tdb2: add lib/tdb2 (from CCAN init-1161-g661d41f)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 263 insertions, 0 deletions

diff --git a/lib/tdb2/test/run-82-lockattr.c b/lib/tdb2/test/run-82-lockattr.c
new file mode 100644
index 00000000000..bfc2653222f
--- /dev/null
+++ b/lib/tdb2/test/run-82-lockattr.c
@@ -0,0 +1,263 @@
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/open.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/tdb2/traverse.c>
+#include <ccan/tap/tap.h>
+#include "logging.h"
+
+static int mylock(int fd, int rw, off_t off, off_t len, bool waitflag,
+		  void *_err)
+{
+	int *lock_err = _err;
+	struct flock fl;
+	int ret;
+
+	if (*lock_err) {
+		errno = *lock_err;
+		return -1;
+	}
+
+	do {
+		fl.l_type = rw;
+		fl.l_whence = SEEK_SET;
+		fl.l_start = off;
+		fl.l_len = len;
+
+		if (waitflag)
+			ret = fcntl(fd, F_SETLKW, &fl);
+		else
+			ret = fcntl(fd, F_SETLK, &fl);
+	} while (ret != 0 && errno == EINTR);
+
+	return ret;
+}
+
+static int myunlock(int fd, int rw, off_t off, off_t len, void *_err)
+{
+	int *lock_err = _err;
+	struct flock fl;
+	int ret;
+
+	if (*lock_err) {
+		errno = *lock_err;
+		return -1;
+	}
+
+	do {
+		fl.l_type = F_UNLCK;
+		fl.l_whence = SEEK_SET;
+		fl.l_start = off;
+		fl.l_len = len;
+
+		ret = fcntl(fd, F_SETLKW, &fl);
+	} while (ret != 0 && errno == EINTR);
+
+	return ret;
+}
+
+static int trav_err;
+static int trav(struct tdb_context *tdb, TDB_DATA k, TDB_DATA d, int *err)
+{
+	*err = trav_err;
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	unsigned int i;
+	struct tdb_context *tdb;
+	int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
+			TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT };
+	union tdb_attribute lock_attr;
+	struct tdb_data key = tdb_mkdata("key", 3);
+	struct tdb_data data = tdb_mkdata("data", 4);
+	int lock_err;
+
+	lock_attr.base.attr = TDB_ATTRIBUTE_FLOCK;
+	lock_attr.base.next = &tap_log_attr;
+	lock_attr.flock.lock = mylock;
+	lock_attr.flock.unlock = myunlock;
+	lock_attr.flock.data = &lock_err;
+
+	plan_tests(sizeof(flags) / sizeof(flags[0]) * 80);
+
+	for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+		struct tdb_data d;
+
+		/* Nonblocking open; expect no error message. */
+		lock_err = EAGAIN;
+		tdb = tdb_open("run-82-lockattr.tdb", flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600, &lock_attr);
+		ok(errno == lock_err, "Errno is %u", errno);
+		ok1(!tdb);
+		ok1(tap_log_messages == 0);
+
+		lock_err = EINTR;
+		tdb = tdb_open("run-82-lockattr.tdb", flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600, &lock_attr);
+		ok(errno == lock_err, "Errno is %u", errno);
+		ok1(!tdb);
+		ok1(tap_log_messages == 0);
+
+		/* Forced fail open. */
+		lock_err = ENOMEM;
+		tdb = tdb_open("run-82-lockattr.tdb", flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600, &lock_attr);
+		ok1(errno == lock_err);
+		ok1(!tdb);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		lock_err = 0;
+		tdb = tdb_open("run-82-lockattr.tdb", flags[i],
+			       O_RDWR|O_CREAT|O_TRUNC, 0600, &lock_attr);
+		if (!ok1(tdb))
+			continue;
+		ok1(tap_log_messages == 0);
+
+		/* Nonblocking store. */
+		lock_err = EAGAIN;
+		ok1(tdb_store(tdb, key, data, TDB_REPLACE) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_store(tdb, key, data, TDB_REPLACE) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_store(tdb, key, data, TDB_REPLACE) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		/* Nonblocking fetch. */
+		lock_err = EAGAIN;
+		ok1(!tdb_exists(tdb, key));
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(!tdb_exists(tdb, key));
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(!tdb_exists(tdb, key));
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		lock_err = EAGAIN;
+		ok1(tdb_fetch(tdb, key, &d) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_fetch(tdb, key, &d) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_fetch(tdb, key, &d) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		/* Nonblocking delete. */
+		lock_err = EAGAIN;
+		ok1(tdb_delete(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_delete(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_delete(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		/* Nonblocking locks. */
+		lock_err = EAGAIN;
+		ok1(tdb_chainlock(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_chainlock(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_chainlock(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		lock_err = EAGAIN;
+		ok1(tdb_chainlock_read(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_chainlock_read(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_chainlock_read(tdb, key) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		lock_err = EAGAIN;
+		ok1(tdb_lockall(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_lockall(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_lockall(tdb) == TDB_ERR_LOCK);
+		/* This actually does divide and conquer. */
+		ok1(tap_log_messages > 0);
+		tap_log_messages = 0;
+
+		lock_err = EAGAIN;
+		ok1(tdb_lockall_read(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_lockall_read(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_lockall_read(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages > 0);
+		tap_log_messages = 0;
+
+		/* Nonblocking traverse; go nonblock partway through. */
+		lock_err = 0;
+		ok1(tdb_store(tdb, key, data, TDB_REPLACE) == 0);
+		trav_err = EAGAIN;
+		ok1(tdb_traverse(tdb, trav, &lock_err) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		trav_err = EINTR;
+		lock_err = 0;
+		ok1(tdb_traverse(tdb, trav, &lock_err) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		trav_err = ENOMEM;
+		lock_err = 0;
+		ok1(tdb_traverse(tdb, trav, &lock_err) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		/* Nonblocking transactions. */
+		lock_err = EAGAIN;
+		ok1(tdb_transaction_start(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = EINTR;
+		ok1(tdb_transaction_start(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+		lock_err = ENOMEM;
+		ok1(tdb_transaction_start(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 1);
+		tap_log_messages = 0;
+
+		/* Nonblocking transaction prepare. */
+		lock_err = 0;
+		ok1(tdb_transaction_start(tdb) == 0);
+		ok1(tdb_delete(tdb, key) == 0);
+
+		lock_err = EAGAIN;
+		ok1(tdb_transaction_prepare_commit(tdb) == TDB_ERR_LOCK);
+		ok1(tap_log_messages == 0);
+
+		lock_err = 0;
+		ok1(tdb_transaction_prepare_commit(tdb) == 0);
+		ok1(tdb_transaction_commit(tdb) == 0);
+
+		/* And the transaction was committed, right? */
+		ok1(!tdb_exists(tdb, key));
+		tdb_close(tdb);
+		ok1(tap_log_messages == 0);
+	}
+	return exit_status();
+}