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

   1 #include "config.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 <ccan/tdb2/tdb.c>
  62 #include <ccan/tdb2/open.c>
  63 #include <ccan/tdb2/free.c>
  64 #include <ccan/tdb2/lock.c>
  65 #include <ccan/tdb2/io.c>
  66 #include <ccan/tdb2/hash.c>
  67 #include <ccan/tdb2/check.c>
  68 #include <ccan/tdb2/transaction.c>
  69 #undef malloc
  70 #undef free
  71 #undef write
  72 #undef pwrite
  73 #undef fcntl
  74 #undef ftruncate
  75
  76 #include <stdbool.h>
  77 #include <stdarg.h>
  78 #include <err.h>
  79 #include <setjmp.h>
  80 #include "external-agent.h"
  81 #include "logging.h"
  82
  83 static bool in_transaction;
  84 static int target, current;
  85 static jmp_buf jmpbuf;
  86 #define TEST_DBNAME "run-57-die-during-transaction.tdb"
  87 #define KEY_STRING "helloworld"
  88
  89 static void maybe_die(int fd)
  90 {
  91         if (in_transaction && current++ == target) {
  92                 longjmp(jmpbuf, 1);
  93         }
  94 }
  95
  96 static ssize_t pwrite_check(int fd,
  97                             const void *buf, size_t count, off_t offset)
  98 {
  99         ssize_t ret;
 100
 101         maybe_die(fd);
 102
 103         ret = pwrite(fd, buf, count, offset);
 104         if (ret != count)
 105                 return ret;
 106
 107         maybe_die(fd);
 108         return ret;
 109 }
 110
 111 static ssize_t write_check(int fd, const void *buf, size_t count)
 112 {
 113         ssize_t ret;
 114
 115         maybe_die(fd);
 116
 117         ret = write(fd, buf, count);
 118         if (ret != count)
 119                 return ret;
 120
 121         maybe_die(fd);
 122         return ret;
 123 }
 124
 125 static int ftruncate_check(int fd, off_t length)
 126 {
 127         int ret;
 128
 129         maybe_die(fd);
 130
 131         ret = ftruncate(fd, length);
 132
 133         maybe_die(fd);
 134         return ret;
 135 }
 136
 137 static bool test_death(enum operation op, struct agent *agent)
 138 {
 139         struct tdb_context *tdb = NULL;
 140         TDB_DATA key;
 141         enum agent_return ret;
 142         int needed_recovery = 0;
 143
 144         current = target = 0;
 145 reset:
 146         unlink(TEST_DBNAME);
 147         tdb = tdb_open(TEST_DBNAME, TDB_NOMMAP,
 148                        O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
 149         if (!tdb) {
 150                 diag("Failed opening TDB: %s", strerror(errno));
 151                 return false;
 152         }
 153
 154         if (setjmp(jmpbuf) != 0) {
 155                 /* We're partway through.  Simulate our death. */
 156                 close(tdb->fd);
 157                 forget_locking();
 158                 in_transaction = false;
 159
 160                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 161                 if (ret == SUCCESS)
 162                         needed_recovery++;
 163                 else if (ret != FAILED) {
 164                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 165                              agent_return_name(ret));
 166                         return false;
 167                 }
 168
 169                 ret = external_agent_operation(agent, op, KEY_STRING);
 170                 if (ret != SUCCESS) {
 171                         diag("Step %u op %s failed = %s", current,
 172                              operation_name(op),
 173                              agent_return_name(ret));
 174                         return false;
 175                 }
 176
 177                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 178                 if (ret != FAILED) {
 179                         diag("Still needs recovery after step %u = %s",
 180                              current, agent_return_name(ret));
 181                         return false;
 182                 }
 183
 184                 ret = external_agent_operation(agent, CHECK, "");
 185                 if (ret != SUCCESS) {
 186                         diag("Step %u check failed = %s", current,
 187                              agent_return_name(ret));
 188                         return false;
 189                 }
 190
 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                 /* Suppress logging as this tries to use closed fd. */
 199                 suppress_logging = true;
 200                 suppress_lockcheck = true;
 201                 tdb_close(tdb);
 202                 suppress_logging = false;
 203                 suppress_lockcheck = false;
 204                 target++;
 205                 current = 0;
 206                 free_all();
 207                 goto reset;
 208         }
 209
 210         /* Put key for agent to fetch. */
 211         key.dsize = strlen(KEY_STRING);
 212         key.dptr = (void *)KEY_STRING;
 213         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 214                 return false;
 215
 216         /* This is the key we insert in transaction. */
 217         key.dsize--;
 218
 219         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 220         if (ret != SUCCESS)
 221                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 222
 223         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 224         if (ret != SUCCESS)
 225                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 226
 227         in_transaction = true;
 228         if (tdb_transaction_start(tdb) != 0)
 229                 return false;
 230
 231         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 232                 return false;
 233
 234         if (tdb_transaction_commit(tdb) != 0)
 235                 return false;
 236
 237         in_transaction = false;
 238
 239         /* We made it! */
 240         diag("Completed %u runs", current);
 241         tdb_close(tdb);
 242         ret = external_agent_operation(agent, CLOSE, "");
 243         if (ret != SUCCESS) {
 244                 diag("Step %u close failed = %s", current,
 245                      agent_return_name(ret));
 246                 return false;
 247         }
 248
 249         ok1(needed_recovery);
 250         ok1(locking_errors == 0);
 251         ok1(forget_locking() == 0);
 252         locking_errors = 0;
 253         return true;
 254 }
 255
 256 int main(int argc, char *argv[])
 257 {
 258         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 259         struct agent *agent;
 260         int i;
 261
 262         plan_tests(12);
 263         unlock_callback = maybe_die;
 264
 265         agent = prepare_external_agent();
 266         if (!agent)
 267                 err(1, "preparing agent");
 268
 269         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 270                 diag("Testing %s after death", operation_name(ops[i]));
 271                 ok1(test_death(ops[i], agent));
 272         }
 273
 274         free_external_agent(agent);
 275         return exit_status();
 276 }