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[94.39.191.51]) by smtp.gmail.com with ESMTPSA id f21sm3258597wra.5.2017.06.15.03.53.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 15 Jun 2017 03:53:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=lX0fJB1KBIqKHa7FhOUYmWW45PzEwblDOkhJO31Q5u8=; b=mzl75dybQfMLYPKXe++8HBDl2hNj+i+aUB1e1031X63X0bdH7aYI4xtxG1qm/RsKOY wc+I33ocoZz5kT+pLVc0Nr9FPTYR9ANSbm1evA5EEW+xL16QYwoHAZIoGAI616I/5STp Zlg5O1Gu1jXS86Jv4gRS4Utid1KsJzraMCD2Utixu7G0c4gIwPVKKTv7nXDbBA2vPh5c f1Hq9v/XtMz9MqxqU3d3QbT+riKoqQYbSZ10SK5zxotqSGapex3gTMOXvUVVdQaKdgGr dzWIjw7h7bsfqphSQNbSxnGdLryXr+po2q+etvlMwf+9nyauwPMwT+SfzeX2G2ZbnRSb WSSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=lX0fJB1KBIqKHa7FhOUYmWW45PzEwblDOkhJO31Q5u8=; b=tPrLHmU4x5+XcQrMSE744UYNGr9QUf3xCnovvNFZ4Dyr4oMV7F8IviGQGjAUuHVWxl l6teTioQ5576ujplPZfeRZ1a8EYP0wpoHjPsT5ifwUeiK0an6XwiMsPNztiVLdK5intg 4cuS/QVXiySEEPLU9wCgJs0zF1KrEgR0oVtsBEi0jfg0ht2GZnWg2/EV/4A+w0/sIZP3 dQSkofGRNSdqG3bQscLPHQU0gSRDpovKLUNcwDdv8kBs7qcvgYwgCk740i/fF+dTh7E9 AWF7aAPG+Z6b/mYIUwv0t6Z4uC/rzYz8+9p0dWIFVM4CAagDDwfcCPBNcTrFtJD2fONr bi4w== X-Gm-Message-State: AKS2vOxQo+dK9Ho1vTpZp3arxTPf16uii77osr2YUalMRWZHkRv2PCSC VtlWs5Yg0znymDaFfV4= X-Received: by 10.223.161.154 with SMTP id u26mr3127758wru.191.1497524035955; Thu, 15 Jun 2017 03:53:55 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Date: Thu, 15 Jun 2017 12:53:00 +0200 Message-Id: <1497523981-38449-41-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1497523981-38449-1-git-send-email-pbonzini@redhat.com> References: <1497523981-38449-1-git-send-email-pbonzini@redhat.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:400c:c0c::234 Subject: [Qemu-devel] [PULL 40/41] vhost-user-scsi: Introduce vhost-user-scsi host device X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Felipe Franciosi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Felipe Franciosi This commit introduces a vhost-user device for SCSI. This is based on the existing vhost-scsi implementation, but done over vhost-user instead. It also uses a chardev to connect to the backend. Unlike vhost-scsi (today), VMs using vhost-user-scsi can be live migrated. To use it, start Qemu with a command line equivalent to: qemu-system-x86_64 \ -chardev socket,id=3Dvus0,path=3D/tmp/vus.sock \ -device vhost-user-scsi-pci,chardev=3Dvus0,bus=3Dpci.0,addr=3D... A separate commit presents a sample application linked with libiscsi to provide a backend for vhost-user-scsi. Signed-off-by: Felipe Franciosi Message-Id: <1488479153-21203-4-git-send-email-felipe@nutanix.com> Signed-off-by: Paolo Bonzini --- .gitignore | 1 + default-configs/pci.mak | 1 + default-configs/s390x-softmmu.mak | 1 + hw/scsi/Makefile.objs | 1 + hw/scsi/vhost-scsi-common.c | 1 - hw/scsi/vhost-user-scsi.c | 205 ++++++++++++++++++++++++++++++++= ++++ hw/virtio/virtio-pci.c | 58 ++++++++++ hw/virtio/virtio-pci.h | 11 ++ include/hw/virtio/vhost-user-scsi.h | 35 ++++++ include/hw/virtio/virtio-scsi.h | 2 + 10 files changed, 315 insertions(+), 1 deletion(-) create mode 100644 hw/scsi/vhost-user-scsi.c create mode 100644 include/hw/virtio/vhost-user-scsi.h diff --git a/.gitignore b/.gitignore index 11bb1b1..09c2363 100644 --- a/.gitignore +++ b/.gitignore @@ -50,6 +50,7 @@ /qemu-version.h.tmp /module_block.h /vscclient +/vhost-user-scsi /fsdev/virtfs-proxy-helper *.