--- /dev/null
+/*
+ * Copyright (c) 2018 Citrix Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "hw/hw.h"
+#include "hw/xen/xen-block.h"
+#include "trace.h"
+
+static void xen_block_unrealize(XenDevice *xendev, Error **errp)
+{
+ XenBlockDevice *blockdev = XEN_BLOCK_DEVICE(xendev);
+ XenBlockDeviceClass *blockdev_class =
+ XEN_BLOCK_DEVICE_GET_CLASS(xendev);
+ const char *type = object_get_typename(OBJECT(blockdev));
+ XenBlockVdev *vdev = &blockdev->vdev;
+
+ if (vdev->type == XEN_BLOCK_VDEV_TYPE_INVALID) {
+ return;
+ }
+
+ trace_xen_block_unrealize(type, vdev->disk, vdev->partition);
+
+ if (blockdev_class->unrealize) {
+ blockdev_class->unrealize(blockdev, errp);
+ }
+}
+
+static void xen_block_realize(XenDevice *xendev, Error **errp)
+{
+ XenBlockDevice *blockdev = XEN_BLOCK_DEVICE(xendev);
+ XenBlockDeviceClass *blockdev_class =
+ XEN_BLOCK_DEVICE_GET_CLASS(xendev);
+ const char *type = object_get_typename(OBJECT(blockdev));
+ XenBlockVdev *vdev = &blockdev->vdev;
+ Error *local_err = NULL;
+
+ if (vdev->type == XEN_BLOCK_VDEV_TYPE_INVALID) {
+ error_setg(errp, "vdev property not set");
+ return;
+ }
+
+ trace_xen_block_realize(type, vdev->disk, vdev->partition);
+
+ if (blockdev_class->realize) {
+ blockdev_class->realize(blockdev, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ }
+ }
+}
+
+static char *disk_to_vbd_name(unsigned int disk)
+{
+ char *name, *prefix = (disk >= 26) ?
+ disk_to_vbd_name((disk / 26) - 1) : g_strdup("");
+
+ name = g_strdup_printf("%s%c", prefix, 'a' + disk % 26);
+ g_free(prefix);
+
+ return name;
+}
+
+static void xen_block_get_vdev(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ XenBlockVdev *vdev = qdev_get_prop_ptr(dev, prop);
+ char *str;
+
+ switch (vdev->type) {
+ case XEN_BLOCK_VDEV_TYPE_DP:
+ str = g_strdup_printf("d%lup%lu", vdev->disk, vdev->partition);
+ break;
+
+ case XEN_BLOCK_VDEV_TYPE_XVD:
+ case XEN_BLOCK_VDEV_TYPE_HD:
+ case XEN_BLOCK_VDEV_TYPE_SD: {
+ char *name = disk_to_vbd_name(vdev->disk);
+
+ str = g_strdup_printf("%s%s%lu",
+ (vdev->type == XEN_BLOCK_VDEV_TYPE_XVD) ?
+ "xvd" :
+ (vdev->type == XEN_BLOCK_VDEV_TYPE_HD) ?
+ "hd" :
+ "sd",
+ name, vdev->partition);
+ g_free(name);
+ break;
+ }
+ default:
+ error_setg(errp, "invalid vdev type");
+ return;
+ }
+
+ visit_type_str(v, name, &str, errp);
+ g_free(str);
+}
+
+static unsigned int vbd_name_to_disk(const char *name, const char **endp)
+{
+ unsigned int disk = 0;
+
+ while (*name != '\0') {
+ if (!g_ascii_isalpha(*name) || !g_ascii_islower(*name)) {
+ break;
+ }
+
+ disk *= 26;
+ disk += *name++ - 'a' + 1;
+ }
+ *endp = name;
+
+ return disk - 1;
+}
+
+static void xen_block_set_vdev(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ DeviceState *dev = DEVICE(obj);
+ Property *prop = opaque;
+ XenBlockVdev *vdev = qdev_get_prop_ptr(dev, prop);
+ Error *local_err = NULL;
+ char *str, *p;
+ const char *end;
+
+ if (dev->realized) {
+ qdev_prop_set_after_realize(dev, name, errp);
+ return;
+ }
+
+ visit_type_str(v, name, &str, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ p = strchr(str, 'd');
+ if (!p) {
+ goto invalid;
+ }
+
+ *p++ = '\0';
+ if (*str == '\0') {
+ vdev->type = XEN_BLOCK_VDEV_TYPE_DP;
+ } else if (strcmp(str, "xv") == 0) {
+ vdev->type = XEN_BLOCK_VDEV_TYPE_XVD;
