git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/run-57-die-during-transaction.c

   1 #define _XOPEN_SOURCE 500
   2 #include <unistd.h>
   3 #include "lock-tracking.h"
   4 static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
   5 static ssize_t write_check(int fd, const void *buf, size_t count);
   6 static int ftruncate_check(int fd, off_t length);
   7
   8 #define pwrite pwrite_check
   9 #define write write_check
  10 #define fcntl fcntl_with_lockcheck
  11 #define ftruncate ftruncate_check
  12
  13 #include <ccan/tdb2/tdb.c>
  14 #include <ccan/tdb2/free.c>
  15 #include <ccan/tdb2/lock.c>
  16 #include <ccan/tdb2/io.c>
  17 #include <ccan/tdb2/hash.c>
  18 #include <ccan/tdb2/check.c>
  19 #include <ccan/tdb2/transaction.c>
  20 #include <ccan/tap/tap.h>
  21 #include <stdlib.h>
  22 #include <stdbool.h>
  23 #include <stdarg.h>
  24 #include <err.h>
  25 #include <setjmp.h>
  26 #include "external-agent.h"
  27 #include "logging.h"
  28
  29 #undef write
  30 #undef pwrite
  31 #undef fcntl
  32 #undef ftruncate
  33
  34 static bool in_transaction;
  35 static int target, current;
  36 static jmp_buf jmpbuf;
  37 #define TEST_DBNAME "run-57-die-during-transaction.tdb"
  38 #define KEY_STRING "helloworld"
  39
  40 static void maybe_die(int fd)
  41 {
  42         if (in_transaction && current++ == target) {
  43                 longjmp(jmpbuf, 1);
  44         }
  45 }
  46
  47 static ssize_t pwrite_check(int fd,
  48                             const void *buf, size_t count, off_t offset)
  49 {
  50         ssize_t ret;
  51
  52         maybe_die(fd);
  53
  54         ret = pwrite(fd, buf, count, offset);
  55         if (ret != count)
  56                 return ret;
  57
  58         maybe_die(fd);
  59         return ret;
  60 }
  61
  62 static ssize_t write_check(int fd, const void *buf, size_t count)
  63 {
  64         ssize_t ret;
  65
  66         maybe_die(fd);
  67
  68         ret = write(fd, buf, count);
  69         if (ret != count)
  70                 return ret;
  71
  72         maybe_die(fd);
  73         return ret;
  74 }
  75
  76 static int ftruncate_check(int fd, off_t length)
  77 {
  78         int ret;
  79
  80         maybe_die(fd);
  81
  82         ret = ftruncate(fd, length);
  83
  84         maybe_die(fd);
  85         return ret;
  86 }
  87
  88 static bool test_death(enum operation op, struct agent *agent)
  89 {
  90         struct tdb_context *tdb = NULL;
  91         TDB_DATA key;
  92         enum agent_return ret;
  93         int needed_recovery = 0;
  94
  95         current = target = 0;
  96 reset:
  97         unlink(TEST_DBNAME);
  98         tdb = tdb_open(TEST_DBNAME, TDB_NOMMAP,
  99                        O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
 100
 101         if (setjmp(jmpbuf) != 0) {
 102                 /* We're partway through.  Simulate our death. */
 103                 close(tdb->fd);
 104                 forget_locking();
 105                 in_transaction = false;
 106
 107                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 108                 if (ret == SUCCESS)
 109                         needed_recovery++;
 110                 else if (ret != FAILED) {
 111                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 112                              agent_return_name(ret));
 113                         return false;
 114                 }
 115
 116                 ret = external_agent_operation(agent, op, KEY_STRING);
 117                 if (ret != SUCCESS) {
 118                         diag("Step %u op %s failed = %s", current,
 119                              operation_name(op),
 120                              agent_return_name(ret));
 121                         return false;
 122                 }
 123
 124                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 125                 if (ret != FAILED) {
 126                         diag("Still needs recovery after step %u = %s",
 127                              current, agent_return_name(ret));
 128                         return false;
 129                 }
 130
 131                 ret = external_agent_operation(agent, CHECK, "");
 132                 if (ret != SUCCESS) {
 133                         diag("Step %u check failed = %s", current,
 134                              agent_return_name(ret));
 135                         return false;
 136                 }
 137
 138                 ret = external_agent_operation(agent, CLOSE, "");
 139                 if (ret != SUCCESS) {
 140                         diag("Step %u close failed = %s", current,
 141                              agent_return_name(ret));
 142                         return false;
 143                 }
 144
 145                 /* Suppress logging as this tries to use closed fd. */
 146                 suppress_logging = true;
 147                 suppress_lockcheck = true;
 148                 tdb_close(tdb);
 149                 suppress_logging = false;
 150                 suppress_lockcheck = false;
 151                 target++;
 152                 current = 0;
 153                 goto reset;
 154         }
 155
 156         /* Put key for agent to fetch. */
 157         key.dsize = strlen(KEY_STRING);
 158         key.dptr = (void *)KEY_STRING;
 159         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 160                 return false;
 161
 162         /* This is the key we insert in transaction. */
 163         key.dsize--;
 164
 165         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 166         if (ret != SUCCESS)
 167                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 168
 169         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 170         if (ret != SUCCESS)
 171                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 172
 173         in_transaction = true;
 174         if (tdb_transaction_start(tdb) != 0)
 175                 return false;
 176
 177         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 178                 return false;
 179
 180         if (tdb_transaction_commit(tdb) != 0)
 181                 return false;
 182
 183         in_transaction = false;
 184
 185         /* We made it! */
 186         diag("Completed %u runs", current);
 187         tdb_close(tdb);
 188         ret = external_agent_operation(agent, CLOSE, "");
 189         if (ret != SUCCESS) {
 190                 diag("Step %u close failed = %s", current,
 191                      agent_return_name(ret));
 192                 return false;
 193         }
 194
 195         ok1(needed_recovery);
 196         ok1(locking_errors == 0);
 197         ok1(forget_locking() == 0);
 198         locking_errors = 0;
 199         return true;
 200 }
 201
 202 int main(int argc, char *argv[])
 203 {
 204         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 205         struct agent *agent;
 206         int i;
 207
 208         plan_tests(12);
 209         unlock_callback = maybe_die;
 210
 211         agent = prepare_external_agent();
 212         if (!agent)
 213                 err(1, "preparing agent");
 214
 215         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 216                 diag("Testing %s after death", operation_name(ops[i]));
 217                 ok1(test_death(ops[i], agent));
 218         }
 219
 220         return exit_status();
 221 }