lib/tdb/test/run-die-during-transaction.c

   1 #include "../common/tdb_private.h"
   2 #include "lock-tracking.h"
   3 static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
   4 static ssize_t write_check(int fd, const void *buf, size_t count);
   5 static int ftruncate_check(int fd, off_t length);
   6
   7 #define pwrite pwrite_check
   8 #define write write_check
   9 #define fcntl fcntl_with_lockcheck
  10 #define ftruncate ftruncate_check
  11
  12 #include "../common/io.c"
  13 #include "../common/tdb.c"
  14 #include "../common/lock.c"
  15 #include "../common/freelist.c"
  16 #include "../common/traverse.c"
  17 #include "../common/transaction.c"
  18 #include "../common/error.c"
  19 #include "../common/open.c"
  20 #include "../common/check.c"
  21 #include "../common/hash.c"
  22 #include "tap-interface.h"
  23 #include <stdlib.h>
  24 #include <stdbool.h>
  25 #include <stdarg.h>
  26 #include <err.h>
  27 #include <setjmp.h>
  28 #include "external-agent.h"
  29 #include "logging.h"
  30
  31 #undef write
  32 #undef pwrite
  33 #undef fcntl
  34 #undef ftruncate
  35
  36 static bool in_transaction;
  37 static int target, current;
  38 static jmp_buf jmpbuf;
  39 #define TEST_DBNAME "run-die-during-transaction.tdb"
  40 #define KEY_STRING "helloworld"
  41
  42 static void maybe_die(int fd)
  43 {
  44         if (in_transaction && current++ == target) {
  45                 longjmp(jmpbuf, 1);
  46         }
  47 }
  48
  49 static ssize_t pwrite_check(int fd,
  50                             const void *buf, size_t count, off_t offset)
  51 {
  52         ssize_t ret;
  53
  54         maybe_die(fd);
  55
  56         ret = pwrite(fd, buf, count, offset);
  57         if (ret != count)
  58                 return ret;
  59
  60         maybe_die(fd);
  61         return ret;
  62 }
  63
  64 static ssize_t write_check(int fd, const void *buf, size_t count)
  65 {
  66         ssize_t ret;
  67
  68         maybe_die(fd);
  69
  70         ret = write(fd, buf, count);
  71         if (ret != count)
  72                 return ret;
  73
  74         maybe_die(fd);
  75         return ret;
  76 }
  77
  78 static int ftruncate_check(int fd, off_t length)
  79 {
  80         int ret;
  81
  82         maybe_die(fd);
  83
  84         ret = ftruncate(fd, length);
  85
  86         maybe_die(fd);
  87         return ret;
  88 }
  89
  90 static bool test_death(enum operation op, struct agent *agent)
  91 {
  92         struct tdb_context *tdb = NULL;
  93         TDB_DATA key;
  94         enum agent_return ret;
  95         int needed_recovery = 0;
  96
  97         current = target = 0;
  98 reset:
  99         unlink(TEST_DBNAME);
 100         tdb = tdb_open_ex(TEST_DBNAME, 1024, TDB_NOMMAP,
 101                           O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
 102
 103         if (setjmp(jmpbuf) != 0) {
 104                 /* We're partway through.  Simulate our death. */
 105                 close(tdb->fd);
 106                 forget_locking();
 107                 in_transaction = false;
 108
 109                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 110                 if (ret == SUCCESS)
 111                         needed_recovery++;
 112                 else if (ret != FAILED) {
 113                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 114                              agent_return_name(ret));
 115                         return false;
 116                 }
 117
 118                 ret = external_agent_operation(agent, op, KEY_STRING);
 119                 if (ret != SUCCESS) {
 120                         diag("Step %u op %s failed = %s", current,
 121                              operation_name(op),
 122                              agent_return_name(ret));
 123                         return false;
 124                 }
 125
 126                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 127                 if (ret != FAILED) {
 128                         diag("Still needs recovery after step %u = %s",
 129                              current, agent_return_name(ret));
 130                         return false;
 131                 }
 132
 133                 ret = external_agent_operation(agent, CHECK, "");
 134                 if (ret != SUCCESS) {
 135                         diag("Step %u check failed = %s", current,
 136                              agent_return_name(ret));
 137                         return false;
 138                 }
 139
 140                 ret = external_agent_operation(agent, CLOSE, "");
 141                 if (ret != SUCCESS) {
 142                         diag("Step %u close failed = %s", current,
 143                              agent_return_name(ret));
 144                         return false;
 145                 }
 146
 147                 /* Suppress logging as this tries to use closed fd. */
 148                 suppress_logging = true;
 149                 suppress_lockcheck = true;
 150                 tdb_close(tdb);
 151                 suppress_logging = false;
 152                 suppress_lockcheck = false;
 153                 target++;
 154                 current = 0;
 155                 goto reset;
 156         }
 157
 158         /* Put key for agent to fetch. */
 159         key.dsize = strlen(KEY_STRING);
 160         key.dptr = (void *)KEY_STRING;
 161         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 162                 return false;
 163
 164         /* This is the key we insert in transaction. */
 165         key.dsize--;
 166
 167         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 168         if (ret != SUCCESS)
 169                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 170
 171         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 172         if (ret != SUCCESS)
 173                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 174
 175         in_transaction = true;
 176         if (tdb_transaction_start(tdb) != 0)
 177                 return false;
 178
 179         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 180                 return false;
 181
 182         if (tdb_transaction_commit(tdb) != 0)
 183                 return false;
 184
 185         in_transaction = false;
 186
 187         /* We made it! */
 188         diag("Completed %u runs", current);
 189         tdb_close(tdb);
 190         ret = external_agent_operation(agent, CLOSE, "");
 191         if (ret != SUCCESS) {
 192                 diag("Step %u close failed = %s", current,
 193                      agent_return_name(ret));
 194                 return false;
 195         }
 196
 197         ok1(needed_recovery);
 198         ok1(locking_errors == 0);
 199         ok1(forget_locking() == 0);
 200         locking_errors = 0;
 201         return true;
 202 }
 203
 204 int main(int argc, char *argv[])
 205 {
 206         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 207         struct agent *agent;
 208         int i;
 209
 210         plan_tests(12);
 211         unlock_callback = maybe_die;
 212
 213         agent = prepare_external_agent();
 214         if (!agent)
 215                 err(1, "preparing agent");
 216
 217         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 218                 diag("Testing %s after death", operation_name(ops[i]));
 219                 ok1(test_death(ops[i], agent));
 220         }
 221
 222         return exit_status();
 223 }