git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/run-03-coalesce.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/check.c>
   7 #include <ccan/tap/tap.h>
   8 #include "logging.h"
   9 #include "layout.h"
  10
  11 static tdb_len_t free_record_length(struct tdb_context *tdb, tdb_off_t off)
  12 {
  13         struct tdb_free_record f;
  14
  15         if (tdb_read_convert(tdb, off, &f, sizeof(f)) != 0)
  16                 return TDB_OFF_ERR;
  17         if (frec_magic(&f) != TDB_FREE_MAGIC)
  18                 return TDB_OFF_ERR;
  19         return f.data_len;
  20 }
  21
  22 int main(int argc, char *argv[])
  23 {
  24         tdb_off_t b_off, zone_off;
  25         struct tdb_context *tdb;
  26         struct tdb_layout *layout;
  27         struct tdb_data data, key;
  28         tdb_len_t len;
  29         unsigned int zone_bits = 16;
  30
  31         /* FIXME: Test TDB_CONVERT */
  32
  33         plan_tests(45);
  34         data.dptr = (void *)"world";
  35         data.dsize = 5;
  36         key.dptr = (void *)"hello";
  37         key.dsize = 5;
  38
  39         /* No coalescing can be done due to EOF */
  40         layout = new_tdb_layout();
  41         tdb_layout_add_zone(layout, zone_bits, false);
  42         tdb = tdb_layout_get(layout);
  43         len = layout->elem[1].free.len;
  44         zone_off = layout->elem[0].base.off;
  45         ok1(tdb_check(tdb, NULL, NULL) == 0);
  46         ok1(free_record_length(tdb, layout->elem[1].base.off) == len);
  47
  48         /* Figure out which bucket free entry is. */
  49         b_off = bucket_off(zone_off, size_to_bucket(zone_bits, len));
  50         /* Lock and fail to coalesce. */
  51         ok1(tdb_lock_free_bucket(tdb, b_off, TDB_LOCK_WAIT) == 0);
  52         ok1(coalesce(tdb, zone_off, zone_bits, layout->elem[1].base.off,
  53                      b_off, len) == 0);
  54         tdb_unlock_free_bucket(tdb, b_off);
  55         ok1(free_record_length(tdb, layout->elem[1].base.off) == len);
  56         ok1(tdb_check(tdb, NULL, NULL) == 0);
  57         tdb_close(tdb);
  58
  59         /* No coalescing can be done due to used record */
  60         layout = new_tdb_layout();
  61         tdb_layout_add_zone(layout, zone_bits, false);
  62         tdb_layout_add_free(layout, 1024);
  63         tdb_layout_add_used(layout, key, data, 6);
  64         tdb = tdb_layout_get(layout);
  65         zone_off = layout->elem[0].base.off;
  66         ok1(free_record_length(tdb, layout->elem[1].base.off) == 1024);
  67         ok1(tdb_check(tdb, NULL, NULL) == 0);
  68
  69         /* Figure out which bucket free entry is. */
  70         b_off = bucket_off(zone_off, size_to_bucket(zone_bits, 1024));
  71         /* Lock and fail to coalesce. */
  72         ok1(tdb_lock_free_bucket(tdb, b_off, TDB_LOCK_WAIT) == 0);
  73         ok1(coalesce(tdb, zone_off, zone_bits, layout->elem[1].base.off,
  74                      b_off, 1024) == 0);
  75         tdb_unlock_free_bucket(tdb, b_off);
  76         ok1(free_record_length(tdb, layout->elem[1].base.off) == 1024);
  77         ok1(tdb_check(tdb, NULL, NULL) == 0);
  78         tdb_close(tdb);
  79
  80         /* Coalescing can be done due to two free records, then EOF */
  81         layout = new_tdb_layout();
  82         tdb_layout_add_zone(layout, zone_bits, false);
  83         tdb_layout_add_free(layout, 1024);
  84         tdb = tdb_layout_get(layout);
  85         zone_off = layout->elem[0].base.off;
  86         len = layout->elem[2].free.len;
  87         ok1(free_record_length(tdb, layout->elem[1].base.off) == 1024);
  88         ok1(free_record_length(tdb, layout->elem[2].base.off) == len);
  89         ok1(tdb_check(tdb, NULL, NULL) == 0);
  90
  91         /* Figure out which bucket (first) free entry is. */
  92         b_off = bucket_off(zone_off, size_to_bucket(zone_bits, 1024));
  93         /* Lock and coalesce. */
  94         ok1(tdb_lock_free_bucket(tdb, b_off, TDB_LOCK_WAIT) == 0);
  95         ok1(coalesce(tdb, zone_off, zone_bits, layout->elem[1].base.off,