+ } else if (strcmp(str, "h") == 0) {
+ vdev->type = XEN_BLOCK_VDEV_TYPE_HD;
+ } else if (strcmp(str, "s") == 0) {
+ vdev->type = XEN_BLOCK_VDEV_TYPE_SD;
+ } else {
+ goto invalid;
+ }
+
+ if (vdev->type == XEN_BLOCK_VDEV_TYPE_DP) {
+ if (qemu_strtoul(p, &end, 10, &vdev->disk)) {
+ goto invalid;
+ }
+
+ if (*end == 'p') {
+ p = (char *) ++end;
+ if (*end == '\0') {
+ goto invalid;
+ }
+ }
+ } else {
+ vdev->disk = vbd_name_to_disk(p, &end);
+ }
+
+ if (*end != '\0') {
+ p = (char *)end;
+
+ if (qemu_strtoul(p, &end, 10, &vdev->partition)) {
+ goto invalid;
+ }
+
+ if (*end != '\0') {
+ goto invalid;
+ }
+ } else {
+ vdev->partition = 0;
+ }
+
+ switch (vdev->type) {
+ case XEN_BLOCK_VDEV_TYPE_DP:
+ case XEN_BLOCK_VDEV_TYPE_XVD:
+ if (vdev->disk < (1 << 4) && vdev->partition < (1 << 4)) {
+ vdev->number = (202 << 8) | (vdev->disk << 4) |
+ vdev->partition;
+ } else if (vdev->disk < (1 << 20) && vdev->partition < (1 << 8)) {
+ vdev->number = (1 << 28) | (vdev->disk << 8) |
+ vdev->partition;
+ } else {
+ goto invalid;
+ }
+ break;
+
+ case XEN_BLOCK_VDEV_TYPE_HD:
+ if ((vdev->disk == 0 || vdev->disk == 1) &&
+ vdev->partition < (1 << 6)) {
+ vdev->number = (3 << 8) | (vdev->disk << 6) | vdev->partition;
+ } else if ((vdev->disk == 2 || vdev->disk == 3) &&
+ vdev->partition < (1 << 6)) {
+ vdev->number = (22 << 8) | ((vdev->disk - 2) << 6) |
+ vdev->partition;
+ } else {
+ goto invalid;
+ }
+ break;
+
+ case XEN_BLOCK_VDEV_TYPE_SD:
+ if (vdev->disk < (1 << 4) && vdev->partition < (1 << 4)) {
+ vdev->number = (8 << 8) | (vdev->disk << 4) | vdev->partition;
+ } else {
+ goto invalid;
+ }
+ break;
+
+ default:
+ goto invalid;
+ }
+
+ g_free(str);
+ return;
+
+invalid:
+ error_setg(errp, "invalid virtual disk specifier");
+
+ vdev->type = XEN_BLOCK_VDEV_TYPE_INVALID;
+ g_free(str);
+}
+
+/*
+ * This property deals with 'vdev' names adhering to the Xen VBD naming
+ * scheme described in:
+ *
+ * https://xenbits.xen.org/docs/unstable/man/xen-vbd-interface.7.html
+ */
+const PropertyInfo xen_block_prop_vdev = {
+ .name = "str",
+ .description = "Virtual Disk specifier: d*p*/xvd*/hd*/sd*",
+ .get = xen_block_get_vdev,
+ .set = xen_block_set_vdev,
+};
+
+static Property xen_block_props[] = {
+ DEFINE_PROP("vdev", XenBlockDevice, vdev,
+ xen_block_prop_vdev, XenBlockVdev),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static void xen_block_class_init(ObjectClass *class, void *data)
+{
+ DeviceClass *dev_class = DEVICE_CLASS(class);
+ XenDeviceClass *xendev_class = XEN_DEVICE_CLASS(class);
+
+ xendev_class->realize = xen_block_realize;
+ xendev_class->unrealize = xen_block_unrealize;
+
+ dev_class->props = xen_block_props;
+}
+
+static const TypeInfo xen_block_type_info = {
+ .name = TYPE_XEN_BLOCK_DEVICE,
+ .parent = TYPE_XEN_DEVICE,
+ .instance_size = sizeof(XenBlockDevice),
+ .abstract = true,
+ .class_size = sizeof(XenBlockDeviceClass),
+ .class_init = xen_block_class_init,
+};
+
+static void xen_disk_unrealize(XenBlockDevice *blockdev, Error **errp)
+{
+ trace_xen_disk_unrealize();
+}
+
+static void xen_disk_realize(XenBlockDevice *blockdev, Error **errp)
+{
+ trace_xen_disk_realize();
+}
+
+static void xen_disk_class_init(ObjectClass *class, void *data)
+{
+ DeviceClass *dev_class = DEVICE_CLASS(class);
