lib/tdb2/test/run-remap-in-read_traverse.c

   1 /* We had a bug where we marked the tdb read-only for a tdb_traverse_read.
   2  * If we then expanded the tdb, we would remap read-only, and later SEGV. */
   3 #include <ccan/tdb2/tdb.c>
   4 #include <ccan/tdb2/open.c>
   5 #include <ccan/tdb2/free.c>
   6 #include <ccan/tdb2/lock.c>
   7 #include <ccan/tdb2/io.c>
   8 #include <ccan/tdb2/hash.c>
   9 #include <ccan/tdb2/check.c>
  10 #include <ccan/tdb2/traverse.c>
  11 #include <ccan/tdb2/transaction.c>
  12 #include <ccan/tap/tap.h>
  13 #include "external-agent.h"
  14 #include "logging.h"
  15
  16 static bool file_larger(int fd, tdb_len_t size)
  17 {
  18         struct stat st;
  19
  20         fstat(fd, &st);
  21         return st.st_size != size;
  22 }
  23
  24 static unsigned add_records_to_grow(struct agent *agent, int fd, tdb_len_t size)
  25 {
  26         unsigned int i;
  27
  28         for (i = 0; !file_larger(fd, size); i++) {
  29                 char data[20];
  30                 sprintf(data, "%i", i);
  31                 if (external_agent_operation(agent, STORE, data) != SUCCESS)
  32                         return 0;
  33         }
  34         diag("Added %u records to grow file", i);
  35         return i;
  36 }
  37
  38 int main(int argc, char *argv[])
  39 {
  40         unsigned int i;
  41         struct agent *agent;
  42         struct tdb_context *tdb;
  43         struct tdb_data d = tdb_mkdata("hello", 5);
  44         const char filename[] = "run-remap-in-read_traverse.tdb";
  45
  46         plan_tests(4);
  47
  48         agent = prepare_external_agent();
  49
  50         tdb = tdb_open(filename, TDB_DEFAULT,
  51                        O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
  52
  53         ok1(external_agent_operation(agent, OPEN, filename) == SUCCESS);
  54         i = add_records_to_grow(agent, tdb->file->fd, tdb->file->map_size);
  55
  56         /* Do a traverse. */
  57         ok1(tdb_traverse(tdb, NULL, NULL) == i);
  58
  59         /* Now store something! */
  60         ok1(tdb_store(tdb, d, d, TDB_INSERT) == 0);
  61         ok1(tap_log_messages == 0);
  62         tdb_close(tdb);
  63         free_external_agent(agent);
  64         return exit_status();
  65 }