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

   1 #include <ccan/tdb2/private.h>
   2 #include <unistd.h>
   3 #include "lock-tracking.h"
   4 #include <ccan/tap/tap.h>
   5 #include <stdlib.h>
   6 #include <assert.h>
   7 static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
   8 static ssize_t write_check(int fd, const void *buf, size_t count);
   9 static int ftruncate_check(int fd, off_t length);
  10
  11 #define pwrite pwrite_check
  12 #define write write_check
  13 #define fcntl fcntl_with_lockcheck
  14 #define ftruncate ftruncate_check
  15
  16 /* There's a malloc inside transaction_setup_recovery, and valgrind complains
  17  * when we longjmp and leak it. */
  18 #define MAX_ALLOCATIONS 200
  19 static void *allocated[MAX_ALLOCATIONS];
  20
  21 static void *malloc_noleak(size_t len)
  22 {
  23         unsigned int i;
  24
  25         for (i = 0; i < MAX_ALLOCATIONS; i++)
  26                 if (!allocated[i]) {
  27                         allocated[i] = malloc(len);
  28                         return allocated[i];
  29                 }
  30         diag("Too many allocations!");
  31         abort();
  32 }
  33
  34 static void free_noleak(void *p)
  35 {
  36         unsigned int i;
  37
  38         /* We don't catch realloc, so don't care if we miss one. */
  39         for (i = 0; i < MAX_ALLOCATIONS; i++) {
  40                 if (allocated[i] == p) {
  41                         allocated[i] = NULL;
  42                         break;
  43                 }
  44         }
  45         free(p);
  46 }
  47
  48 static void free_all(void)
  49 {
  50         unsigned int i;
  51
  52         for (i = 0; i < MAX_ALLOCATIONS; i++) {
  53                 free(allocated[i]);
  54                 allocated[i] = NULL;
  55         }
  56 }
  57
  58 #define malloc malloc_noleak
  59 #define free free_noleak
  60
  61 #include "tdb2-source.h"
  62
  63 #undef malloc
  64 #undef free
  65 #undef write
  66 #undef pwrite
  67 #undef fcntl
  68 #undef ftruncate
  69
  70 #include <stdbool.h>
  71 #include <stdarg.h>
  72 #include <err.h>
  73 #include <setjmp.h>
  74 #include "external-agent.h"
  75 #include "logging.h"
  76
  77 static bool in_transaction;
  78 static int target, current;
  79 static jmp_buf jmpbuf;
  80 #define TEST_DBNAME "run-57-die-during-transaction.tdb"
  81 #define KEY_STRING "helloworld"
  82
  83 static void maybe_die(int fd)
  84 {
  85         if (in_transaction && current++ == target) {
  86                 longjmp(jmpbuf, 1);
  87         }
  88 }
  89
  90 static ssize_t pwrite_check(int fd,
  91                             const void *buf, size_t count, off_t offset)
  92 {
  93         ssize_t ret;
  94
  95         maybe_die(fd);
  96
  97         ret = pwrite(fd, buf, count, offset);
  98         if (ret != count)
  99                 return ret;
 100
 101         maybe_die(fd);
 102         return ret;
 103 }
 104
 105 static ssize_t write_check(int fd, const void *buf, size_t count)
 106 {
 107         ssize_t ret;
 108
 109         maybe_die(fd);
 110
 111         ret = write(fd, buf, count);
 112         if (ret != count)
 113                 return ret;
 114
 115         maybe_die(fd);
 116         return ret;
 117 }
 118
 119 static int ftruncate_check(int fd, off_t length)
 120 {
 121         int ret;
 122
 123         maybe_die(fd);
 124
 125         ret = ftruncate(fd, length);
 126
 127         maybe_die(fd);
 128         return ret;
 129 }
 130
 131 static bool test_death(enum operation op, struct agent *agent)
 132 {
 133         struct tdb_context *tdb = NULL;
 134         TDB_DATA key;
 135         enum agent_return ret;
 136         int needed_recovery = 0;
 137
 138         current = target = 0;
 139 reset:
 140         unlink(TEST_DBNAME);
 141         tdb = tdb_open(TEST_DBNAME, TDB_NOMMAP,
 142                        O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
 143         if (!tdb) {
 144                 diag("Failed opening TDB: %s", strerror(errno));
 145                 return false;
 146         }
 147
 148         if (setjmp(jmpbuf) != 0) {
 149                 /* We're partway through.  Simulate our death. */
 150                 close(tdb->file->fd);
 151                 forget_locking();
 152                 in_transaction = false;
 153
 154                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 155                 if (ret == SUCCESS)
