1 files changed, 290 insertions, 0 deletions
diff --git a/tests/qtest/libqos/virtio-9p.c b/tests/qtest/libqos/virtio-9p.c
new file mode 100644
index 000000000..b4e114328
--- /dev/null
+++ b/tests/qtest/libqos/virtio-9p.c
@@ -0,0 +1,290 @@
+/*
+ * libqos driver framework
+ *
+ * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "qemu/module.h"
+#include "standard-headers/linux/virtio_ids.h"
+#include "virtio-9p.h"
+#include "qgraph.h"
+
+static QGuestAllocator *alloc;
+static char *local_test_path;
+
+/* Concatenates the passed 2 pathes. Returned result must be freed. */
+static char *concat_path(const char* a, const char* b)
+{
+    return g_build_filename(a, b, NULL);
+}
+
+static void init_local_test_path(void)
+{
+    char *pwd = g_get_current_dir();
+    char *template = concat_path(pwd, "qtest-9p-local-XXXXXX");
+    local_test_path = mkdtemp(template);
+    if (!local_test_path) {
+        g_test_message("mkdtemp('%s') failed: %s", template, strerror(errno));
+    }
+    g_assert(local_test_path);
+    g_free(pwd);
+}
+
+void virtio_9p_create_local_test_dir(void)
+{
+    struct stat st;
+    int res;
+
+    init_local_test_path();
+
+    g_assert(local_test_path != NULL);
+    res = mkdir(local_test_path, 0777);
+    if (res < 0) {
+        g_test_message("mkdir('%s') failed: %s", local_test_path,
+                       strerror(errno));
+    }
+
+    /* ensure test directory exists now ... */
+    g_assert(stat(local_test_path, &st) == 0);
+    /* ... and is actually a directory */
+    g_assert((st.st_mode & S_IFMT) == S_IFDIR);
+}
+
+void virtio_9p_remove_local_test_dir(void)
+{
+    g_assert(local_test_path != NULL);
+    char *cmd = g_strdup_printf("rm -fr '%s'\n", local_test_path);
+    int res = system(cmd);
+    if (res < 0) {
+        /* ignore error, dummy check to prevent compiler error */
+    }
+    g_free(cmd);
+}
+
+char *virtio_9p_test_path(const char *path)
+{
+    g_assert(local_test_path);
+    return concat_path(local_test_path, path);
+}
+
+static void virtio_9p_cleanup(QVirtio9P *interface)
+{
+    qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc);
+}
+
+static void virtio_9p_setup(QVirtio9P *interface)
+{
+    uint64_t features;
+
+    features = qvirtio_get_features(interface->vdev);
+    features &= ~(QVIRTIO_F_BAD_FEATURE | (1ull << VIRTIO_RING_F_EVENT_IDX));
+    qvirtio_set_features(interface->vdev, features);
+
+    interface->vq = qvirtqueue_setup(interface->vdev, alloc, 0);
+    qvirtio_set_driver_ok(interface->vdev);
+}
+
+/* virtio-9p-device */
+static void virtio_9p_device_destructor(QOSGraphObject *obj)
+{
+    QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj;
+    QVirtio9P *v9p = &v_9p->v9p;
+
+    virtio_9p_cleanup(v9p);
+}
+
+static void virtio_9p_device_start_hw(QOSGraphObject *obj)
+{
+    QVirtio9PDevice *v_9p = (QVirtio9PDevice *) obj;
+    QVirtio9P *v9p = &v_9p->v9p;
+
+    virtio_9p_setup(v9p);
+}
+
+static void *virtio_9p_get_driver(QVirtio9P *v_9p,
+                                         const char *interface)
+{
+    if (!g_strcmp0(interface, "virtio-9p")) {
+        return v_9p;
+    }
+    if (!g_strcmp0(interface, "virtio")) {
+        return v_9p->vdev;
+    }
+
+    fprintf(stderr, "%s not present in virtio-9p-device\n", interface);
+    g_assert_not_reached();
+}
+
+static void *virtio_9p_device_get_driver(void *object, const char *interface)
+{
+    QVirtio9PDevice *v_9p = object;
+    return virtio_9p_get_driver(&v_9p->v9p, interface);
+}
+
+static void *virtio_9p_device_create(void *virtio_dev,
+                                     QGuestAllocator *t_alloc,
+                                     void *addr)
+{
+    QVirtio9PDevice *virtio_device = g_new0(QVirtio9PDevice, 1);
+    QVirtio9P *interface = &virtio_device->v9p;
+
+    interface->vdev = virtio_dev;
+    alloc = t_alloc;
+
+    virtio_device->obj.destructor = virtio_9p_device_destructor;
+    virtio_device->obj.get_driver = virtio_9p_device_get_driver;
+    virtio_device->obj.start_hw = virtio_9p_device_start_hw;
+
+    return &virtio_device->obj;
+}
+
+/* virtio-9p-pci */
+static void virtio_9p_pci_destructor(QOSGraphObject *obj)
+{
