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 <setjmp.h>
  27 #include "external-agent.h"
  28 #include "logging.h"
  29
  30 #undef write
  31 #undef pwrite
  32 #undef fcntl
  33 #undef ftruncate
  34
  35 static bool in_transaction;
  36 static int target, current;
  37 static jmp_buf jmpbuf;
  38 #define TEST_DBNAME "run-die-during-transaction.tdb"
  39 #define KEY_STRING "helloworld"
  40
  41 static void maybe_die(int fd)
  42 {
  43         if (in_transaction && current++ == target) {
  44                 longjmp(jmpbuf, 1);
  45         }
  46 }
  47
  48 static ssize_t pwrite_check(int fd,
  49                             const void *buf, size_t count, off_t offset)
  50 {
  51         ssize_t ret;
  52
  53         maybe_die(fd);
  54
  55         ret = pwrite(fd, buf, count, offset);
  56         if (ret != count)
  57                 return ret;
  58
  59         maybe_die(fd);
  60         return ret;
  61 }
  62
  63 static ssize_t write_check(int fd, const void *buf, size_t count)
  64 {
  65         ssize_t ret;
  66
  67         maybe_die(fd);
  68
  69         ret = write(fd, buf, count);
  70         if (ret != count)
  71                 return ret;
  72
  73         maybe_die(fd);
  74         return ret;
  75 }
  76
  77 static int ftruncate_check(int fd, off_t length)
  78 {
  79         int ret;
  80
  81         maybe_die(fd);
  82
  83         ret = ftruncate(fd, length);
  84
  85         maybe_die(fd);
  86         return ret;
  87 }
  88
  89 static bool test_death(enum operation op, struct agent *agent)
  90 {
  91         struct tdb_context *tdb = NULL;
  92         TDB_DATA key;
  93         enum agent_return ret;
  94         int needed_recovery = 0;
  95
  96         current = target = 0;
  97 reset:
  98         unlink(TEST_DBNAME);
  99         tdb = tdb_open_ex(TEST_DBNAME, 1024, TDB_NOMMAP,
 100                           O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
 101
 102         if (setjmp(jmpbuf) != 0) {
 103                 /* We're partway through.  Simulate our death. */
 104                 close(tdb->fd);
 105                 forget_locking();
 106                 in_transaction = false;
 107
 108                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 109                 if (ret == SUCCESS)
 110                         needed_recovery++;
 111                 else if (ret != FAILED) {
 112                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 113                              agent_return_name(ret));
 114                         return false;
 115                 }
 116
 117                 ret = external_agent_operation(agent, op, KEY_STRING);
 118                 if (ret != SUCCESS) {
 119                         diag("Step %u op %s failed = %s", current,
 120                              operation_name(op),
 121                              agent_return_name(ret));
 122                         return false;
 123                 }
 124
 125                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 126                 if (ret != FAILED) {
 127                         diag("Still needs recovery after step %u = %s",
 128                              current, agent_return_name(ret));
 129                         return false;
 130                 }
 131
 132                 ret = external_agent_operation(agent, CHECK, "");
 133                 if (ret != SUCCESS) {
 134                         diag("Step %u check failed = %s", current,
 135                              agent_return_name(ret));
 136                         return false;
 137                 }
 138
 139                 ret = external_agent_operation(agent, CLOSE, "");
 140                 if (ret != SUCCESS) {
 141                         diag("Step %u close failed = %s", current,
 142                              agent_return_name(ret));
 143                         return false;
 144                 }
 145
 146                 /* Suppress logging as this tries to use closed fd. */
 147                 suppress_logging = true;
 148                 suppress_lockcheck = true;
 149                 tdb_close(tdb);
 150                 suppress_logging = false;
 151                 suppress_lockcheck = false;
 152                 target++;
 153                 current = 0;
 154                 goto reset;
 155         }
 156
 157         /* Put key for agent to fetch. */
 158         key.dsize = strlen(KEY_STRING);
 159         key.dptr = (void *)KEY_STRING;
 160         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 161                 return false;
 162
 163         /* This is the key we insert in transaction. */
 164         key.dsize--;
 165
 166         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 167         if (ret != SUCCESS)
 168                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 169
 170         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 171         if (ret != SUCCESS)
 172                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 173
 174         in_transaction = true;
 175         if (tdb_transaction_start(tdb) != 0)
 176                 return false;
 177
 178         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 179                 return false;
 180
 181         if (tdb_transaction_commit(tdb) != 0)
 182                 return false;
 183
 184         in_transaction = false;
 185
 186         /* We made it! */
 187         diag("Completed %u runs", current);
 188         tdb_close(tdb);
 189         ret = external_agent_operation(agent, CLOSE, "");
 190         if (ret != SUCCESS) {
 191                 diag("Step %u close failed = %s", current,
 192                      agent_return_name(ret));
 193                 return false;
 194         }
 195
 196 #ifdef HAVE_INCOHERENT_MMAP
 197         /* This means we always mmap, which makes this test a noop. */
 198         ok1(1);
 199 #else
 200         ok1(needed_recovery);
 201 #endif
 202         ok1(locking_errors == 0);
 203         ok1(forget_locking() == 0);
 204         locking_errors = 0;
 205         return true;
 206 }
 207
 208 int main(int argc, char *argv[])
 209 {
 210         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 211         struct agent *agent;
 212         int i;
 213
 214         plan_tests(12);
 215         unlock_callback = maybe_die;
 216
 217         agent = prepare_external_agent();
 218         if (!agent)
 219                 err(1, "preparing agent");
 220
 221         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 222                 diag("Testing %s after death", operation_name(ops[i]));
 223                 ok1(test_death(ops[i], agent));
 224         }
 225
 226         return exit_status();
 227 }