 156                         needed_recovery++;
 157                 else if (ret != FAILED) {
 158                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 159                              agent_return_name(ret));
 160                         return false;
 161                 }
 162
 163                 ret = external_agent_operation(agent, op, KEY_STRING);
 164                 if (ret != SUCCESS) {
 165                         diag("Step %u op %s failed = %s", current,
 166                              operation_name(op),
 167                              agent_return_name(ret));
 168                         return false;
 169                 }
 170
 171                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 172                 if (ret != FAILED) {
 173                         diag("Still needs recovery after step %u = %s",
 174                              current, agent_return_name(ret));
 175                         return false;
 176                 }
 177
 178                 ret = external_agent_operation(agent, CHECK, "");
 179                 if (ret != SUCCESS) {
 180                         diag("Step %u check failed = %s", current,
 181                              agent_return_name(ret));
 182                         return false;
 183                 }
 184
 185                 ret = external_agent_operation(agent, CLOSE, "");
 186                 if (ret != SUCCESS) {
 187                         diag("Step %u close failed = %s", current,
 188                              agent_return_name(ret));
 189                         return false;
 190                 }
 191
 192                 /* Suppress logging as this tries to use closed fd. */
 193                 suppress_logging = true;
 194                 suppress_lockcheck = true;
 195                 tdb_close(tdb);
 196                 suppress_logging = false;
 197                 suppress_lockcheck = false;
 198                 target++;
 199                 current = 0;
 200                 free_all();
 201                 goto reset;
 202         }
 203
 204         /* Put key for agent to fetch. */
 205         key = tdb_mkdata(KEY_STRING, strlen(KEY_STRING));
 206         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 207                 return false;
 208
 209         /* This is the key we insert in transaction. */
 210         key.dsize--;
 211
 212         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 213         if (ret != SUCCESS)
 214                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 215
 216         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 217         if (ret != SUCCESS)
 218                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 219
 220         in_transaction = true;
 221         if (tdb_transaction_start(tdb) != 0)
 222                 return false;
 223
 224         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 225                 return false;
 226
 227         if (tdb_transaction_commit(tdb) != 0)
 228                 return false;
 229
 230         in_transaction = false;
 231
 232         /* We made it! */
 233         diag("Completed %u runs", current);
 234         tdb_close(tdb);
 235         ret = external_agent_operation(agent, CLOSE, "");
 236         if (ret != SUCCESS) {
 237                 diag("Step %u close failed = %s", current,
 238                      agent_return_name(ret));
 239                 return false;
 240         }
 241
 242         ok1(needed_recovery);
 243         ok1(locking_errors == 0);
 244         ok1(forget_locking() == 0);
 245         locking_errors = 0;
 246         return true;
 247 }
 248
 249 int main(int argc, char *argv[])
 250 {
 251         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 252         struct agent *agent;
 253         int i;
 254
 255         plan_tests(12);
 256         unlock_callback = maybe_die;
 257
 258         agent = prepare_external_agent();
 259         if (!agent)
 260                 err(1, "preparing agent");
 261
 262         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 263                 diag("Testing %s after death", operation_name(ops[i]));
 264                 ok1(test_death(ops[i], agent));
 265         }
 266
 267         free_external_agent(agent);
 268         return exit_status();
 269 }