From 3722729c29997c440ff1a289228f2953d10b2e5b Mon Sep 17 00:00:00 2001
From: Max Reitz <mreitz@redhat.com>
Date: Wed, 3 Apr 2019 17:13:12 +0100
Subject: [PATCH 05/11] tests: Add unit tests for image locking
RH-Author: Max Reitz <mreitz@redhat.com>
Message-id: <20190403171315.20841-6-mreitz@redhat.com>
Patchwork-id: 85402
O-Subject: [RHEL-8.1 qemu-kvm PATCH 5/8] tests: Add unit tests for image locking
Bugzilla: 1694148
RH-Acked-by: John Snow <jsnow@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
From: Fam Zheng <famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit aef96d7d4f0b6746e329bfa7a1ea38e1611237e3)
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
tests/Makefile.include | 2 +
tests/test-image-locking.c | 157 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 159 insertions(+)
create mode 100644 tests/test-image-locking.c
diff --git a/tests/Makefile.include b/tests/Makefile.include
index d200288..06ed6df 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -97,6 +97,7 @@ check-unit-y += tests/test-bdrv-drain$(EXESUF)
check-unit-y += tests/test-blockjob$(EXESUF)
check-unit-y += tests/test-blockjob-txn$(EXESUF)
check-unit-y += tests/test-block-backend$(EXESUF)
+check-unit-y += tests/test-image-locking$(EXESUF)
check-unit-y += tests/test-x86-cpuid$(EXESUF)
# all code tested by test-x86-cpuid is inside topology.h
gcov-files-test-x86-cpuid-y =
@@ -635,6 +636,7 @@ tests/test-bdrv-drain$(EXESUF): tests/test-bdrv-drain.o $(test-block-obj-y) $(te
tests/test-blockjob$(EXESUF): tests/test-blockjob.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-blockjob-txn$(EXESUF): tests/test-blockjob-txn.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-block-backend$(EXESUF): tests/test-block-backend.o $(test-block-obj-y) $(test-util-obj-y)
+tests/test-image-locking$(EXESUF): tests/test-image-locking.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(test-block-obj-y)
tests/test-iov$(EXESUF): tests/test-iov.o $(test-util-obj-y)
tests/test-hbitmap$(EXESUF): tests/test-hbitmap.o $(test-util-obj-y) $(test-crypto-obj-y)
diff --git a/tests/test-image-locking.c b/tests/test-image-locking.c
new file mode 100644
index 0000000..7614cbf
--- /dev/null
+++ b/tests/test-image-locking.c
@@ -0,0 +1,157 @@
+/*
+ * Image locking tests
+ *
+ * Copyright (c) 2018 Red Hat Inc.
+ *
+ * Author: Fam Zheng <famz@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "block/block.h"
+#include "sysemu/block-backend.h"
+#include "qapi/error.h"
+#include "qapi/qmp/qdict.h"
+
+static BlockBackend *open_image(const char *path,
+ uint64_t perm, uint64_t shared_perm,
+ Error **errp)
+{
+ Error *local_err = NULL;
+ BlockBackend *blk;
+ QDict *options = qdict_new();
+
+ qdict_put_str(options, "driver", "raw");
+ blk = blk_new_open(path, NULL, options, BDRV_O_RDWR, &local_err);
+ if (blk) {
+ g_assert_null(local_err);
+ if (blk_set_perm(blk, perm, shared_perm, errp)) {
+ blk_unref(blk);
