1 files changed, 136 insertions, 0 deletions
diff --git a/tests/zfs-tests/cmd/badsend/badsend.c b/tests/zfs-tests/cmd/badsend/badsend.c
new file mode 100644
index 0000000000000..af17bc7255b4a
--- /dev/null
+++ b/tests/zfs-tests/cmd/badsend/badsend.c
@@ -0,0 +1,136 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Portions Copyright 2020 iXsystems, Inc.
+ */
+
+/*
+ * Test some invalid send operations with libzfs/libzfs_core.
+ *
+ * Specifying the to and from snaps in the wrong order should return EXDEV.
+ * We are checking that the early return doesn't accidentally leave any
+ * references held, so this test is designed to trigger a panic when asserts
+ * are verified with the bug present.
+ */
+
+#include <libzfs.h>
+#include <libzfs_core.h>
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sysexits.h>
+#include <err.h>
+
+static void
+usage(const char *name)
+{
+	fprintf(stderr, "usage: %s snap0 snap1\n", name);
+	exit(EX_USAGE);
+}
+
+int
+main(int argc, char const * const argv[])
+{
+	sendflags_t flags = { 0 };
+	libzfs_handle_t *zhdl;
+	zfs_handle_t *zhp;
+	const char *fromfull, *tofull, *fsname, *fromsnap, *tosnap, *p;
+	uint64_t size;
+	int fd, error;
+
+	if (argc != 3)
+		usage(argv[0]);
+
+	fromfull = argv[1];
+	tofull = argv[2];
+
+	p = strchr(fromfull, '@');
+	if (p == NULL)
+		usage(argv[0]);
+	fromsnap = p + 1;
+
+	p = strchr(tofull, '@');
+	if (p == NULL)
+		usage(argv[0]);
+	tosnap = p + 1;
+
+	fsname = strndup(tofull, p - tofull);
+	if (strncmp(fsname, fromfull, p - tofull) != 0)
+		usage(argv[0]);
+
+	fd = open("/dev/null", O_WRONLY);
+	if (fd == -1)
+		err(EX_OSERR, "open(\"/dev/null\", O_WRONLY)");
+
+	zhdl = libzfs_init();
+	if (zhdl == NULL)
+		errx(EX_OSERR, "libzfs_init(): %s", libzfs_error_init(errno));
+
+	zhp = zfs_open(zhdl, fsname, ZFS_TYPE_FILESYSTEM);
+	if (zhp == NULL)
+		err(EX_OSERR, "zfs_open(\"%s\")", fsname);
+
+	/*
+	 * Exercise EXDEV in dmu_send_obj.  The error gets translated to
+	 * EZFS_CROSSTARGET in libzfs.
+	 */
+	error = zfs_send(zhp, tosnap, fromsnap, &flags, fd, NULL, NULL, NULL);
+	if (error == 0 || libzfs_errno(zhdl) != EZFS_CROSSTARGET)
+		errx(EX_OSERR, "zfs_send(\"%s\", \"%s\") should have failed "
+		    "with EZFS_CROSSTARGET, not %d",
+		    tofull, fromfull, libzfs_errno(zhdl));
+	printf("zfs_send(\"%s\", \"%s\"): %s\n",
+	    tofull, fromfull, libzfs_error_description(zhdl));
+
+	zfs_close(zhp);
+
+	/*
+	 * Exercise EXDEV in dmu_send.
+	 */
+	error = lzc_send_resume_redacted(fromfull, tofull, fd, 0, 0, 0, NULL);
+	if (error != EXDEV)
+		errx(EX_OSERR, "lzc_send_resume_redacted(\"%s\", \"%s\")"
+		    " should have failed with EXDEV, not %d",
+		    fromfull, tofull, error);
+	printf("lzc_send_resume_redacted(\"%s\", \"%s\"): %s\n",
+	    fromfull, tofull, strerror(error));
+
+	/*
+	 * Exercise EXDEV in dmu_send_estimate_fast.
+	 */
+	error = lzc_send_space_resume_redacted(fromfull, tofull, 0, 0, 0, 0,
+	    NULL, fd, &size);
+	if (error != EXDEV)
+		errx(EX_OSERR, "lzc_send_space_resume_redacted(\"%s\", \"%s\")"
+		    " should have failed with EXDEV, not %d",
+		    fromfull, tofull, error);
+	printf("lzc_send_space_resume_redacted(\"%s\", \"%s\"): %s\n",
+	    fromfull, tofull, strerror(error));
+
+	close(fd);
+	libzfs_fini(zhdl);
+	free((void *)fsname);
+
+	return (EXIT_SUCCESS);
+}