+ XenBlockDeviceClass *blockdev_class = XEN_BLOCK_DEVICE_CLASS(class);
+
+ blockdev_class->realize = xen_disk_realize;
+ blockdev_class->unrealize = xen_disk_unrealize;
+
+ dev_class->desc = "Xen Disk Device";
+}
+
+static const TypeInfo xen_disk_type_info = {
+ .name = TYPE_XEN_DISK_DEVICE,
+ .parent = TYPE_XEN_BLOCK_DEVICE,
+ .instance_size = sizeof(XenDiskDevice),
+ .class_init = xen_disk_class_init,
+};
+
+static void xen_cdrom_unrealize(XenBlockDevice *blockdev, Error **errp)
+{
+ trace_xen_cdrom_unrealize();
+}
+
+static void xen_cdrom_realize(XenBlockDevice *blockdev, Error **errp)
+{
+ trace_xen_cdrom_realize();
+}
+
+static void xen_cdrom_class_init(ObjectClass *class, void *data)
+{
+ DeviceClass *dev_class = DEVICE_CLASS(class);
+ XenBlockDeviceClass *blockdev_class = XEN_BLOCK_DEVICE_CLASS(class);
+
+ blockdev_class->realize = xen_cdrom_realize;
+ blockdev_class->unrealize = xen_cdrom_unrealize;
+
+ dev_class->desc = "Xen CD-ROM Device";
+}
+
+static const TypeInfo xen_cdrom_type_info = {
+ .name = TYPE_XEN_CDROM_DEVICE,
+ .parent = TYPE_XEN_BLOCK_DEVICE,
+ .instance_size = sizeof(XenCDRomDevice),
+ .class_init = xen_cdrom_class_init,
+};
+
+static void xen_block_register_types(void)
+{
+ type_register_static(&xen_block_type_info);
+ type_register_static(&xen_disk_type_info);
+ type_register_static(&xen_cdrom_type_info);
+}
+
+type_init(xen_block_register_types)
--- /dev/null
+/*
+ * Copyright (c) 2018 Citrix Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_XEN_BLOCK_H
+#define HW_XEN_BLOCK_H
+
+#include "hw/xen/xen-bus.h"
+
+typedef enum XenBlockVdevType {
+ XEN_BLOCK_VDEV_TYPE_INVALID,
+ XEN_BLOCK_VDEV_TYPE_DP,
+ XEN_BLOCK_VDEV_TYPE_XVD,
+ XEN_BLOCK_VDEV_TYPE_HD,
+ XEN_BLOCK_VDEV_TYPE_SD,
+ XEN_BLOCK_VDEV_TYPE__MAX
+} XenBlockVdevType;
+
+typedef struct XenBlockVdev {
+ XenBlockVdevType type;
+ unsigned long disk;
+ unsigned long partition;
+ unsigned long number;
+} XenBlockVdev;
+
+typedef struct XenBlockDevice {
+ XenDevice xendev;
+ XenBlockVdev vdev;
+} XenBlockDevice;
+
+typedef void (*XenBlockDeviceRealize)(XenBlockDevice *blockdev, Error **errp);
+typedef void (*XenBlockDeviceUnrealize)(XenBlockDevice *blockdev, Error **errp);
+
+typedef struct XenBlockDeviceClass {
+ /*< private >*/
+ XenDeviceClass parent_class;
+ /*< public >*/
+ XenBlockDeviceRealize realize;
+ XenBlockDeviceUnrealize unrealize;
+} XenBlockDeviceClass;
+
+#define TYPE_XEN_BLOCK_DEVICE "xen-block"
+#define XEN_BLOCK_DEVICE(obj) \
+ OBJECT_CHECK(XenBlockDevice, (obj), TYPE_XEN_BLOCK_DEVICE)
+#define XEN_BLOCK_DEVICE_CLASS(class) \
+ OBJECT_CLASS_CHECK(XenBlockDeviceClass, (class), TYPE_XEN_BLOCK_DEVICE)
+#define XEN_BLOCK_DEVICE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(XenBlockDeviceClass, (obj), TYPE_XEN_BLOCK_DEVICE)
+
+typedef struct XenDiskDevice {
+ XenBlockDevice blockdev;
+} XenDiskDevice;
+
+#define TYPE_XEN_DISK_DEVICE "xen-disk"
+#define XEN_DISK_DEVICE(obj) \
+ OBJECT_CHECK(XenDiskDevice, (obj), TYPE_XEN_DISK_DEVICE)
+
+typedef struct XenCDRomDevice {
+ XenBlockDevice blockdev;
+} XenCDRomDevice;
+
+#define TYPE_XEN_CDROM_DEVICE "xen-cdrom"
+#define XEN_CDROM_DEVICE(obj) \
+ OBJECT_CHECK(XenCDRomDevice, (obj), TYPE_XEN_CDROM_DEVICE)
+
+#endif /* HW_XEN_BLOCK_H */
projects / people / pauldu / qemu.git / commitdiff