git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/run-83-openhook.c

   1 #include <ccan/tdb2/tdb.c>
   2 #include <ccan/tdb2/open.c>
   3 #include <ccan/tdb2/free.c>
   4 #include <ccan/tdb2/lock.c>
   5 #include <ccan/tdb2/io.c>
   6 #include <ccan/tdb2/hash.c>
   7 #include <ccan/tdb2/check.c>
   8 #include <ccan/tdb2/transaction.c>
   9 #include <ccan/tap/tap.h>
  10 #include <stdlib.h>
  11 #include <stdbool.h>
  12 #include <stdarg.h>
  13 #include <err.h>
  14 #include "external-agent.h"
  15 #include "logging.h"
  16
  17 static enum TDB_ERROR clear_if_first(int fd, void *arg)
  18 {
  19 /* We hold a lock offset 63 always, so we can tell if anyone is holding it. */
  20         struct flock fl;
  21
  22         if (arg != clear_if_first)
  23                 return TDB_ERR_CORRUPT;
  24
  25         fl.l_type = F_WRLCK;
  26         fl.l_whence = SEEK_SET;
  27         fl.l_start = 63;
  28         fl.l_len = 1;
  29
  30         if (fcntl(fd, F_SETLK, &fl) == 0) {
  31                 /* We must be first ones to open it! */
  32                 diag("truncating file!");
  33                 if (ftruncate(fd, 0) != 0) {
  34                         return TDB_ERR_IO;
  35                 }
  36         }
  37         fl.l_type = F_RDLCK;
  38         if (fcntl(fd, F_SETLKW, &fl) != 0) {
  39                 return TDB_ERR_IO;
  40         }
  41         return TDB_SUCCESS;
  42 }
  43
  44 int main(int argc, char *argv[])
  45 {
  46         unsigned int i;
  47         struct tdb_context *tdb;
  48         struct agent *agent;
  49         union tdb_attribute cif;
  50         struct tdb_data key = tdb_mkdata("key", 3);
  51         int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
  52                         TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT };
  53
  54         cif.openhook.base.attr = TDB_ATTRIBUTE_OPENHOOK;
  55         cif.openhook.base.next = &tap_log_attr;
  56         cif.openhook.fn = clear_if_first;
  57         cif.openhook.data = clear_if_first;
  58
  59         agent = prepare_external_agent();
  60         plan_tests(sizeof(flags) / sizeof(flags[0]) * 13);
  61         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  62                 /* Create it */
  63                 tdb = tdb_open("run-83-openhook.tdb", flags[i],
  64                                O_RDWR|O_CREAT|O_TRUNC, 0600, NULL);
  65                 ok1(tdb);
  66                 ok1(tdb_store(tdb, key, key, TDB_REPLACE) == 0);
  67                 tdb_close(tdb);
  68
  69                 /* Now, open with CIF, should clear it. */
  70                 tdb = tdb_open("run-83-openhook.tdb", flags[i],
  71                                O_RDWR, 0, &cif);
  72                 ok1(tdb);
  73                 ok1(!tdb_exists(tdb, key));
  74                 ok1(tdb_store(tdb, key, key, TDB_REPLACE) == 0);
  75
  76                 /* Agent should not clear it, since it's still open. */
  77                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  78                                              "run-83-openhook.tdb") == SUCCESS);
  79                 ok1(external_agent_operation(agent, FETCH, "key") == SUCCESS);
  80                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  81
  82                 /* Still exists for us too. */
  83                 ok1(tdb_exists(tdb, key));
  84
  85                 /* Close it, now agent should clear it. */
  86                 tdb_close(tdb);
  87
  88                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  89                                              "run-83-openhook.tdb") == SUCCESS);
  90                 ok1(external_agent_operation(agent, FETCH, "key") == FAILED);
  91                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  92
  93                 ok1(tap_log_messages == 0);
  94         }
  95
  96         free_external_agent(agent);
  97         return exit_status();
  98 }
  99