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-rw-r--r--lib/tdb2/test/run-tdb1-open-during-transaction.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/lib/tdb2/test/run-tdb1-open-during-transaction.c b/lib/tdb2/test/run-tdb1-open-during-transaction.c
new file mode 100644
index 0000000000..7b22320a73
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-open-during-transaction.c
@@ -0,0 +1,176 @@
+#include "config.h"
+#include "tdb1-lock-tracking.h"
+#include <unistd.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_lockcheck1
+#define ftruncate ftruncate_check
+
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <err.h>
+#include "tdb1-external-agent.h"
+#include "tdb1-logging.h"
+
+static struct agent *agent;
+static bool opened;
+static int errors = 0;
+static bool clear_if_first;
+#define TEST_DBNAME "run-open-during-transaction.tdb"
+
+#undef write
+#undef pwrite
+#undef fcntl
+#undef ftruncate
+
+static bool is_same(const char *snapshot, const char *latest, off_t len)
+{
+ unsigned i;
+
+ for (i = 0; i < len; i++) {
+ if (snapshot[i] != latest[i])
+ return false;
+ }
+ return true;
+}
+
+static bool compare_file(int fd, const char *snapshot, off_t snapshot_len)
+{
+ char *contents;
+ bool same;
+
+ /* over-length read serves as length check. */
+ contents = malloc(snapshot_len+1);
+ same = pread(fd, contents, snapshot_len+1, 0) == snapshot_len
+ && is_same(snapshot, contents, snapshot_len);
+ free(contents);
+ return same;
+}
+
+static void check_file_intact(int fd)
+{
+ enum agent_return ret;
+ struct stat st;
+ char *contents;
+
+ fstat(fd, &st);
+ contents = malloc(st.st_size);
+ if (pread(fd, contents, st.st_size, 0) != st.st_size) {
+ diag("Read fail");
+ errors++;
+ return;
+ }
+
+ /* Ask agent to open file. */
+ ret = external_agent_operation1(agent, clear_if_first ?
+ OPEN_WITH_CLEAR_IF_FIRST :
+ OPEN,
+ TEST_DBNAME);
+
+ /* It's OK to open it, but it must not have changed! */
+ if (!compare_file(fd, contents, st.st_size)) {
+ diag("Agent changed file after opening %s",
+ agent_return_name1(ret));
+ errors++;
+ }
+
+ if (ret == SUCCESS) {
+ ret = external_agent_operation1(agent, CLOSE, NULL);
+ if (ret != SUCCESS) {
+ diag("Agent failed to close tdb: %s",
+ agent_return_name1(ret));
+ errors++;
+ }
+ } else if (ret != WOULD_HAVE_BLOCKED) {
+ diag("Agent opening file gave %s",
+ agent_return_name1(ret));
+ errors++;
+ }
+
+ free(contents);
+}
+
+static void after_unlock(int fd)
+{
+ if (opened)
+ check_file_intact(fd);
+}
+
+static ssize_t pwrite_check(int fd,
+ const void *buf, size_t count, off_t offset)
+{
+ if (opened)
+ check_file_intact(fd);
+
+ return pwrite(fd, buf, count, offset);
+}
+
+static ssize_t write_check(int fd, const void *buf, size_t count)
+{
+ if (opened)
+ check_file_intact(fd);
+
+ return write(fd, buf, count);
+}
+
+static int ftruncate_check(int fd, off_t length)
+{
+ if (opened)
+ check_file_intact(fd);
+
+ return ftruncate(fd, length);
+
+}
+
+int main(int argc, char *argv[])
+{
+ const int flags[] = { TDB1_DEFAULT,
+ TDB1_CLEAR_IF_FIRST,
+ TDB1_NOMMAP,
+ TDB1_CLEAR_IF_FIRST | TDB1_NOMMAP };
+ int i;
+ struct tdb1_context *tdb;
+ TDB1_DATA key, data;
+
+ plan_tests(20);
+ agent = prepare_external_agent1();
+ if (!agent)
+ err(1, "preparing agent");
+
+ unlock_callback1 = after_unlock;
+ for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) {
+ clear_if_first = (flags[i] & TDB1_CLEAR_IF_FIRST);
+ diag("Test with %s and %s\n",
+ clear_if_first ? "CLEAR" : "DEFAULT",
+ (flags[i] & TDB1_NOMMAP) ? "no mmap" : "mmap");
+ unlink(TEST_DBNAME);
+ tdb = tdb1_open_ex(TEST_DBNAME, 1024, flags[i],
+ O_CREAT|O_TRUNC|O_RDWR, 0600,
+ &taplogctx, NULL);
+ ok1(tdb);
+
+ opened = true;
+ ok1(tdb1_transaction_start(tdb) == 0);
+ key.dsize = strlen("hi");
+ key.dptr = (void *)"hi";
+ data.dptr = (void *)"world";
+ data.dsize = strlen("world");
+
+ ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0);
+ ok1(tdb1_transaction_commit(tdb) == 0);
+ ok(!errors, "We had %u open errors", errors);
+
+ opened = false;
+ tdb1_close(tdb);
+ }
+
+ return exit_status();
+}