diff options
| -rwxr-xr-x | configure | 10 | ||||
| -rw-r--r-- | hw/scsi/Makefile.objs | 6 | ||||
| -rw-r--r-- | hw/scsi/vhost-scsi.c | 288 | ||||
| -rw-r--r-- | include/hw/virtio/vhost-scsi.h | 73 | ||||
| -rw-r--r-- | include/hw/virtio/virtio-scsi.h | 2 |
5 files changed, 378 insertions, 1 deletions
@@ -179,6 +179,7 @@ libattr="" xfs="" vhost_net="no" +vhost_scsi="no" kvm="no" gprof="no" debug_tcg="no" @@ -543,6 +544,7 @@ Haiku) usb="linux" kvm="yes" vhost_net="yes" + vhost_scsi="yes" if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then audio_possible_drivers="$audio_possible_drivers fmod" fi @@ -870,6 +872,10 @@ for opt do ;; --enable-vhost-net) vhost_net="yes" ;; + --disable-vhost-scsi) vhost_scsi="no" + ;; + --enable-vhost-scsi) vhost_scsi="yes" + ;; --disable-glx) glx="no" ;; --enable-glx) glx="yes" @@ -3553,6 +3559,7 @@ echo "sigev_thread_id $sigev_thread_id" echo "uuid support $uuid" echo "libcap-ng support $cap_ng" echo "vhost-net support $vhost_net" +echo "vhost-scsi support $vhost_scsi" echo "Trace backend $trace_backend" echo "Trace output file $trace_file-<pid>" echo "spice support $spice ($spice_protocol_version/$spice_server_version)" @@ -3836,6 +3843,9 @@ fi if test "$virtfs" = "yes" ; then echo "CONFIG_VIRTFS=y" >> $config_host_mak fi +if test "$vhost_scsi" = "yes" ; then + echo "CONFIG_VHOST_SCSI=y" >> $config_host_mak +fi if test "$blobs" = "yes" ; then echo "INSTALL_BLOBS=yes" >> $config_host_mak fi diff --git a/hw/scsi/Makefile.objs b/hw/scsi/Makefile.objs index eaec6c87ef..121ddc5cf4 100644 --- a/hw/scsi/Makefile.objs +++ b/hw/scsi/Makefile.objs @@ -6,4 +6,8 @@ common-obj-$(CONFIG_VMW_PVSCSI_SCSI_PCI) += vmw_pvscsi.o common-obj-$(CONFIG_ESP) += esp.o common-obj-$(CONFIG_ESP_PCI) += esp-pci.o obj-$(CONFIG_PSERIES) += spapr_vscsi.o -obj-$(CONFIG_VIRTIO) += virtio-scsi.o + +ifeq ($(CONFIG_VIRTIO),y) +obj-y += virtio-scsi.o +obj-$(CONFIG_VHOST_SCSI) += vhost-scsi.o +endif diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c new file mode 100644 index 0000000000..3dd1a0f2ed --- /dev/null +++ b/hw/scsi/vhost-scsi.c @@ -0,0 +1,288 @@ +/* + * vhost_scsi host device + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> + * + * Changes for QEMU mainline + tcm_vhost kernel upstream: + * Nicholas Bellinger <nab@risingtidesystems.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#include <sys/ioctl.h> +#include "config.h" +#include "qemu/queue.h" +#include "monitor/monitor.h" +#include "migration/migration.h" +#include "hw/virtio/vhost-scsi.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/virtio-scsi.h" + +static int vhost_scsi_set_endpoint(VHostSCSI *s) +{ + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); + struct vhost_scsi_target backend; + int ret; + + memset(&backend, 0, sizeof(backend)); + pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn); + ret = ioctl(s->dev.control, VHOST_SCSI_SET_ENDPOINT, &backend); + if (ret < 0) { + return -errno; + } + return 0; +} + +static void vhost_scsi_clear_endpoint(VHostSCSI *s) +{ + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); + struct vhost_scsi_target backend; + + memset(&backend, 0, sizeof(backend)); + pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn); + ioctl(s->dev.control, VHOST_SCSI_CLEAR_ENDPOINT, &backend); +} + +static int vhost_scsi_start(VHostSCSI *s) +{ + int ret, abi_version, i; + VirtIODevice *vdev = VIRTIO_DEVICE(s); + + if (!vdev->binding->set_guest_notifiers) { + error_report("binding does not support guest notifiers"); + return -ENOSYS; + } + + ret = ioctl(s->dev.control, VHOST_SCSI_GET_ABI_VERSION, &abi_version); + if (ret < 0) { + return -errno; + } + if (abi_version > VHOST_SCSI_ABI_VERSION) { + error_report("vhost-scsi: The running tcm_vhost kernel abi_version:" + " %d is greater than vhost_scsi userspace supports: %d, please" + " upgrade your version of QEMU\n", abi_version, + VHOST_SCSI_ABI_VERSION); + return -ENOSYS; + } + + ret = vhost_dev_enable_notifiers(&s->dev, vdev); + if (ret < 0) { + return ret; + } + + s->dev.acked_features = vdev->guest_features; + ret = vhost_dev_start(&s->dev, vdev); + if (ret < 0) { + error_report("Error start vhost dev"); + goto err_notifiers; + } + + ret = vhost_scsi_set_endpoint(s); + if (ret < 0) { + error_report("Error set vhost-scsi endpoint"); + goto err_vhost_stop; + } + + ret = vdev->binding->set_guest_notifiers(vdev->binding_opaque, s->dev.nvqs, true); + if (ret < 0) { + error_report("Error binding guest notifier"); + goto err_endpoint; + } + + /* guest_notifier_mask/pending not used yet, so just unmask + * everything here. virtio-pci will do the right thing by + * enabling/disabling irqfd. + */ + for (i = 0; i < s->dev.nvqs; i++) { + vhost_virtqueue_mask(&s->dev, vdev, i, false); + } + + return ret; + +err_endpoint: + vhost_scsi_clear_endpoint(s); +err_vhost_stop: + vhost_dev_stop(&s->dev, vdev); +err_notifiers: + vhost_dev_disable_notifiers(&s->dev, vdev); + return ret; +} + +static void vhost_scsi_stop(VHostSCSI *s) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(s); + int ret = 0; + + if (!vdev->binding->set_guest_notifiers) { + ret = vdev->binding->set_guest_notifiers(vdev->binding_opaque, + s->dev.nvqs, false); + if (ret < 0) { + error_report("vhost guest notifier cleanup failed: %d\n", ret); + } + } + assert(ret >= 0); + + vhost_scsi_clear_endpoint(s); + vhost_dev_stop(&s->dev, vdev); + vhost_dev_disable_notifiers(&s->dev, vdev); +} + +static uint32_t vhost_scsi_get_features(VirtIODevice *vdev, + uint32_t features) +{ + VHostSCSI *s = VHOST_SCSI(vdev); + + /* Clear features not supported by host kernel. */ + if (!(s->dev.features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY))) { + features &= ~(1 << VIRTIO_F_NOTIFY_ON_EMPTY); + } + if (!(s->dev.features & (1 << VIRTIO_RING_F_INDIRECT_DESC))) { + features &= ~(1 << VIRTIO_RING_F_INDIRECT_DESC); + } + if (!(s->dev.features & (1 << VIRTIO_RING_F_EVENT_IDX))) { + features &= ~(1 << VIRTIO_RING_F_EVENT_IDX); + } + if (!(s->dev.features & (1 << VIRTIO_SCSI_F_HOTPLUG))) { + features &= ~(1 << VIRTIO_SCSI_F_HOTPLUG); + } + + return features; +} + +static void vhost_scsi_set_config(VirtIODevice *vdev, + const uint8_t *config) +{ + VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); + + if ((uint32_t) ldl_raw(&scsiconf->sense_size) != vs->sense_size || + (uint32_t) ldl_raw(&scsiconf->cdb_size) != vs->cdb_size) { + error_report("vhost-scsi does not support changing the sense data and CDB sizes"); + exit(1); + } +} + +static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val) +{ + VHostSCSI *s = (VHostSCSI *)vdev; + bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK); + + if (s->dev.started == start) { + return; + } + + if (start) { + int ret; + + ret = vhost_scsi_start(s); + if (ret < 0) { + error_report("virtio-scsi: unable to start vhost: %s\n", + strerror(-ret)); + + /* There is no userspace virtio-scsi fallback so exit */ + exit(1); + } + } else { + vhost_scsi_stop(s); + } +} + +static int vhost_scsi_init(VirtIODevice *vdev) +{ + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); + VHostSCSI *s = VHOST_SCSI(vdev); + int vhostfd = -1; + int ret; + + if (!vs->conf.wwpn) { + error_report("vhost-scsi: missing wwpn\n"); + return -EINVAL; + } + + if (vs->conf.vhostfd) { + vhostfd = monitor_handle_fd_param(cur_mon, vs->conf.vhostfd); + if (vhostfd == -1) { + error_report("vhost-scsi: unable to parse vhostfd\n"); + return -EINVAL; + } + } + + ret = virtio_scsi_common_init(vs); + if (ret < 0) { + return ret; + } + + vdev->get_features = vhost_scsi_get_features; + vdev->set_config = vhost_scsi_set_config; + vdev->set_status = vhost_scsi_set_status; + + s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues; + s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs); + s->dev.vq_index = 0; + + ret = vhost_dev_init(&s->dev, vhostfd, "/dev/vhost-scsi", true); + if (ret < 0) { + error_report("vhost-scsi: vhost initialization failed: %s\n", + strerror(-ret)); + return ret; + } + s->dev.backend_features = 0; + + error_setg(&s->migration_blocker, + "vhost-scsi does not support migration"); + migrate_add_blocker(s->migration_blocker); + + return 0; +} + +static int vhost_scsi_exit(DeviceState *qdev) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(qdev); + VHostSCSI *s = VHOST_SCSI(qdev); + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(qdev); + + migrate_del_blocker(s->migration_blocker); + error_free(s->migration_blocker); + + /* This will stop vhost backend. */ + vhost_scsi_set_status(vdev, 0); + + g_free(s->dev.vqs); + return virtio_scsi_common_exit(vs); +} + +static Property vhost_scsi_properties[] = { + DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSI, parent_obj.conf), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_scsi_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + dc->exit = vhost_scsi_exit; + dc->props = vhost_scsi_properties; + vdc->init = vhost_scsi_init; + vdc->get_features = vhost_scsi_get_features; + vdc->set_config = vhost_scsi_set_config; + vdc->set_status = vhost_scsi_set_status; +} + +static const TypeInfo vhost_scsi_info = { + .name = TYPE_VHOST_SCSI, + .parent = TYPE_VIRTIO_SCSI_COMMON, + .instance_size = sizeof(VHostSCSI), + .class_init = vhost_scsi_class_init, +}; + +static void virtio_register_types(void) +{ + type_register_static(&vhost_scsi_info); +} + +type_init(virtio_register_types) diff --git a/include/hw/virtio/vhost-scsi.h b/include/hw/virtio/vhost-scsi.h new file mode 100644 index 0000000000..85cc031281 --- /dev/null +++ b/include/hw/virtio/vhost-scsi.h @@ -0,0 +1,73 @@ +/* + * vhost_scsi host device + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#ifndef VHOST_SCSI_H +#define VHOST_SCSI_H + +#include "qemu-common.h" +#include "hw/qdev.h" +#include "hw/virtio/virtio-scsi.h" +#include "hw/virtio/vhost.h" + +/* + * Used by QEMU userspace to ensure a consistent vhost-scsi ABI. + * + * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate + + * RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage + * ABI Rev 1: January 2013. Ignore vhost_tpgt filed in struct vhost_scsi_target. + * All the targets under vhost_wwpn can be seen and used by guest. + */ + +#define VHOST_SCSI_ABI_VERSION 1 + +/* TODO #include <linux/vhost.h> properly */ +/* For VHOST_SCSI_SET_ENDPOINT/VHOST_SCSI_CLEAR_ENDPOINT ioctl */ +struct vhost_scsi_target { + int abi_version; + char vhost_wwpn[224]; + unsigned short vhost_tpgt; + unsigned short reserved; +}; + +enum vhost_scsi_vq_list { + VHOST_SCSI_VQ_CONTROL = 0, + VHOST_SCSI_VQ_EVENT = 1, + VHOST_SCSI_VQ_NUM_FIXED = 2, +}; + +#define VHOST_VIRTIO 0xAF +#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target) +#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target) +#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int) + +#define TYPE_VHOST_SCSI "vhost-scsi" +#define VHOST_SCSI(obj) \ + OBJECT_CHECK(VHostSCSI, (obj), TYPE_VHOST_SCSI) + +typedef struct VHostSCSI { + VirtIOSCSICommon parent_obj; + + Error *migration_blocker; + + struct vhost_dev dev; +} VHostSCSI; + +#define DEFINE_VHOST_SCSI_PROPERTIES(_state, _conf_field) \ + DEFINE_PROP_STRING("vhostfd", _state, _conf_field.vhostfd), \ + DEFINE_PROP_STRING("wwpn", _state, _conf_field.wwpn), \ + DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \ + DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF), \ + DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128) + + +#endif diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index 4a961b9c5a..4db346b546 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -151,6 +151,8 @@ struct VirtIOSCSIConf { uint32_t num_queues; uint32_t max_sectors; uint32_t cmd_per_lun; + char *vhostfd; + char *wwpn; }; typedef struct VirtIOSCSICommon { |