lib/ntdb/test/run-57-die-during-transaction.c

   1 #include "private.h"
   2 #include <unistd.h>
   3 #include "lock-tracking.h"
   4 #include "tap-interface.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 10
  19 static void *allocated[MAX_ALLOCATIONS];
  20 static unsigned max_alloc = 0;
  21
  22 static void *malloc_noleak(size_t len)
  23 {
  24         unsigned int i;
  25
  26         for (i = 0; i < MAX_ALLOCATIONS; i++)
  27                 if (!allocated[i]) {
  28                         allocated[i] = malloc(len);
  29                         if (i > max_alloc) {
  30                                 max_alloc = i;
  31                                 diag("max_alloc: %i", max_alloc);
  32                         }
  33                         return allocated[i];
  34                 }
  35         diag("Too many allocations!");
  36         abort();
  37 }
  38
  39 static void *realloc_noleak(void *p, size_t size)
  40 {
  41         unsigned int i;
  42
  43         for (i = 0; i < MAX_ALLOCATIONS; i++) {
  44                 if (allocated[i] == p) {
  45                         if (i > max_alloc) {
  46                                 max_alloc = i;
  47                                 diag("max_alloc: %i", max_alloc);
  48                         }
  49                         return allocated[i] = realloc(p, size);
  50                 }
  51         }
  52         diag("Untracked realloc!");
  53         abort();
  54 }
  55
  56 static void free_noleak(void *p)
  57 {
  58         unsigned int i;
  59
  60         /* We don't catch asprintf, so don't complain if we miss one. */
  61         for (i = 0; i < MAX_ALLOCATIONS; i++) {
  62                 if (allocated[i] == p) {
  63                         allocated[i] = NULL;
  64                         break;
  65                 }
  66         }
  67         free(p);
  68 }
  69
  70 static void free_all(void)
  71 {
  72         unsigned int i;
  73
  74         for (i = 0; i < MAX_ALLOCATIONS; i++) {
  75                 free(allocated[i]);
  76                 allocated[i] = NULL;
  77         }
  78 }
  79
  80 #define malloc malloc_noleak
  81 #define free free_noleak
  82 #define realloc realloc_noleak
  83
  84 #include "ntdb-source.h"
  85
  86 #undef malloc
  87 #undef free
  88 #undef realloc
  89 #undef write
  90 #undef pwrite
  91 #undef fcntl
  92 #undef ftruncate
  93
  94 #include <stdbool.h>
  95 #include <stdarg.h>
  96 #include <ccan/err/err.h>
  97 #include <setjmp.h>
  98 #include "external-agent.h"
  99 #include "logging.h"
 100
 101 static bool in_transaction;
 102 static int target, current;
 103 static jmp_buf jmpbuf;
 104 #define TEST_DBNAME "run-57-die-during-transaction.ntdb"
 105 #define KEY_STRING "helloworld"
 106
 107 static void maybe_die(int fd)
 108 {
 109         if (in_transaction && current++ == target) {
 110                 longjmp(jmpbuf, 1);
 111         }
 112 }
 113
 114 static ssize_t pwrite_check(int fd,
 115                             const void *buf, size_t count, off_t offset)
 116 {
 117         ssize_t ret;
 118
 119         maybe_die(fd);
 120
 121         ret = pwrite(fd, buf, count, offset);
 122         if (ret != count)
 123                 return ret;
 124
 125         maybe_die(fd);
 126         return ret;
 127 }
 128
 129 static ssize_t write_check(int fd, const void *buf, size_t count)
 130 {
 131         ssize_t ret;
 132
 133         maybe_die(fd);
 134
 135         ret = write(fd, buf, count);
 136         if (ret != count)
 137                 return ret;
 138
 139         maybe_die(fd);
 140         return ret;
 141 }
 142
 143 static int ftruncate_check(int fd, off_t length)
 144 {
 145         int ret;
 146
 147         maybe_die(fd);
 148
 149         ret = ftruncate(fd, length);
 150
 151         maybe_die(fd);
 152         return ret;
 153 }
 154
 155 static bool test_death(enum operation op, struct agent *agent)
 156 {
 157         struct ntdb_context *ntdb = NULL;
 158         NTDB_DATA key;
 159         enum agent_return ret;
 160         int needed_recovery = 0;
 161
 162         current = target = 0;
 163 reset:
 164         unlink(TEST_DBNAME);
 165         ntdb = ntdb_open(TEST_DBNAME, NTDB_NOMMAP,
 166                        O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
 167         if (!ntdb) {
 168                 diag("Failed opening NTDB: %s", strerror(errno));
 169                 return false;
 170         }
 171
 172         if (setjmp(jmpbuf) != 0) {
 173                 /* We're partway through.  Simulate our death. */
 174                 close(ntdb->file->fd);
 175                 forget_locking();
