git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/run-tdb1-die-during-transaction.c

   1 #include <ccan/tdb2/private.h>
   2 #include <unistd.h>
   3 #include "tdb1-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_lockcheck1
  11 #define ftruncate ftruncate_check
  12
  13 #include "tdb2-source.h"
  14 #include <ccan/tap/tap.h>
  15 #include <stdlib.h>
  16 #include <stdbool.h>
  17 #include <stdarg.h>
  18 #include <err.h>
  19 #include <setjmp.h>
  20 #include "tdb1-external-agent.h"
  21 #include "logging.h"
  22
  23 #undef write
  24 #undef pwrite
  25 #undef fcntl
  26 #undef ftruncate
  27
  28 static bool in_transaction;
  29 static int target, current;
  30 static jmp_buf jmpbuf;
  31 #define TEST_DBNAME "run-die-during-transaction.tdb1"
  32 #define KEY_STRING "helloworld"
  33
  34 static void maybe_die(int fd)
  35 {
  36         if (in_transaction && current++ == target) {
  37                 longjmp(jmpbuf, 1);
  38         }
  39 }
  40
  41 static ssize_t pwrite_check(int fd,
  42                             const void *buf, size_t count, off_t offset)
  43 {
  44         ssize_t ret;
  45
  46         maybe_die(fd);
  47
  48         ret = pwrite(fd, buf, count, offset);
  49         if (ret != count)
  50                 return ret;
  51
  52         maybe_die(fd);
  53         return ret;
  54 }
  55
  56 static ssize_t write_check(int fd, const void *buf, size_t count)
  57 {
  58         ssize_t ret;
  59
  60         maybe_die(fd);
  61
  62         ret = write(fd, buf, count);
  63         if (ret != count)
  64                 return ret;
  65
  66         maybe_die(fd);
  67         return ret;
  68 }
  69
  70 static int ftruncate_check(int fd, off_t length)
  71 {
  72         int ret;
  73
  74         maybe_die(fd);
  75
  76         ret = ftruncate(fd, length);
  77
  78         maybe_die(fd);
  79         return ret;
  80 }
  81
  82 static bool test_death(enum operation op, struct agent *agent)
  83 {
  84         struct tdb_context *tdb = NULL;
  85         TDB_DATA key;
  86         enum agent_return ret;
  87         int needed_recovery = 0;
  88         union tdb_attribute hsize;
  89
  90         hsize.base.attr = TDB_ATTRIBUTE_TDB1_HASHSIZE;
  91         hsize.base.next = &tap_log_attr;
  92         hsize.tdb1_hashsize.hsize = 1024;
  93
  94         current = target = 0;
  95 reset:
  96         unlink(TEST_DBNAME);
  97         tdb = tdb_open(TEST_DBNAME, TDB_VERSION1|TDB_NOMMAP,
  98                        O_CREAT|O_TRUNC|O_RDWR, 0600, &hsize);
  99
 100         if (setjmp(jmpbuf) != 0) {
 101                 /* We're partway through.  Simulate our death. */
 102                 close(tdb->file->fd);
 103                 forget_locking1();
 104                 in_transaction = false;
 105
 106                 ret = external_agent_operation1(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_name1(ret));
 112                         return false;
 113                 }
 114
 115                 ret = external_agent_operation1(agent, op, KEY_STRING);
 116                 if (ret != SUCCESS) {
 117                         diag("Step %u op %s failed = %s", current,
 118                              operation_name1(op),
 119                              agent_return_name1(ret));
 120                         return false;
 121                 }
 122
 123                 ret = external_agent_operation1(agent, NEEDS_RECOVERY, "");
 124                 if (ret != FAILED) {
 125                         diag("Still needs recovery after step %u = %s",
 126                              current, agent_return_name1(ret));
 127                         return false;
 128                 }
 129
 130                 ret = external_agent_operation1(agent, CHECK, "");
 131                 if (ret != SUCCESS) {
 132                         diag("Step %u check failed = %s", current,
 133                              agent_return_name1(ret));
 134                         return false;
 135                 }
 136
 137                 ret = external_agent_operation1(agent, CLOSE, "");
 138                 if (ret != SUCCESS) {
 139                         diag("Step %u close failed = %s", current,
 140                              agent_return_name1(ret));
 141                         return false;
 142                 }
 143
 144                 /* Suppress logging as this tries to use closed fd. */
 145                 suppress_logging = true;
 146                 suppress_lockcheck1 = true;
 147                 tdb_close(tdb);
 148                 suppress_logging = false;
 149                 suppress_lockcheck1 = false;
 150                 target++;
 151                 current = 0;
 152                 goto reset;
 153         }
 154
 155         /* Put key for agent to fetch. */
 156         key.dsize = strlen(KEY_STRING);
 157         key.dptr = (void *)KEY_STRING;
 158         if (tdb_store(tdb, key, key, TDB_INSERT) != TDB_SUCCESS)
 159                 return false;
 160
 161         /* This is the key we insert in transaction. */
 162         key.dsize--;
 163
 164         ret = external_agent_operation1(agent, OPEN, TEST_DBNAME);
 165         if (ret != SUCCESS)
 166                 errx(1, "Agent failed to open: %s", agent_return_name1(ret));
 167
 168         ret = external_agent_operation1(agent, FETCH, KEY_STRING);
 169         if (ret != SUCCESS)
 170                 errx(1, "Agent failed find key: %s", agent_return_name1(ret));
 171
 172         in_transaction = true;
 173         if (tdb_transaction_start(tdb) != TDB_SUCCESS)
 174                 return false;
 175
 176         if (tdb_store(tdb, key, key, TDB_INSERT) != TDB_SUCCESS)
 177                 return false;
 178
 179         if (tdb_transaction_commit(tdb) != TDB_SUCCESS)
 180                 return false;
 181
 182         in_transaction = false;
 183
 184         /* We made it! */
 185         diag("Completed %u runs", current);
 186         tdb_close(tdb);
 187         ret = external_agent_operation1(agent, CLOSE, "");
 188         if (ret != SUCCESS) {
 189                 diag("Step %u close failed = %s", current,
 190                      agent_return_name1(ret));
 191                 return false;
 192         }
 193
 194         ok1(needed_recovery);
 195         ok1(locking_errors1 == 0);
 196         ok1(forget_locking1() == 0);
 197         locking_errors1 = 0;
 198         return true;
 199 }
 200
 201 int main(int argc, char *argv[])
 202 {
 203         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 204         struct agent *agent;
 205         int i;
 206
 207         plan_tests(12);
 208         unlock_callback1 = maybe_die;
 209
 210         agent = prepare_external_agent1();
 211         if (!agent)
 212                 err(1, "preparing agent");
 213
 214         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 215                 diag("Testing %s after death", operation_name1(ops[i]));
 216                 ok1(test_death(ops[i], agent));
 217         }
 218
 219         return exit_status();
 220 }