[1-9] *.a diff --git a/default-configs/pci.mak b/default-configs/pci.mak index 3bbeb62..53ff109 100644 --- a/default-configs/pci.mak +++ b/default-configs/pci.mak @@ -43,3 +43,4 @@ CONFIG_VGA=3Dy CONFIG_VGA_PCI=3Dy CONFIG_IVSHMEM=3D$(CONFIG_EVENTFD) CONFIG_ROCKER=3Dy +CONFIG_VHOST_USER_SCSI=3D$(CONFIG_LINUX) diff --git a/default-configs/s390x-softmmu.mak b/default-configs/s390x-soft= mmu.mak index 18aed56..b227a36 100644 --- a/default-configs/s390x-softmmu.mak +++ b/default-configs/s390x-softmmu.mak @@ -1,5 +1,6 @@ CONFIG_PCI=3Dy CONFIG_VIRTIO_PCI=3Dy +CONFIG_VHOST_USER_SCSI=3D$(CONFIG_LINUX) CONFIG_VIRTIO=3Dy CONFIG_SCLPCONSOLE=3Dy CONFIG_TERMINAL3270=3Dy diff --git a/hw/scsi/Makefile.objs b/hw/scsi/Makefile.objs index 54d8754..b188f72 100644 --- a/hw/scsi/Makefile.objs +++ b/hw/scsi/Makefile.objs @@ -11,4 +11,5 @@ obj-$(CONFIG_PSERIES) +=3D spapr_vscsi.o ifeq ($(CONFIG_VIRTIO),y) obj-y +=3D virtio-scsi.o virtio-scsi-dataplane.o obj-$(CONFIG_VHOST_SCSI) +=3D vhost-scsi-common.o vhost-scsi.o +obj-$(CONFIG_VHOST_USER_SCSI) +=3D vhost-scsi-common.o vhost-user-scsi.o endif diff --git a/hw/scsi/vhost-scsi-common.c b/hw/scsi/vhost-scsi-common.c index e41c031..d434b3e 100644 --- a/hw/scsi/vhost-scsi-common.c +++ b/hw/scsi/vhost-scsi-common.c @@ -16,7 +16,6 @@ */ =20 #include "qemu/osdep.h" -#include #include "qapi/error.h" #include "qemu/error-report.h" #include "migration/migration.h" diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c new file mode 100644 index 0000000..500fa6a --- /dev/null +++ b/hw/scsi/vhost-user-scsi.c @@ -0,0 +1,205 @@ +/* + * vhost-user-scsi host device + * + * Copyright (c) 2016 Nutanix Inc. All rights reserved. + * + * Author: + * Felipe Franciosi + * + * This work is largely based on the "vhost-scsi" implementation by: + * Stefan Hajnoczi + * Nicholas Bellinger + * + * This work is licensed under the terms of the GNU LGPL, version 2 or lat= er. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qemu/typedefs.h" +#include "qom/object.h" +#include "hw/fw-path-provider.h" +#include "hw/qdev-core.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-backend.h" +#include "hw/virtio/vhost-user-scsi.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/virtio-access.h" +#include "chardev/char-fe.h" + +/* Features supported by the host application */ +static const int user_feature_bits[] =3D { + VIRTIO_F_NOTIFY_ON_EMPTY, + VIRTIO_RING_F_INDIRECT_DESC, + VIRTIO_RING_F_EVENT_IDX, + VIRTIO_SCSI_F_HOTPLUG, + VHOST_INVALID_FEATURE_BIT +}; + +static void vhost_user_scsi_set_status(VirtIODevice *vdev, uint8_t status) +{ + VHostUserSCSI *s =3D (VHostUserSCSI *)vdev; + VHostSCSICommon *vsc =3D VHOST_SCSI_COMMON(s); + bool start =3D (status & VIRTIO_CONFIG_S_DRIVER_OK) && vdev->vm_runnin= g; + + if (vsc->dev.started =3D=3D