 176                 in_transaction = false;
 177
 178                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 179                 if (ret == SUCCESS)
 180                         needed_recovery++;
 181                 else if (ret != FAILED) {
 182                         diag("Step %u agent NEEDS_RECOVERY = %s", current,
 183                              agent_return_name(ret));
 184                         return false;
 185                 }
 186
 187                 ret = external_agent_operation(agent, op,
 188                                                KEY_STRING "=" KEY_STRING);
 189                 if (ret != SUCCESS) {
 190                         diag("Step %u op %s failed = %s", current,
 191                              operation_name(op),
 192                              agent_return_name(ret));
 193                         return false;
 194                 }
 195
 196                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 197                 if (ret != FAILED) {
 198                         diag("Still needs recovery after step %u = %s",
 199                              current, agent_return_name(ret));
 200                         return false;
 201                 }
 202
 203                 ret = external_agent_operation(agent, CHECK, "");
 204                 if (ret != SUCCESS) {
 205                         diag("Step %u check failed = %s", current,
 206                              agent_return_name(ret));
 207                         return false;
 208                 }
 209
 210                 ret = external_agent_operation(agent, CLOSE, "");
 211                 if (ret != SUCCESS) {
 212                         diag("Step %u close failed = %s", current,
 213                              agent_return_name(ret));
 214                         return false;
 215                 }
 216
 217                 /* Suppress logging as this tries to use closed fd. */
 218                 suppress_logging = true;
 219                 suppress_lockcheck = true;
 220                 ntdb_close(ntdb);
 221                 suppress_logging = false;
 222                 suppress_lockcheck = false;
 223                 target++;
 224                 current = 0;
 225                 free_all();
 226                 goto reset;
 227         }
 228
 229         /* Put key for agent to fetch. */
 230         key = ntdb_mkdata(KEY_STRING, strlen(KEY_STRING));
 231         if (ntdb_store(ntdb, key, key, NTDB_INSERT) != 0)
 232                 return false;
 233
 234         /* This is the key we insert in transaction. */
 235         key.dsize--;
 236
 237         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 238         if (ret != SUCCESS)
 239                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 240
 241         ret = external_agent_operation(agent, FETCH, KEY_STRING "=" KEY_STRING);
 242         if (ret != SUCCESS)
 243                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 244
 245         in_transaction = true;
 246         if (ntdb_transaction_start(ntdb) != 0)
 247                 return false;
 248
 249         if (ntdb_store(ntdb, key, key, NTDB_INSERT) != 0)
 250                 return false;
 251
 252         if (ntdb_transaction_commit(ntdb) != 0)
 253                 return false;
 254
 255         in_transaction = false;
 256
 257         /* We made it! */
 258         diag("Completed %u runs", current);
 259         ntdb_close(ntdb);
 260         ret = external_agent_operation(agent, CLOSE, "");
 261         if (ret != SUCCESS) {
 262                 diag("Step %u close failed = %s", current,
 263                      agent_return_name(ret));
 264                 return false;
 265         }
 266
 267         ok1(needed_recovery);
 268         ok1(locking_errors == 0);
 269         ok1(forget_locking() == 0);
 270         locking_errors = 0;
 271         return true;
 272 }
 273
 274 int main(int argc, char *argv[])
 275 {
 276         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 277         struct agent *agent;
 278         int i;
 279
 280         plan_tests(12);
 281         unlock_callback = maybe_die;
 282
 283         external_agent_free = free_noleak;
 284         agent = prepare_external_agent();
 285         if (!agent)
 286                 err(1, "preparing agent");
 287
 288         for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
 289                 diag("Testing %s after death", operation_name(ops[i]));
 290                 ok1(test_death(ops[i], agent));
 291         }
 292
 293         free_external_agent(agent);
 294         return exit_status();
 295 }