diff --git a/MAINTAINERS b/MAINTAINERS index 87f90721b9..7514550c06 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -414,7 +414,7 @@ F: hw/9pfs/xen-9p-backend.c F: hw/char/xen_console.c F: hw/display/xenfb.c F: hw/net/xen_nic.c -F: hw/block/xen_* +F: hw/block/xen* F: hw/xen/ F: hw/xenpv/ F: hw/i386/xen/ diff --git a/hw/block/Makefile.objs b/hw/block/Makefile.objs index 53ce5751ae..f34813a377 100644 --- a/hw/block/Makefile.objs +++ b/hw/block/Makefile.objs @@ -4,6 +4,7 @@ common-obj-$(CONFIG_SSI_M25P80) += m25p80.o common-obj-$(CONFIG_NAND) += nand.o common-obj-$(CONFIG_PFLASH_CFI01) += pflash_cfi01.o common-obj-$(CONFIG_PFLASH_CFI02) += pflash_cfi02.o +common-obj-$(CONFIG_XEN) += xen-block.o common-obj-$(CONFIG_XEN) += xen_disk.o common-obj-$(CONFIG_ECC) += ecc.o common-obj-$(CONFIG_ONENAND) += onenand.o diff --git a/hw/block/trace-events b/hw/block/trace-events index 335c092450..4afbd62a88 100644 --- a/hw/block/trace-events +++ b/hw/block/trace-events @@ -127,3 +127,11 @@ xen_disk_init(char *name) "%s" xen_disk_connect(char *name) "%s" xen_disk_disconnect(char *name) "%s" xen_disk_free(char *name) "%s" + +# hw/block/xen-block.c +xen_block_realize(const char *type, uint32_t disk, uint32_t partition) "%s d%up%u" +xen_block_unrealize(const char *type, uint32_t disk, uint32_t partition) "%s d%up%u" +xen_disk_realize(void) "" +xen_disk_unrealize(void) "" +xen_cdrom_realize(void) "" +xen_cdrom_unrealize(void) "" diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c new file mode 100644 index 0000000000..8e78b6a034 --- /dev/null +++ b/hw/block/xen-block.c @@ -0,0 +1,343 @@ +/* + * 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->props.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->props.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, props.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) diff --git a/include/hw/xen/xen-block.h b/include/hw/xen/xen-block.h new file mode 100644 index 0000000000..29413256e9 --- /dev/null +++ b/include/hw/xen/xen-block.h @@ -0,0 +1,73 @@ +/* + * 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 XenBlockProperties { + XenBlockVdev vdev; +} XenBlockProperties; + +typedef struct XenBlockDevice { + XenDevice xendev; + XenBlockProperties props; +} 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 */