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 #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/free.c>
  63 #include <ccan/tdb2/lock.c>
  64 #include <ccan/tdb2/io.c>
  65 #include <ccan/tdb2/hash.c>
  66 #include <ccan/tdb2/check.c>
  67 #include <ccan/tdb2/transaction.c>
  68 #undef malloc
  69 #undef free
  70 #undef write
  71 #undef pwrite
  72 #undef fcntl
  73 #undef ftruncate
  74
  75 #include <stdbool.h>
  76 #include <stdarg.h>
  77 #include <err.h>
  78 #include <setjmp.h>
  79 #include "external-agent.h"
  80 #include "logging.h"
  81
  82 static bool in_transaction;
  83 static int target, current;
  84 static jmp_buf jmpbuf;
  85 #define TEST_DBNAME "run-57-die-during-transaction.tdb"
  86 #define KEY_STRING "helloworld"
  87
  88 static void maybe_die(int fd)
  89 {
  90         if (in_transaction && current++ == target) {
  91                 longjmp(jmpbuf, 1);
  92         }
  93 }
  94
  95 static ssize_t pwrite_check(int fd,
  96                             const void *buf, size_t count, off_t offset)
  97 {
  98         ssize_t ret;
  99
 100         maybe_die(fd);
 101
 102         ret = pwrite(fd, buf, count, offset);
 103         if (ret != count)
 104                 return ret;
 105
 106         maybe_die(fd);
 107         return ret;
 108 }
 109
 110 static ssize_t write_check(int fd, const void *buf, size_t count)
 111 {
 112         ssize_t ret;
 113
 114         maybe_die(fd);
 115
 116         ret = write(fd, buf, count);
 117         if (ret != count)
 118                 return ret;
 119
 120         maybe_die(fd);
 121         return ret;
 122 }
 123
 124 static int ftruncate_check(int fd, off_t length)
 125 {
 126         int ret;
 127
 128         maybe_die(fd);
 129
 130         ret = ftruncate(fd, length);
 131
 132         maybe_die(fd);
 133         return ret;
 134 }
 135
 136 static bool test_death(enum operation op, struct agent *agent)
 137 {
 138         struct tdb_context *tdb = NULL;
 139         TDB_DATA key;
 140         enum agent_return ret;
 141         int needed_recovery = 0;
 142
 143         current = target = 0;
 144 reset:
 145         unlink(TEST_DBNAME);
 146         tdb = tdb_open(TEST_DBNAME, TDB_NOMMAP,
 147                        O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
 148
 149         if (setjmp(jmpbuf) != 0) {
 150                 /* We're partway through.  Simulate our death. */
 151                 close(tdb->fd);
 152                 forget_locking();
 153                 in_transaction = false;
 154
 155                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 156                 if (ret == SUCCESS)
 157                         needed_recovery++;
 158                 else if (ret != FAILED) {
 159                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 160                              agent_return_name(ret));
 161                         return false;
 162                 }
 163
 164                 ret = external_agent_operation(agent, op, KEY_STRING);
 165                 if (ret != SUCCESS) {
 166                         diag("Step %u op %s failed = %s", current,
 167                              operation_name(op),
 168                              agent_return_name(ret));
 169                         return false;
 170                 }
 171
 172                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 173                 if (ret != FAILED) {
 174                         diag("Still needs recovery after step %u = %s",
 175                              current, agent_return_name(ret));
 176                         return false;
 177                 }
 178
 179                 ret = external_agent_operation(agent, CHECK, "");
 180                 if (ret != SUCCESS) {
 181                         diag("Step %u check failed = %s", current,
 182                              agent_return_name(ret));
 183                         return false;
 184                 }
 185
 186                 ret = external_agent_operation(agent, CLOSE, "");
 187                 if (ret != SUCCESS) {
 188                         diag("Step %u close failed = %s", current,
 189                              agent_return_name(ret));
 190                         return false;
 191                 }
 192
 193                 /* Suppress logging as this tries to use closed fd. */
 194                 suppress_logging = true;
 195                 suppress_lockcheck = true;
 196                 tdb_close(tdb);
 197                 suppress_logging = false;
 198                 suppress_lockcheck = false;
 199                 target++;
 200                 current = 0;
 201                 free_all();
 202                 goto reset;
 203         }
 204
 205         /* Put key for agent to fetch. */
 206         key.dsize = strlen(KEY_STRING);
 207         key.dptr = (void *)KEY_STRING;
 208         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 209                 return false;
 210
 211         /* This is the key we insert in transaction. */
 212         key.dsize--;
 213
 214         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 215         if (ret != SUCCESS)
 216                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 217
 218         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 219         if (ret != SUCCESS)
 220                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 221
 222         in_transaction = true;
 223         if (tdb_transaction_start(tdb) != 0)
 224                 return false;
 225
 226         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 227                 return false;
 228
 229         if (tdb_transaction_commit(tdb) != 0)
 230                 return false;
 231
 232         in_transaction = false;
 233
 234         /* We made it! */
 235         diag("Completed %u runs", current);
 236         tdb_close(tdb);
 237         ret = external_agent_operation(agent, CLOSE, "");
 238         if (ret != SUCCESS) {
 239                 diag("Step %u close failed = %s", current,
 240                      agent_return_name(ret));
 241                 return false;
 242         }
 243
 244         ok1(needed_recovery);
 245         ok1(locking_errors == 0);
 246         ok1(forget_locking() == 0);
 247         locking_errors = 0;
 248         return true;
 249 }
 250
 251 int main(int argc, char *argv[])
 252 {
 253         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 254         struct agent *agent;
 255         int i;
 256
 257         plan_tests(12);
 258         unlock_callback = maybe_die;
 259
 260         agent = prepare_external_agent();
 261         if (!agent)
 262                 err(1, "preparing agent");
 263
 264         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 265                 diag("Testing %s after death", operation_name(ops[i]));
 266                 ok1(test_death(ops[i], agent));
 267         }
 268
 269         free_external_agent(agent);
 270         return exit_status();
 271 }