  96                      b_off, 1024) == 1);
  97         ok1(!tdb_has_locks(tdb));
  98         ok1(free_record_length(tdb, layout->elem[1].base.off)
  99             == 1024 + sizeof(struct tdb_used_record) + len);
 100         ok1(tdb_check(tdb, NULL, NULL) == 0);
 101         tdb_close(tdb);
 102
 103         /* Coalescing can be done due to two free records, then data */
 104         layout = new_tdb_layout();
 105         tdb_layout_add_zone(layout, zone_bits, false);
 106         tdb_layout_add_free(layout, 1024);
 107         tdb_layout_add_free(layout, 512);
 108         tdb_layout_add_used(layout, key, data, 6);
 109         tdb = tdb_layout_get(layout);
 110         zone_off = layout->elem[0].base.off;
 111         ok1(free_record_length(tdb, layout->elem[1].base.off) == 1024);
 112         ok1(free_record_length(tdb, layout->elem[2].base.off) == 512);
 113         ok1(tdb_check(tdb, NULL, NULL) == 0);
 114
 115         /* Figure out which bucket free entry is. */
 116         b_off = bucket_off(zone_off, size_to_bucket(zone_bits, 1024));
 117         /* Lock and coalesce. */
 118         ok1(tdb_lock_free_bucket(tdb, b_off, TDB_LOCK_WAIT) == 0);
 119         ok1(coalesce(tdb, zone_off, zone_bits, layout->elem[1].base.off,
 120                      b_off, 1024) == 1);
 121         ok1(!tdb_has_locks(tdb));
 122         ok1(free_record_length(tdb, layout->elem[1].base.off)
 123             == 1024 + sizeof(struct tdb_used_record) + 512);
 124         ok1(tdb_check(tdb, NULL, NULL) == 0);
 125         tdb_close(tdb);
 126
 127         /* Coalescing can be done due to three free records, then EOF */
 128         layout = new_tdb_layout();
 129         tdb_layout_add_zone(layout, zone_bits, false);
 130         tdb_layout_add_free(layout, 1024);
 131         tdb_layout_add_free(layout, 512);
 132         tdb = tdb_layout_get(layout);
 133         zone_off = layout->elem[0].base.off;
 134         len = layout->elem[3].free.len;
 135         ok1(free_record_length(tdb, layout->elem[1].base.off) == 1024);
 136         ok1(free_record_length(tdb, layout->elem[2].base.off) == 512);
 137         ok1(free_record_length(tdb, layout->elem[3].base.off) == len);
 138         ok1(tdb_check(tdb, NULL, NULL) == 0);
 139
 140         /* Figure out which bucket free entry is. */
 141         b_off = bucket_off(zone_off, size_to_bucket(zone_bits, 1024));
 142         /* Lock and coalesce. */
 143         ok1(tdb_lock_free_bucket(tdb, b_off, TDB_LOCK_WAIT) == 0);
 144         ok1(coalesce(tdb, zone_off, zone_bits, layout->elem[1].base.off,
 145                      b_off, 1024) == 1);
 146         ok1(!tdb_has_locks(tdb));
 147         ok1(free_record_length(tdb, layout->elem[1].base.off)
 148             == 1024 + sizeof(struct tdb_used_record) + 512
 149             + sizeof(struct tdb_used_record) + len);
 150         ok1(tdb_check(tdb, NULL, NULL) == 0);
 151         tdb_close(tdb);
 152
 153         /* Coalescing across two zones isn't possible. */
 154         layout = new_tdb_layout();
 155         tdb_layout_add_zone(layout, zone_bits, false);
 156         tdb_layout_add_zone(layout, zone_bits, true);
 157         tdb = tdb_layout_get(layout);
 158         zone_off = layout->elem[0].base.off;
 159         len = layout->elem[1].free.len;
 160         ok1(free_record_length(tdb, layout->elem[1].base.off) == len);
 161         ok1(tdb_check(tdb, NULL, NULL) == 0);
 162
 163         /* Figure out which list free entry is. */
 164         b_off = bucket_off(zone_off, size_to_bucket(zone_bits, len));
 165         /* Lock and coalesce. */
 166         ok1(tdb_lock_free_bucket(tdb, b_off, TDB_LOCK_WAIT) == 0);
 167         ok1(coalesce(tdb, zone_off, zone_bits, layout->elem[1].base.off,
 168                      b_off, len) == 0);
 169         tdb_unlock_free_bucket(tdb, b_off);
 170         ok1(!tdb_has_locks(tdb));
 171         ok1(free_record_length(tdb, layout->elem[1].base.off) == len);
 172         ok1(tdb_check(tdb, NULL, NULL) == 0);
 173         tdb_close(tdb);
 174
 175         ok1(tap_log_messages == 0);
 176         return exit_status();
 177 }