start) { + return; + } + + if (start) { + int ret; + + ret =3D vhost_scsi_common_start(vsc); + if (ret < 0) { + error_report("unable to start vhost-user-scsi: %s", strerror(-= ret)); + exit(1); + } + } else { + vhost_scsi_common_stop(vsc); + } +} + +static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq) +{ +} + +static void vhost_user_scsi_realize(DeviceState *dev, Error **errp) +{ + VirtIOSCSICommon *vs =3D VIRTIO_SCSI_COMMON(dev); + VHostUserSCSI *s =3D VHOST_USER_SCSI(dev); + VHostSCSICommon *vsc =3D VHOST_SCSI_COMMON(s); + Error *err =3D NULL; + int ret; + + if (!vs->conf.chardev.chr) { + error_setg(errp, "vhost-user-scsi: missing chardev"); + return; + } + + virtio_scsi_common_realize(dev, vhost_dummy_handle_output, + vhost_dummy_handle_output, + vhost_dummy_handle_output, &err); + if (err !=3D NULL) { + error_propagate(errp, err); + return; + } + + vsc->dev.nvqs =3D 2 + vs->conf.num_queues; + vsc->dev.vqs =3D g_new(struct vhost_virtqueue, vsc->dev.nvqs); + vsc->dev.vq_index =3D 0; + vsc->dev.backend_features =3D 0; + + ret =3D vhost_dev_init(&vsc->dev, (void *)&vs->conf.chardev, + VHOST_BACKEND_TYPE_USER, 0); + if (ret < 0) { + error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s= ", + strerror(-ret)); + return; + } + + /* Channel and lun both are 0 for bootable vhost-user-scsi disk */ + vsc->channel =3D 0; + vsc->lun =3D 0; + vsc->target =3D vs->conf.boot_tpgt; +} + +static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev =3D VIRTIO_DEVICE(dev); + VHostUserSCSI *s =3D VHOST_USER_SCSI(dev); + VHostSCSICommon *vsc =3D VHOST_SCSI_COMMON(s); + + /* This will stop the vhost backend. */ + vhost_user_scsi_set_status(vdev, 0); + + vhost_dev_cleanup(&vsc->dev); + g_free(vsc->dev.vqs); + + virtio_scsi_common_unrealize(dev, errp); +} + +static uint64_t vhost_user_scsi_get_features(VirtIODevice *vdev, + uint64_t features, Error **er= rp) +{ + VHostUserSCSI *s =3D VHOST_USER_SCSI(vdev); + + /* Turn on predefined features supported by this device */ + features |=3D s->host_features; + + return vhost_scsi_common_get_features(vdev, features, errp); +} + +static Property vhost_user_scsi_properties[] =3D { + DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev), + DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0), + DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1), + DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors, + 0xFFFF), + DEFINE_PROP_UINT32("cmd_per_lun", VirtIOSCSICommon, conf.cmd_per_lun, = 128), + DEFINE_PROP_BIT64("hotplug", VHostUserSCSI, host_features, + VIRTIO_SCSI_F_HOTPLUG, + true), + DEFINE_PROP_BIT64("param_change", VHostUserSCSI, host_features, + VIRTIO_SCSI_F_CHANGE, + true), + DEFINE_PROP_END_OF_LIST(), +}; + +static const VMStateDescription vmstate_vhost_scsi =3D { + .name =3D "virtio-scsi", + .minimum_version_id =3D 1, + .version_id =3D 1, + .fields =3D (VMStateField[]) { + VMSTATE_VIRTIO_DEVICE, + VMSTATE_END_OF_LIST() + }, +}; + +static void vhost_user_scsi_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + VirtioDeviceClass *vdc =3D VIRTIO_DEVICE_CLASS(klass); + FWPathProviderClass *fwc =3D FW_PATH_PROVIDER_CLASS(klass); + + dc->props =3D vhost_user_scsi_properties; + dc->vmsd =3D &vmstate_vhost_scsi; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + vdc->realize =3D vhost_user_scsi_realize; + vdc->unrealize =3D vhost_user_scsi_unrealize; + vdc->get_features =3D vhost_user_scsi_get_features; + vdc->set_config =3D vhost_scsi_common_set_config; + vdc->set_status =3D vhost_user_scsi_set_status; + fwc->get_dev_path =3D vhost_scsi_common_get_fw_dev_path; +} + +static void vhost_user_scsi_instance_init(Object *obj) +{ + VHostSCSICommon *vsc =3D VHOST_SCSI_COMMON(obj); + + vsc->feature_bits =3D user_feature_bits; + + /* Add the bootindex property for this object */ + device_add_bootindex_property(obj, &vsc->bootindex, "bootindex", NULL, + DEVICE(vsc), NULL); +} + +static const TypeInfo vhost_user_scsi_info =3D { + .name =3D TYPE_VHOST_USER_SCSI, + .parent =3D TYPE_VHOST_SCSI_COMMON, + .instance_size =3D sizeof(VHostUserSCSI), + .class_init =3D vhost_user_scsi_class_init, + .instance_init =3D vhost_user_scsi_instance_init, + .interfaces =3D (InterfaceInfo[]) { + { TYPE_FW_PATH_PROVIDER }, + { } + }, +}; + +static void virtio_register_types(void) +{ + type_register_static(&vhost_user_scsi_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index f9b7244..20d6a08 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -2135,6 +2135,61 @@ static const TypeInfo vhost_scsi_pci_info =3D { }; #endif =20 +#ifdef CONFIG_LINUX +/* vhost-user-scsi-pci */ +static Property vhost_user_scsi_pci_properties[] =3D { + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, + DEV_NVECTORS_UNSPECIFIED), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **= errp) +{ + VHostUserSCSIPCI *dev =3D VHOST_USER_SCSI_PCI(vpci_dev); + DeviceState *vdev =3D DEVICE(&dev->vdev); + VirtIOSCSICommon *vs =3D VIRTIO_SCSI_COMMON(vdev); + + if (vpci_dev->nvectors =3D=3D DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors =3D vs->conf.num_queues + 3; + } + + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", errp); +} + +static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + VirtioPCIClass *k =3D VIRTIO_PCI_CLASS(klass); + PCIDeviceClass *pcidev_k =3D PCI_DEVICE_CLASS(klass); + k->realize =3D vhost_user_scsi_pci_realize; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + dc->props =3D vhost_user_scsi_pci_properties; + pcidev_k->vendor_id =3D PCI_VENDOR_ID_REDHAT_QUMRANET; + pcidev_k->device_id =3D PCI_DEVICE_ID_VIRTIO_SCSI; + pcidev_k->revision =3D 0x00; + pcidev_k->class_id =3D PCI_CLASS_STORAGE_SCSI; +} + +static void vhost_user_scsi_pci_instance_init(Object *obj) +{ + VHostUserSCSIPCI *dev =3D VHOST_USER_SCSI_PCI(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VHOST_USER_SCSI); + object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), + "bootindex", &error_abort); +} + +static const TypeInfo vhost_user_scsi_pci_info =3D { + .name =3D TYPE_VHOST_USER_SCSI_PCI, + .parent =3D TYPE_VIRTIO_PCI, + .instance_size =3D sizeof(VHostUserSCSIPCI), + .instance_init =3D vhost_user_scsi_pci_instance_init, + .class_init =3D vhost_user_scsi_pci_class_init, +}; +#endif + /* vhost-vsock-pci */ =20 #ifdef CONFIG_VHOST_VSOCK @@ -2612,6 +2667,9 @@ static void virtio_pci_register_types(void) #ifdef CONFIG_VHOST_SCSI type_register_static(&vhost_scsi_pci_info); #endif +#ifdef CONFIG_LINUX + type_register_static(&vhost_user_scsi_pci_info); +#endif #ifdef CONFIG_VHOST_VSOCK type_register_static(&vhost_vsock_pci_info); #endif diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index b095dfc..69f5959 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -26,6 +26,7 @@ #include "hw/virtio/virtio-input.h" #include "hw/virtio/virtio-gpu.h" #include "hw/virtio/virtio-crypto.h" +#include "hw/virtio/vhost-user-scsi.h" =20 #ifdef CONFIG_VIRTFS #include "hw/9pfs/virtio-9p.h" @@ -44,6 +45,7 @@ typedef struct VirtIOBalloonPCI VirtIOBalloonPCI; typedef struct VirtIOSerialPCI VirtIOSerialPCI; typedef struct VirtIONetPCI VirtIONetPCI; typedef struct VHostSCSIPCI VHostSCSIPCI; +typedef struct VHostUserSCSIPCI VHostUserSCSIPCI; typedef struct VirtIORngPCI VirtIORngPCI; typedef struct VirtIOInputPCI VirtIOInputPCI; typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI; @@ -230,6 +232,15 @@ struct VHostSCSIPCI { }; #endif =20 +#define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci" +#define VHOST_USER_SCSI_PCI(obj) \ + OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI) + +struct VHostUserSCSIPCI { + VirtIOPCIProxy parent_obj; + VHostUserSCSI vdev; +}; + /* * virtio-blk-pci: This extends VirtioPCIProxy. */ diff --git a/include/hw/virtio/vhost-user-scsi.h b/include/hw/virtio/vhost-= user-scsi.h new file mode 100644 index 0000000..01861f7 --- /dev/null +++ b/include/hw/virtio/vhost-user-scsi.h @@ -0,0 +1,35 @@ +/* + * vhost-user-scsi host device + * + * Copyright (c) 2016 Nutanix Inc. All rights reserved. + * + * Author: + * Felipe Franciosi + * + * This file is largely based on "vhost-scsi.h" by: + * Stefan Hajnoczi + * + * This work is licensed under the terms of the GNU LGPL, version 2 or lat= er. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#ifndef VHOST_USER_SCSI_H +#define VHOST_USER_SCSI_H + +#include "qemu-common.h" +#include "hw/qdev.h" +#include "hw/virtio/virtio-scsi.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-scsi-common.h" + +#define TYPE_VHOST_USER_SCSI "vhost-user-scsi" +#define VHOST_USER_SCSI(obj) \ + OBJECT_CHECK(VHostUserSCSI, (obj), TYPE_VHOST_USER_SCSI) + +typedef struct VHostUserSCSI { + VHostSCSICommon parent_obj; + uint64_t host_features; +} VHostUserSCSI; + +#endif /* VHOST_USER_SCSI_H */ diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scs= i.h index eac2013..de6ae5a 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -21,6 +21,7 @@ #include "hw/virtio/virtio.h" #include "hw/pci/pci.h" #include "hw/scsi/scsi.h" +#include "chardev/char-fe.h" #include "sysemu/iothread.h" =20 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common" @@ -53,6 +54,7 @@ struct VirtIOSCSIConf { char *vhostfd; char *wwpn; #endif + CharBackend chardev; uint32_t boot_tpgt; IOThread *iothread; }; --=20 1.8.3.1