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