+ blk = NULL;
+ }
+ } else {
+ error_propagate(errp, local_err);
+ }
+ return blk;
+}
+
+static void check_locked_bytes(int fd, uint64_t perm_locks,
+ uint64_t shared_perm_locks)
+{
+ int i;
+
+ if (!perm_locks && !shared_perm_locks) {
+ g_assert(!qemu_lock_fd_test(fd, 0, 0, true));
+ return;
+ }
+ for (i = 0; (1ULL << i) <= BLK_PERM_ALL; i++) {
+ uint64_t bit = (1ULL << i);
+ bool perm_expected = !!(bit & perm_locks);
+ bool shared_perm_expected = !!(bit & shared_perm_locks);
+ g_assert_cmpint(perm_expected, ==,
+ !!qemu_lock_fd_test(fd, 100 + i, 1, true));
+ g_assert_cmpint(shared_perm_expected, ==,
+ !!qemu_lock_fd_test(fd, 200 + i, 1, true));
+ }
+}
+
+static void test_image_locking_basic(void)
+{
+ BlockBackend *blk1, *blk2, *blk3;
+ char img_path[] = "/tmp/qtest.XXXXXX";
+ uint64_t perm, shared_perm;
+
+ int fd = mkstemp(img_path);
+ assert(fd >= 0);
+
+ perm = BLK_PERM_WRITE | BLK_PERM_CONSISTENT_READ;
+ shared_perm = BLK_PERM_ALL;
+ blk1 = open_image(img_path, perm, shared_perm, &error_abort);
+ g_assert(blk1);
+
+ check_locked_bytes(fd, perm, ~shared_perm);
+
+ /* compatible perm between blk1 and blk2 */
+ blk2 = open_image(img_path, perm | BLK_PERM_RESIZE, shared_perm, NULL);
+ g_assert(blk2);
+ check_locked_bytes(fd, perm | BLK_PERM_RESIZE, ~shared_perm);
+
+ /* incompatible perm with already open blk1 and blk2 */
+ blk3 = open_image(img_path, perm, BLK_PERM_WRITE_UNCHANGED, NULL);
+ g_assert_null(blk3);
+
+ blk_unref(blk2);
+
+ /* Check that extra bytes in blk2 are correctly unlocked */
+ check_locked_bytes(fd, perm, ~shared_perm);
+
+ blk_unref(blk1);
+
+ /* Image is unused, no lock there */
+ check_locked_bytes(fd, 0, 0);
+ blk3 = open_image(img_path, perm, BLK_PERM_WRITE_UNCHANGED, &error_abort);
+ g_assert(blk3);
+ blk_unref(blk3);
+ close(fd);
+ unlink(img_path);
+}
+
+static void test_set_perm_abort(void)
+{
+ BlockBackend *blk1, *blk2;
+ char img_path[] = "/tmp/qtest.XXXXXX";
+ uint64_t perm, shared_perm;
+ int r;
+ int fd = mkstemp(img_path);
+ assert(fd >= 0);
+
+ perm = BLK_PERM_WRITE | BLK_PERM_CONSISTENT_READ;
+ shared_perm = BLK_PERM_ALL;
+ blk1 = open_image(img_path, perm, shared_perm, &error_abort);
+ g_assert(blk1);
+
+ blk2 = open_image(img_path, perm, shared_perm, &error_abort);
+ g_assert(blk2);
+
+ check_locked_bytes(fd, perm, ~shared_perm);
+
+ /* A failed blk_set_perm mustn't change perm status (locked bytes) */
+ r = blk_set_perm(blk2, perm | BLK_PERM_RESIZE, BLK_PERM_WRITE_UNCHANGED,
+ NULL);
+ g_assert_cmpint(r, !=, 0);
+ check_locked_bytes(fd, perm, ~shared_perm);
+ blk_unref(blk1);
+ blk_unref(blk2);
+}
+
+int main(int argc, char **argv)
+{
+ bdrv_init();
+ qemu_init_main_loop(&error_abort);
+
+ g_test_init(&argc, &argv, NULL);
+
+ if (qemu_has_ofd_lock()) {
+ g_test_add_func("/image-locking/basic", test_image_locking_basic);
+ g_test_add_func("/image-locking/set-perm-abort", test_set_perm_abort);
+ }
+
+ return g_test_run();
+}
--
1.8.3.1