+    QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj;
+    QVirtio9P *interface = &v9_pci->v9p;
+    QOSGraphObject *pci_vobj =  &v9_pci->pci_vdev.obj;
+
+    virtio_9p_cleanup(interface);
+    qvirtio_pci_destructor(pci_vobj);
+}
+
+static void virtio_9p_pci_start_hw(QOSGraphObject *obj)
+{
+    QVirtio9PPCI *v9_pci = (QVirtio9PPCI *) obj;
+    QVirtio9P *interface = &v9_pci->v9p;
+    QOSGraphObject *pci_vobj =  &v9_pci->pci_vdev.obj;
+
+    qvirtio_pci_start_hw(pci_vobj);
+    virtio_9p_setup(interface);
+}
+
+static void *virtio_9p_pci_get_driver(void *object, const char *interface)
+{
+    QVirtio9PPCI *v_9p = object;
+    if (!g_strcmp0(interface, "pci-device")) {
+        return v_9p->pci_vdev.pdev;
+    }
+    return virtio_9p_get_driver(&v_9p->v9p, interface);
+}
+
+static void *virtio_9p_pci_create(void *pci_bus, QGuestAllocator *t_alloc,
+                                  void *addr)
+{
+    QVirtio9PPCI *v9_pci = g_new0(QVirtio9PPCI, 1);
+    QVirtio9P *interface = &v9_pci->v9p;
+    QOSGraphObject *obj = &v9_pci->pci_vdev.obj;
+
+    virtio_pci_init(&v9_pci->pci_vdev, pci_bus, addr);
+    interface->vdev = &v9_pci->pci_vdev.vdev;
+    alloc = t_alloc;
+
+    g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_9P);
+
+    obj->destructor = virtio_9p_pci_destructor;
+    obj->start_hw = virtio_9p_pci_start_hw;
+    obj->get_driver = virtio_9p_pci_get_driver;
+
+    return obj;
+}
+
+/**
+ * Performs regular expression based search and replace on @a haystack.
+ *
+ * @param haystack - input string to be parsed, result of replacement is
+ *                   stored back to @a haystack
+ * @param pattern - the regular expression pattern for scanning @a haystack
+ * @param replace_fmt - matches of supplied @a pattern are replaced by this,
+ *                      if necessary glib printf format can be used to add
+ *                      variable arguments of this function to this
+ *                      replacement string
+ */
+static void regex_replace(GString *haystack, const char *pattern,
+                          const char *replace_fmt, ...)
+{
+    GRegex *regex;
+    char *replace, *s;
+    va_list argp;
+
+    va_start(argp, replace_fmt);
+    replace = g_strdup_vprintf(replace_fmt, argp);
+    va_end(argp);
+
+    regex = g_regex_new(pattern, 0, 0, NULL);
+    s = g_regex_replace(regex, haystack->str, -1, 0, replace, 0, NULL);
+    g_string_assign(haystack, s);
+    g_free(s);
+    g_regex_unref(regex);
+    g_free(replace);
+}
+
+void virtio_9p_assign_local_driver(GString *cmd_line, const char *args)
+{
+    g_assert_nonnull(local_test_path);
+
+    /* replace 'synth' driver by 'local' driver */
+    regex_replace(cmd_line, "-fsdev synth,", "-fsdev local,");
+
+    /* append 'path=...' to '-fsdev ...' group */
+    regex_replace(cmd_line, "(-fsdev \\w[^ ]*)", "\\1,path='%s'",
+                  local_test_path);
+
+    if (!args) {
+        return;
+    }
+
+    /* append passed args to '-fsdev ...' group */
+    regex_replace(cmd_line, "(-fsdev \\w[^ ]*)", "\\1,%s", args);
+}
+
+static void virtio_9p_register_nodes(void)
+{
+    const char *str_simple = "fsdev=fsdev0,mount_tag=" MOUNT_TAG;
+    const char *str_addr = "fsdev=fsdev0,addr=04.0,mount_tag=" MOUNT_TAG;
+
+    QPCIAddress addr = {
+        .devfn = QPCI_DEVFN(4, 0),
+    };
+
+    QOSGraphEdgeOptions opts = {
+        .before_cmd_line = "-fsdev synth,id=fsdev0",
+    };
+
+    /* virtio-9p-device */
+    opts.extra_device_opts = str_simple,
+    qos_node_create_driver("virtio-9p-device", virtio_9p_device_create);
+    qos_node_consumes("virtio-9p-device", "virtio-bus", &opts);
+    qos_node_produces("virtio-9p-device", "virtio");
+    qos_node_produces("virtio-9p-device", "virtio-9p");
+
+    /* virtio-9p-pci */
+    opts.extra_device_opts = str_addr;
+    add_qpci_address(&opts, &addr);
+    qos_node_create_driver("virtio-9p-pci", virtio_9p_pci_create);
+    qos_node_consumes("virtio-9p-pci", "pci-bus", &opts);
+    qos_node_produces("virtio-9p-pci", "pci-device");
+    qos_node_produces("virtio-9p-pci", "virtio");
+    qos_node_produces("virtio-9p-pci", "virtio-9p");
+
+}
+
+libqos_init(virtio_9p_register_nodes);