lib/tdb/test/run-rescue.c

   1 #include "../common/tdb_private.h"
   2 #include "../common/io.c"
   3 #include "../common/tdb.c"
   4 #include "../common/lock.c"
   5 #include "../common/freelist.c"
   6 #include "../common/traverse.c"
   7 #include "../common/transaction.c"
   8 #include "../common/error.c"
   9 #include "../common/open.c"
  10 #include "../common/check.c"
  11 #include "../common/hash.c"
  12 #include "../common/rescue.c"
  13 #include "tap-interface.h"
  14 #include <stdlib.h>
  15 #include "logging.h"
  16
  17 struct walk_data {
  18         TDB_DATA key;
  19         TDB_DATA data;
  20         bool fail;
  21         unsigned count;
  22 };
  23
  24 static inline bool tdb_deq(TDB_DATA a, TDB_DATA b)
  25 {
  26         return a.dsize == b.dsize && memcmp(a.dptr, b.dptr, a.dsize) == 0;
  27 }
  28
  29 static inline TDB_DATA tdb_mkdata(const void *p, size_t len)
  30 {
  31         TDB_DATA d;
  32         d.dptr = (void *)p;
  33         d.dsize = len;
  34         return d;
  35 }
  36
  37 static void walk(TDB_DATA key, TDB_DATA data, void *_wd)
  38 {
  39         struct walk_data *wd = _wd;
  40
  41         if (!tdb_deq(key, wd->key)) {
  42                 wd->fail = true;
  43         }
  44
  45         if (!tdb_deq(data, wd->data)) {
  46                 wd->fail = true;
  47         }
  48         wd->count++;
  49 }
  50
  51 static void count_records(TDB_DATA key, TDB_DATA data, void *_wd)
  52 {
  53         struct walk_data *wd = _wd;
  54
  55         if (!tdb_deq(key, wd->key) || !tdb_deq(data, wd->data))
  56                 diag("%.*s::%.*s\n",
  57                      (int)key.dsize, key.dptr, (int)data.dsize, data.dptr);
  58         wd->count++;
  59 }
  60
  61 static void log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...)
  62 {
  63         unsigned int *count = tdb_get_logging_private(tdb);
  64         (*count)++;
  65 }
  66
  67 int main(int argc, char *argv[])
  68 {
  69         struct tdb_context *tdb;
  70         struct walk_data wd;
  71         unsigned int i, size, log_count = 0;
  72         struct tdb_logging_context log_ctx = { log_fn, &log_count };
  73
  74         plan_tests(8);
  75         tdb = tdb_open_ex("run-rescue.tdb", 1, TDB_CLEAR_IF_FIRST,
  76                           O_CREAT|O_TRUNC|O_RDWR, 0600, &log_ctx, NULL);
  77
  78         wd.key.dsize = strlen("hi");
  79         wd.key.dptr = (void *)"hi";
  80         wd.data.dsize = strlen("world");
  81         wd.data.dptr = (void *)"world";
  82         wd.count = 0;
  83         wd.fail = false;
  84
  85         ok1(tdb_store(tdb, wd.key, wd.data, TDB_INSERT) == 0);
  86
  87         ok1(tdb_rescue(tdb, walk, &wd) == 0);
  88         ok1(!wd.fail);
  89         ok1(wd.count == 1);
  90
  91         /* Corrupt the database, walk should either get it or not. */
  92         size = tdb->map_size;
  93         for (i = sizeof(struct tdb_header); i < size; i++) {
  94                 char c;
  95                 if (tdb->methods->tdb_read(tdb, i, &c, 1, false) != 0)
  96                         fail("Reading offset %i", i);
  97                 if (tdb->methods->tdb_write(tdb, i, "X", 1) != 0)
  98                         fail("Writing X at offset %i", i);
  99
 100                 wd.count = 0;
 101                 if (tdb_rescue(tdb, count_records, &wd) != 0) {
 102                         wd.fail = true;
 103                         break;
 104                 }
 105                 /* Could be 0 or 1. */
 106                 if (wd.count > 1) {
 107                         wd.fail = true;
 108                         break;
 109                 }
 110                 if (tdb->methods->tdb_write(tdb, i, &c, 1) != 0)
 111                         fail("Restoring offset %i", i);
 112         }
 113         ok1(log_count == 0);
 114         ok1(!wd.fail);
 115         tdb_close(tdb);
 116
 117         /* Now try our known-corrupt db. */
 118         tdb = tdb_open_ex("test/tdb.corrupt", 1024, 0, O_RDWR, 0,
 119                           &taplogctx, NULL);
 120         wd.count = 0;
 121         ok1(tdb_rescue(tdb, count_records, &wd) == 0);
 122         ok1(wd.count == 1627);
 123         tdb_close(tdb);
 124
 125         return exit_status();
 126 }