) == 0);
  52
  53         /* Insert should succeed. */
  54         ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
  55         ok1(tdb_check(tdb, NULL, NULL) == 0);
  56
  57         /* Delete should succeed. */
  58         ok1(tdb_delete(tdb, key) == 0);
  59         ok1(tdb_check(tdb, NULL, NULL) == 0);
  60
  61         /* Re-add it, then add collision. */
  62         ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
  63         v = val + 1;
  64         ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
  65         ok1(tdb_check(tdb, NULL, NULL) == 0);
  66
  67         /* Can find both? */
  68         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
  69         ok1(d.dsize == data.dsize);
  70         free(d.dptr);
  71         v = val;
  72         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
  73         ok1(d.dsize == data.dsize);
  74         free(d.dptr);
  75
  76         /* Delete second one. */
  77         v = val + 1;
  78         ok1(tdb_delete(tdb, key) == 0);
  79         ok1(tdb_check(tdb, NULL, NULL) == 0);
  80
  81         /* Re-add */
  82         ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
  83         ok1(tdb_check(tdb, NULL, NULL) == 0);
  84
  85         /* Now, try deleting first one. */
  86         v = val;
  87         ok1(tdb_delete(tdb, key) == 0);
  88         ok1(tdb_check(tdb, NULL, NULL) == 0);
  89
  90         /* Can still find second? */
  91         v = val + 1;
  92         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
  93         ok1(d.dsize == data.dsize);
  94         free(d.dptr);
  95
  96         /* Now, this will be ideally placed. */
  97         v = val + 2;
  98         ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
  99         ok1(tdb_check(tdb, NULL, NULL) == 0);
 100
 101         /* This will collide with both. */
 102         v = val;
 103         ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
 104
 105         /* We can still find them all, right? */
 106         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
 107         ok1(d.dsize == data.dsize);
 108         free(d.dptr);
 109         v = val + 1;
 110         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
 111         ok1(d.dsize == data.dsize);
 112         free(d.dptr);
 113         v = val + 2;
 114         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
 115         ok1(d.dsize == data.dsize);
 116         free(d.dptr);
 117
 118         /* And if we delete val + 1, that val + 2 should not move! */
 119         v = val + 1;
 120         ok1(tdb_delete(tdb, key) == 0);
 121         ok1(tdb_check(tdb, NULL, NULL) == 0);
 122
 123         v = val;
 124         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
 125         ok1(d.dsize == data.dsize);
 126         free(d.dptr);
 127         v = val + 2;
 128         ok1(tdb_fetch(tdb, key, &d) == TDB_SUCCESS);
 129         ok1(d.dsize == data.dsize);
 130         free(d.dptr);
 131
 132         /* Delete those two, so we are empty. */
 133         ok1(tdb_delete(tdb, key) == 0);
 134         v = val;
 135         ok1(tdb_delete(tdb, key) == 0);
 136
 137         ok1(tdb_check(tdb, NULL, NULL) == 0);
 138 }
 139
 140 int main(int argc, char *argv[])
 141 {
 142         unsigned int i, j;
 143         struct tdb_context *tdb;
 144         uint64_t seed = 16014841315512641303ULL;
 145         union tdb_attribute clash_hattr
 146                 = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
 147                               .fn = clash } };
 148         union tdb_attribute fixed_hattr
 149                 = { .hash = { .base = { TDB_ATTRIBUTE_HASH },
 150                               .fn = fixedhash,
 151                               .data = &seed } };
 152         int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
 153                         TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT,
 154                         TDB_NOMMAP|TDB_CONVERT,
 155                         TDB_INTERNAL|TDB_VERSION1, TDB_VERSION1,
 156                         TDB_NOMMAP|TDB_VERSION1,
 157                         TDB_INTERNAL|TDB_CONVERT|TDB_VERSION1,
 158                         TDB_CONVERT|TDB_VERSION1,
 159                         TDB_NOMMAP|TDB_CONVERT|TDB_VERSION1 };
 160         /* These two values gave trouble before. */
 161         int vals[] = { 755, 837 };
 162
 163         clash_hattr.base.next = &tap_log_attr;
 164         fixed_hattr.base.next = &tap_log_attr;
 165
 166         plan_tests(sizeof(flags) / sizeof(flags[0])
 167                    * (39 * 3 + 5 + sizeof(vals)/sizeof(vals[0])*2) + 1);
 168         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
 169                 tdb = tdb_open("run-13-delete.tdb", flags[i],
 170                                O_RDWR|O_CREAT|O_TRUNC, 0600, &clash_hattr);
 171                 ok1(tdb);
 172                 if (!tdb)
 173                         continue;
 174
 175                 /* Check start of hash table. */
 176                 test_val(tdb, 0);
 177
 178                 /* Check end of hash table. */
 179                 test_val(tdb, -1ULL);
 180
 181                 /* Check mixed bitpattern. */
 182                 test_val(tdb, 0x123456789ABCDEF0ULL);
 183
 184                 ok1(!tdb->file || (tdb->file->allrecord_lock.count == 0
 185                                    && tdb->file->num_lockrecs == 0));
 186                 tdb_close(tdb);
 187
 188                 /* Deleting these entries in the db gave problems. */
 189                 tdb = tdb_open("run-13-delete.tdb", flags[i],
 190                                O_RDWR|O_CREAT|O_TRUNC, 0600, &fixed_hattr);
 191                 ok1(tdb);
 192                 if (!tdb)
 193                         continue;
 194
 195                 ok1(store_records(tdb));
 196                 ok1(tdb_check(tdb, NULL, NULL) == 0);
 197                 for (j = 0; j < sizeof(vals)/sizeof(vals[0]); j++) {
 198                         struct tdb_data key;
 199
 200                         key.dptr = (unsigned char *)&vals[j];
 201                         key.dsize = sizeof(vals[j]);
 202                         ok1(tdb_delete(tdb, key) == 0);
 203                         ok1(tdb_check(tdb, NULL, NULL) == 0);
 204                 }
 205                 tdb_close(tdb);
 206         }
 207
 208         ok1(tap_log_messages == 0);
 209         return exit_status();
 210 }