tdb2: transaction support

[ccan] / ccan / tdb2 / test / run-57-die-during-transaction.c

diff --git a/ccan/tdb2/test/run-57-die-during-transaction.c b/ccan/tdb2/test/run-57-die-during-transaction.c
new file mode 100644 (file)
index 0000000..4711e50
--- /dev/null
+++ b/ccan/tdb2/test/run-57-die-during-transaction.c
@@ -0,0 +1,221 @@
+#define _XOPEN_SOURCE 500
+#include <unistd.h>
+#include "lock-tracking.h"
+static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
+static ssize_t write_check(int fd, const void *buf, size_t count);
+static int ftruncate_check(int fd, off_t length);
+
+#define pwrite pwrite_check
+#define write write_check
+#define fcntl fcntl_with_lockcheck
+#define ftruncate ftruncate_check
+
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/hash.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tdb2/transaction.c>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <err.h>
+#include <setjmp.h>
+#include "external-agent.h"
+#include "logging.h"
+
+#undef write
+#undef pwrite
+#undef fcntl
+#undef ftruncate
+
+static bool in_transaction;
+static int target, current;
+static jmp_buf jmpbuf;
+#define TEST_DBNAME "run-57-die-during-transaction.tdb"
+#define KEY_STRING "helloworld"
+
+static void maybe_die(int fd)
+{
+       if (in_transaction && current++ == target) {
+               longjmp(jmpbuf, 1);
+       }
+}
+
+static ssize_t pwrite_check(int fd,
+                           const void *buf, size_t count, off_t offset)
+{
+       ssize_t ret;
+
+       maybe_die(fd);
+
+       ret = pwrite(fd, buf, count, offset);
+       if (ret != count)
+               return ret;
+
+       maybe_die(fd);
+       return ret;
+}
+
+static ssize_t write_check(int fd, const void *buf, size_t count)
+{
+       ssize_t ret;
+
+       maybe_die(fd);
+
+       ret = write(fd, buf, count);
+       if (ret != count)
+               return ret;
+
+       maybe_die(fd);
+       return ret;
+}
+
+static int ftruncate_check(int fd, off_t length)
+{
+       int ret;
+
+       maybe_die(fd);
+
+       ret = ftruncate(fd, length);
+
+       maybe_die(fd);
+       return ret;
+}
+
+static bool test_death(enum operation op, struct agent *agent)
+{
+       struct tdb_context *tdb = NULL;
+       TDB_DATA key;
+       enum agent_return ret;
+       int needed_recovery = 0;
+
+       current = target = 0;
+reset:
+       unlink(TEST_DBNAME);
+       tdb = tdb_open(TEST_DBNAME, TDB_NOMMAP,
+                      O_CREAT|O_TRUNC|O_RDWR, 0600, &tap_log_attr);
+
+       if (setjmp(jmpbuf) != 0) {
+               /* We're partway through.  Simulate our death. */
+               close(tdb->fd);
+               forget_locking();
+               in_transaction = false;
+
+               ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
+               if (ret == SUCCESS)
+                       needed_recovery++;
+               else if (ret != FAILED) {
+                       diag("Step %u agent NEEDS_RECOVERY = %s", current,
+                            agent_return_name(ret));
+                       return false;
+               }
+
+               ret = external_agent_operation(agent, op, KEY_STRING);
+               if (ret != SUCCESS) {
+                       diag("Step %u op %s failed = %s", current,
+                            operation_name(op),
+                            agent_return_name(ret));
+                       return false;
+               }
+
+               ret = external_agent_operation(agent, NEEDS_RECOVERY, "");
+               if (ret != FAILED) {
+                       diag("Still needs recovery after step %u = %s",
+                            current, agent_return_name(ret));
+                       return false;
+               }
+
+               ret = external_agent_operation(agent, CHECK, "");
+               if (ret != SUCCESS) {
+                       diag("Step %u check failed = %s", current,
+                            agent_return_name(ret));
+                       return false;
+               }
+
+               ret = external_agent_operation(agent, CLOSE, "");
+               if (ret != SUCCESS) {
+                       diag("Step %u close failed = %s", current,
+                            agent_return_name(ret));
+                       return false;
+               }
+
+               /* Suppress logging as this tries to use closed fd. */
+               suppress_logging = true;
+               suppress_lockcheck = true;
+               tdb_close(tdb);
+               suppress_logging = false;
+               suppress_lockcheck = false;
+               target++;
+               current = 0;
+               goto reset;
+       }
+
+       /* Put key for agent to fetch. */
+       key.dsize = strlen(KEY_STRING);
+       key.dptr = (void *)KEY_STRING;
+       if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
+               return false;
+
+       /* This is the key we insert in transaction. */
+       key.dsize--;
+
+       ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
+       if (ret != SUCCESS)
+               errx(1, "Agent failed to open: %s", agent_return_name(ret));
+
+       ret = external_agent_operation(agent, FETCH, KEY_STRING);
+       if (ret != SUCCESS)
+               errx(1, "Agent failed find key: %s", agent_return_name(ret));
+
+       in_transaction = true;
+       if (tdb_transaction_start(tdb) != 0)
+               return false;
+
+       if (tdb_store(tdb, key, key, TDB_INSERT) != 0)
+               return false;
+
+       if (tdb_transaction_commit(tdb) != 0)
+               return false;
+
+       in_transaction = false;
+
+       /* We made it! */
+       diag("Completed %u runs", current);
+       tdb_close(tdb);
+       ret = external_agent_operation(agent, CLOSE, "");
+       if (ret != SUCCESS) {
+               diag("Step %u close failed = %s", current,
+                    agent_return_name(ret));
+               return false;
+       }
+
+       ok1(needed_recovery);
+       ok1(locking_errors == 0);
+       ok1(forget_locking() == 0);
+       locking_errors = 0;
+       return true;
+}
+
+int main(int argc, char *argv[])
+{
+       enum operation ops[] = { FETCH, STORE, TRANSACTION_START };
+       struct agent *agent;
+       int i;
+
+       plan_tests(12);
+       unlock_callback = maybe_die;
+
+       agent = prepare_external_agent();
+       if (!agent)
+               err(1, "preparing agent");
+
+       for (i = 0; i < sizeof(ops)/sizeof(ops[0]); i++) {
+               diag("Testing %s after death", operation_name(ops[i]));
+               ok1(test_death(ops[i], agent));
+       }
+
+       return exit_status();
+}