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 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 "tdb2-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 <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.tdb"
 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, int flags)
 156 {
 157         struct tdb_context *tdb = NULL;
 158         TDB_DATA key;
 159         enum agent_return ret;
 160         int needed_recovery = 0;
 161
 162         current = target = 0;
 163 reset:
 164         unlink(TEST_DBNAME);
 165         tdb = tdb_open(TEST_DBNAME, flags|TDB_NOMMAP,
 166                        O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
 167         if (!tdb) {
 168                 diag("Failed opening TDB: %s", strerror(errno));
 169                 return false;
 170         }
 171
 172         if (setjmp(jmpbuf) != 0) {
 173                 /* We're partway through.  Simulate our death. */
 174                 close(tdb->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, KEY_STRING);
 188                 if (ret != SUCCESS) {
 189                         diag("Step %u op %s failed = %s", current,
 190                              operation_name(op),
 191                              agent_return_name(ret));
 192                         return false;
 193                 }
 194
 195                 ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
 196                 if (ret != FAILED) {
 197                         diag("Still needs recovery after step %u = %s",
 198                              current, agent_return_name(ret));
 199                         return false;
 200                 }
 201
 202                 ret = external_agent_operation(agent, CHECK, "");
 203                 if (ret != SUCCESS) {
 204                         diag("Step %u check failed = %s", current,
 205                              agent_return_name(ret));
 206                         return false;
 207                 }
 208
 209                 ret = external_agent_operation(agent, CLOSE, "");
 210                 if (ret != SUCCESS) {
 211                         diag("Step %u close failed = %s", current,
 212                              agent_return_name(ret));
 213                         return false;
 214                 }
 215
 216                 /* Suppress logging as this tries to use closed fd. */
 217                 suppress_logging = true;
 218                 suppress_lockcheck = true;
 219                 tdb_close(tdb);
 220                 suppress_logging = false;
 221                 suppress_lockcheck = false;
 222                 target++;
 223                 current = 0;
 224                 free_all();
 225                 goto reset;
 226         }
 227
 228         /* Put key for agent to fetch. */
 229         key = tdb_mkdata(KEY_STRING, strlen(KEY_STRING));
 230         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 231                 return false;
 232
 233         /* This is the key we insert in transaction. */
 234         key.dsize--;
 235
 236         ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
 237         if (ret != SUCCESS)
 238                 errx(1, "Agent failed to open: %s", agent_return_name(ret));
 239
 240         ret = external_agent_operation(agent, FETCH, KEY_STRING);
 241         if (ret != SUCCESS)
 242                 errx(1, "Agent failed find key: %s", agent_return_name(ret));
 243
 244         in_transaction = true;
 245         if (tdb_transaction_start(tdb) != 0)
 246                 return false;
 247
 248         if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
 249                 return false;
 250
 251         if (tdb_transaction_commit(tdb) != 0)
 252                 return false;
 253
 254         in_transaction = false;
 255
 256         /* We made it! */
 257         diag("Completed %u runs", current);
 258         tdb_close(tdb);
 259         ret = external_agent_operation(agent, CLOSE, "");
 260         if (ret != SUCCESS) {
 261                 diag("Step %u close failed = %s", current,
 262                      agent_return_name(ret));
 263                 return false;
 264         }
 265
 266         ok1(needed_recovery);
 267         ok1(locking_errors == 0);
 268         ok1(forget_locking() == 0);
 269         locking_errors = 0;
 270         return true;
 271 }
 272
 273 int main(int argc, char *argv[])
 274 {
 275         enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
 276         struct agent *agent;
 277         int i, flags;
 278
 279         plan_tests(24);
 280         unlock_callback = maybe_die;
 281
 282         external_agent_free = free_noleak;
 283         agent = prepare_external_agent();
 284         if (!agent)
 285                 err(1, "preparing agent");
 286
 287         for (flags = TDB_DEFAULT; flags <= TDB_VERSION1; flags += TDB_VERSION1) {
 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, flags));
 291                 }
 292         }
 293
 294         free_external_agent(agent);
 295         return exit_status();
 296 }