lib/tdb/test/run-mutex1.c

   1 #include "../common/tdb_private.h"
   2 #include "../common/io.c"
   3 #include "../common/tdb.c"
   4 #include "../common/lock.c"
   5 #include "../common/freelist.c"
   6 #include "../common/traverse.c"
   7 #include "../common/transaction.c"
   8 #include "../common/error.c"
   9 #include "../common/open.c"
  10 #include "../common/check.c"
  11 #include "../common/hash.c"
  12 #include "../common/mutex.c"
  13 #include "tap-interface.h"
  14 #include <stdlib.h>
  15 #include <sys/types.h>
  16 #include <sys/wait.h>
  17 #include <stdarg.h>
  18
  19 static TDB_DATA key, data;
  20
  21 static void log_fn(struct tdb_context *tdb, enum tdb_debug_level level,
  22                    const char *fmt, ...)
  23 {
  24         va_list ap;
  25         va_start(ap, fmt);
  26         vfprintf(stderr, fmt, ap);
  27         va_end(ap);
  28 }
  29
  30 static int do_child(int tdb_flags, int to, int from)
  31 {
  32         struct tdb_context *tdb;
  33         unsigned int log_count;
  34         struct tdb_logging_context log_ctx = { log_fn, &log_count };
  35         int ret;
  36         char c = 0;
  37
  38         tdb = tdb_open_ex("mutex1.tdb", 0, tdb_flags,
  39                           O_RDWR|O_CREAT, 0755, &log_ctx, NULL);
  40         ok(tdb, "tdb_open_ex should succeed");
  41
  42         ret = tdb_chainlock(tdb, key);
  43         ok(ret == 0, "tdb_chainlock should succeed");
  44
  45         write(to, &c, sizeof(c));
  46         read(from, &c, sizeof(c));
  47
  48         ret = tdb_chainunlock(tdb, key);
  49         ok(ret == 0, "tdb_chainunlock should succeed");
  50
  51         write(to, &c, sizeof(c));
  52         read(from, &c, sizeof(c));
  53
  54         ret = tdb_allrecord_lock(tdb, F_WRLCK, TDB_LOCK_WAIT, false);
  55         ok(ret == 0, "tdb_allrecord_lock should succeed");
  56
  57         write(to, &c, sizeof(c));
  58         read(from, &c, sizeof(c));
  59
  60         ret = tdb_allrecord_unlock(tdb, F_WRLCK, false);
  61         ok(ret == 0, "tdb_allrecord_lock should succeed");
  62
  63         return 0;
  64 }
  65
  66 /* The code should barf on TDBs created with rwlocks. */
  67 int main(int argc, char *argv[])
  68 {
  69         struct tdb_context *tdb;
  70         unsigned int log_count;
  71         struct tdb_logging_context log_ctx = { log_fn, &log_count };
  72         int ret, status;
  73         pid_t child, wait_ret;
  74         int fromchild[2];
  75         int tochild[2];
  76         char c;
  77         int tdb_flags;
  78         bool runtime_support;
  79
  80         runtime_support = tdb_runtime_check_for_robust_mutexes();
  81
  82         if (!runtime_support) {
  83                 skip(1, "No robust mutex support");
  84                 return exit_status();
  85         }
  86
  87         key.dsize = strlen("hi");
  88         key.dptr = discard_const_p(uint8_t, "hi");
  89         data.dsize = strlen("world");
  90         data.dptr = discard_const_p(uint8_t, "world");
  91
  92         pipe(fromchild);
  93         pipe(tochild);
  94
  95         tdb_flags = TDB_INCOMPATIBLE_HASH|
  96                 TDB_MUTEX_LOCKING|
  97                 TDB_CLEAR_IF_FIRST;
  98
  99         child = fork();
 100         if (child == 0) {
 101                 close(fromchild[0]);
 102                 close(tochild[1]);
 103                 return do_child(tdb_flags, fromchild[1], tochild[0]);
 104         }
 105         close(fromchild[1]);
 106         close(tochild[0]);
 107
 108         read(fromchild[0], &c, sizeof(c));
 109
 110         tdb = tdb_open_ex("mutex1.tdb", 0, tdb_flags,
 111                           O_RDWR|O_CREAT, 0755, &log_ctx, NULL);
 112         ok(tdb, "tdb_open_ex should succeed");
 113
 114         write(tochild[1], &c, sizeof(c));
 115         read(fromchild[0], &c, sizeof(c));
 116
 117         ret = tdb_allrecord_lock(tdb, F_WRLCK, TDB_LOCK_WAIT, false);
 118         ok(ret == 0, "tdb_allrecord_lock should succeed");
 119
 120         ret = tdb_store(tdb, key, data, 0);
 121         ok(ret == 0, "tdb_store should succeed");
 122
 123         ret = tdb_allrecord_unlock(tdb, F_WRLCK, false);
 124         ok(ret == 0, "tdb_allrecord_unlock should succeed");
 125
 126         write(tochild[1], &c, sizeof(c));
 127         read(fromchild[0], &c, sizeof(c));
 128         write(tochild[1], &c, sizeof(c));
 129
 130         ret = tdb_delete(tdb, key);
 131         ok(ret == 0, "tdb_delete should succeed");
 132
 133         wait_ret = wait(&status);
 134         ok(wait_ret == child, "child should have exited correctly");
 135
 136         diag("done");
 137         return exit_status();
 138 }