Il 13/08/2012 10:35, Nicholas A. Bellinger ha scritto: > From: Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx> > > This patch adds a new type of host device that drives the vhost_scsi > device. The syntax to add vhost-scsi is: > > qemu -vhost-scsi id=vhost-scsi0,wwpn=...,tpgt=123 > > The virtio-scsi emulated device will make use of vhost-scsi to process > virtio-scsi requests inside the kernel and hand them to the in-kernel > SCSI target stack using the tcm_vhost fabric driver. > > The tcm_vhost driver was merged into the upstream linux kernel for 3.6-rc2, > and the commit can be found here: > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=057cbf49a1f08297 > > Changelog v1 -> v2: > > - Expose ABI version via VHOST_SCSI_GET_ABI_VERSION + use Rev 0 as > starting point for v3.6-rc code (Stefan + ALiguori + nab) > - Fix upstream qemu conflict in hw/qdev-properties.c > - Make GET_ABI_VERSION use int (nab + mst) > - Fix vhost-scsi case lables in configure (reported by paolo) > - Convert qdev_prop_vhost_scsi to use ->get() + ->set() following > qdev_prop_netdev (reported by paolo) > - Fix typo in qemu-options.hx definition of vhost-scsi (reported by paolo) > > Changelog v0 -> v1: > > - Add VHOST_SCSI_SET_ENDPOINT call (stefan) > - Enable vhost notifiers for multiple queues (Zhi) > - clear vhost-scsi endpoint on stopped (Zhi) > - Add CONFIG_VHOST_SCSI for QEMU build configure (nab) > - Rename vhost_vring_target -> vhost_scsi_target (mst + nab) > - Add support for VHOST_SCSI_GET_ABI_VERSION ioctl (aliguori + nab) > > Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx> > Cc: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> > Cc: Anthony Liguori <aliguori@xxxxxxxxxx> > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Cc: Michael S. Tsirkin <mst@xxxxxxxxxx> > Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> > --- > configure | 10 +++ > hw/Makefile.objs | 1 + > hw/qdev-properties.c | 40 ++++++++++++ > hw/qdev.h | 3 + > hw/vhost-scsi.c | 170 ++++++++++++++++++++++++++++++++++++++++++++++++++ > hw/vhost-scsi.h | 50 +++++++++++++++ > qemu-common.h | 1 + > qemu-config.c | 16 +++++ > qemu-options.hx | 4 + > vl.c | 18 +++++ > 10 files changed, 313 insertions(+), 0 deletions(-) > create mode 100644 hw/vhost-scsi.c > create mode 100644 hw/vhost-scsi.h > > diff --git a/configure b/configure > index f0dbc03..1f03202 100755 > --- a/configure > +++ b/configure > @@ -168,6 +168,7 @@ libattr="" > xfs="" > > vhost_net="no" > +vhost_scsi="no" > kvm="no" > gprof="no" > debug_tcg="no" > @@ -513,6 +514,7 @@ 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 > @@ -818,6 +820,10 @@ for opt do > ;; > --enable-vhost-net) vhost_net="yes" > ;; > + --disable-vhost-scsi) vhost_scsi="no" > + ;; > + --enable-vhost-scsi) vhost_scsi="yes" > + ;; > --disable-opengl) opengl="no" > ;; > --enable-opengl) opengl="yes" > @@ -3116,6 +3122,7 @@ echo "posix_madvise $posix_madvise" > 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 $spice" > @@ -3828,6 +3835,9 @@ case "$target_arch2" in > if test "$vhost_net" = "yes" ; then > echo "CONFIG_VHOST_NET=y" >> $config_target_mak > fi > + if test "$vhost_scsi" = "yes" ; then > + echo "CONFIG_VHOST_SCSI=y" >> $config_target_mak > + fi > fi > esac > case "$target_arch2" in > diff --git a/hw/Makefile.objs b/hw/Makefile.objs > index 3ba5dd0..6ab75ec 100644 > --- a/hw/Makefile.objs > +++ b/hw/Makefile.objs > @@ -169,6 +169,7 @@ obj-$(CONFIG_VIRTIO) += virtio.o virtio-blk.o virtio-balloon.o virtio-net.o > obj-$(CONFIG_VIRTIO) += virtio-serial-bus.o virtio-scsi.o > obj-$(CONFIG_SOFTMMU) += vhost_net.o > obj-$(CONFIG_VHOST_NET) += vhost.o > +obj-$(CONFIG_VHOST_SCSI) += vhost-scsi.o > obj-$(CONFIG_REALLY_VIRTFS) += 9pfs/ > obj-$(CONFIG_NO_PCI) += pci-stub.o > obj-$(CONFIG_VGA) += vga.o > diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c > index 8aca0d4..0266266 100644 > --- a/hw/qdev-properties.c > +++ b/hw/qdev-properties.c > @@ -4,6 +4,7 @@ > #include "blockdev.h" > #include "hw/block-common.h" > #include "net/hub.h" > +#include "vhost-scsi.h" > > void *qdev_get_prop_ptr(DeviceState *dev, Property *prop) > { > @@ -696,6 +697,45 @@ PropertyInfo qdev_prop_vlan = { > .set = set_vlan, > }; > > +/* --- vhost-scsi --- */ > + > +static int parse_vhost_scsi_dev(DeviceState *dev, const char *str, void **ptr) > +{ > + VHostSCSI *p; > + > + p = find_vhost_scsi(str); > + if (p == NULL) > + return -ENOENT; > + > + *ptr = p; > + return 0; > +} > + > +static const char *print_vhost_scsi_dev(void *ptr) > +{ > + VHostSCSI *p = ptr; > + > + return (p) ? vhost_scsi_get_id(p) : "<null>"; > +} > + > +static void get_vhost_scsi_dev(Object *obj, Visitor *v, void *opaque, > + const char *name, Error **errp) > +{ > + get_pointer(obj, v, opaque, print_vhost_scsi_dev, name, errp); > +} > + > +static void set_vhost_scsi_dev(Object *obj, Visitor *v, void *opaque, > + const char *name, Error **errp) > +{ > + set_pointer(obj, v, opaque, parse_vhost_scsi_dev, name, errp); > +} > + > +PropertyInfo qdev_prop_vhost_scsi = { > + .name = "vhost-scsi", > + .get = get_vhost_scsi_dev, > + .set = set_vhost_scsi_dev, > +}; > + > /* --- pointer --- */ > > /* Not a proper property, just for dirty hacks. TODO Remove it! */ > diff --git a/hw/qdev.h b/hw/qdev.h > index d699194..d5873bb 100644 > --- a/hw/qdev.h > +++ b/hw/qdev.h > @@ -238,6 +238,7 @@ extern PropertyInfo qdev_prop_vlan; > extern PropertyInfo qdev_prop_pci_devfn; > extern PropertyInfo qdev_prop_blocksize; > extern PropertyInfo qdev_prop_pci_host_devaddr; > +extern PropertyInfo qdev_prop_vhost_scsi; > > #define DEFINE_PROP(_name, _state, _field, _prop, _type) { \ > .name = (_name), \ > @@ -305,6 +306,8 @@ extern PropertyInfo qdev_prop_pci_host_devaddr; > DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_blocksize, uint16_t) > #define DEFINE_PROP_PCI_HOST_DEVADDR(_n, _s, _f) \ > DEFINE_PROP(_n, _s, _f, qdev_prop_pci_host_devaddr, PCIHostDeviceAddress) > +#define DEFINE_PROP_VHOST_SCSI(_n, _s, _f) \ > + DEFINE_PROP(_n, _s, _f, qdev_prop_vhost_scsi, VHostSCSI*) > > #define DEFINE_PROP_END_OF_LIST() \ > {} > diff --git a/hw/vhost-scsi.c b/hw/vhost-scsi.c > new file mode 100644 > index 0000000..7145b2d > --- /dev/null > +++ b/hw/vhost-scsi.c > @@ -0,0 +1,170 @@ > +/* > + * vhost_scsi host device > + * > + * Copyright IBM, Corp. 2011 > + * > + * Authors: > + * Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx> > + * > + * 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 "vhost-scsi.h" > +#include "vhost.h" > + > +struct VHostSCSI { > + const char *id; > + const char *wwpn; > + uint16_t tpgt; > + struct vhost_dev dev; > + struct vhost_virtqueue vqs[3]; > + QLIST_ENTRY(VHostSCSI) list; > +}; > + > +static QLIST_HEAD(, VHostSCSI) vhost_scsi_list = > + QLIST_HEAD_INITIALIZER(vhost_scsi_list); > + > +VHostSCSI *find_vhost_scsi(const char *id) > +{ > + VHostSCSI *vs; > + > + QLIST_FOREACH(vs, &vhost_scsi_list, list) { > + if (strcmp(id, vs->id) == 0) { > + return vs; > + } > + } > + return NULL; > +} > + > +const char *vhost_scsi_get_id(VHostSCSI *vs) > +{ > + return vs->id; > +} > + > +int vhost_scsi_start(VHostSCSI *vs, VirtIODevice *vdev) > +{ > + int ret, abi_version; > + struct vhost_scsi_target backend; > + > + if (!vhost_dev_query(&vs->dev, vdev)) { > + return -ENOTSUP; > + } > + > + vs->dev.nvqs = 3; > + vs->dev.vqs = vs->vqs; > + > + ret = vhost_dev_enable_notifiers(&vs->dev, vdev); > + if (ret < 0) { > + return ret; > + } > + > + ret = vhost_dev_start(&vs->dev, vdev); > + if (ret < 0) { > + return ret; > + } > + > + memset(&backend, 0, sizeof(backend)); > + ret = ioctl(vs->dev.control, VHOST_SCSI_GET_ABI_VERSION, &abi_version); > + if (ret < 0) { > + ret = -errno; > + vhost_dev_stop(&vs->dev, vdev); > + return ret; > + } > + if (abi_version > VHOST_SCSI_ABI_VERSION) { > + fprintf(stderr, "The running tcm_vhost kernel abi_version: %d is greater" > + " than vhost_scsi userspace supports: %d\n", abi_version, > + VHOST_SCSI_ABI_VERSION); > + ret = -ENOSYS; > + vhost_dev_stop(&vs->dev, vdev); > + return ret; > + } > + fprintf(stdout, "TCM_vHost ABI version: %d\n", abi_version); > + > + pstrcpy((char *)backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->wwpn); > + backend.vhost_tpgt = vs->tpgt; > + ret = ioctl(vs->dev.control, VHOST_SCSI_SET_ENDPOINT, &backend); > + if (ret < 0) { > + ret = -errno; > + vhost_dev_stop(&vs->dev, vdev); > + return ret; > + } > + > + return 0; > +} > + > +void vhost_scsi_stop(VHostSCSI *vs, VirtIODevice *vdev) > +{ > + int ret; > + struct vhost_scsi_target backend; > + > + pstrcpy((char *)backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->wwpn); > + backend.vhost_tpgt = vs->tpgt; > + ret = ioctl(vs->dev.control, VHOST_SCSI_CLEAR_ENDPOINT, &backend); > + if (ret < 0) { > + fprintf(stderr, "Failed to clear endpoint\n"); > + } > + > + vhost_dev_stop(&vs->dev, vdev); > +} > + > +static VHostSCSI *vhost_scsi_add(const char *id, const char *wwpn, > + uint16_t tpgt) > +{ > + VHostSCSI *vs = g_malloc0(sizeof(*vs)); > + int ret; > + > + /* TODO set up vhost-scsi device and bind to tcm_vhost/$wwpm/tpgt_$tpgt */ > + fprintf(stderr, "wwpn = \"%s\" tpgt = \"%u\"\n", id, tpgt); > + > + ret = vhost_dev_init(&vs->dev, -1, "/dev/vhost-scsi", false); > + if (ret < 0) { > + fprintf(stderr, "vhost-scsi: vhost initialization failed: %s\n", > + strerror(-ret)); > + return NULL; > + } > + vs->dev.backend_features = 0; > + vs->dev.acked_features = 0; > + > + vs->id = g_strdup(id); > + vs->wwpn = g_strdup(wwpn); > + vs->tpgt = tpgt; > + QLIST_INSERT_HEAD(&vhost_scsi_list, vs, list); > + > + return vs; > +} > + > +VHostSCSI *vhost_scsi_add_opts(QemuOpts *opts) > +{ > + const char *id; > + const char *wwpn; > + uint64_t tpgt; > + > + id = qemu_opts_id(opts); > + if (!id) { > + fprintf(stderr, "vhost-scsi: no id specified\n"); > + return NULL; > + } > + if (find_vhost_scsi(id)) { > + fprintf(stderr, "duplicate vhost-scsi: \"%s\"\n", id); > + return NULL; > + } > + > + wwpn = qemu_opt_get(opts, "wwpn"); > + if (!wwpn) { > + fprintf(stderr, "vhost-scsi: \"%s\" missing wwpn\n", id); > + return NULL; > + } > + > + tpgt = qemu_opt_get_number(opts, "tpgt", UINT64_MAX); > + if (tpgt > UINT16_MAX) { > + fprintf(stderr, "vhost-scsi: \"%s\" needs a 16-bit tpgt\n", id); > + return NULL; > + } > + > + return vhost_scsi_add(id, wwpn, tpgt); > +} > diff --git a/hw/vhost-scsi.h b/hw/vhost-scsi.h > new file mode 100644 > index 0000000..f3096dc > --- /dev/null > +++ b/hw/vhost-scsi.h > @@ -0,0 +1,50 @@ > +/* > + * vhost_scsi host device > + * > + * Copyright IBM, Corp. 2011 > + * > + * Authors: > + * Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx> > + * > + * 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 "qemu-option.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 > + */ > + > +#define VHOST_SCSI_ABI_VERSION 0 > + > +/* TODO #include <linux/vhost.h> properly */ > +/* For VHOST_SCSI_SET_ENDPOINT/VHOST_SCSI_CLEAR_ENDPOINT ioctl */ > +struct vhost_scsi_target { > + int abi_version; > + unsigned char vhost_wwpn[224]; > + unsigned short vhost_tpgt; > +}; > + > +#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, struct vhost_scsi_target) > + > +VHostSCSI *find_vhost_scsi(const char *id); > +const char *vhost_scsi_get_id(VHostSCSI *vs); > + > +VHostSCSI *vhost_scsi_add_opts(QemuOpts *opts); > + > +int vhost_scsi_start(VHostSCSI *vs, VirtIODevice *vdev); > +void vhost_scsi_stop(VHostSCSI *vs, VirtIODevice *vdev); > + > +#endif > diff --git a/qemu-common.h b/qemu-common.h > index f9deca6..ec36002 100644 > --- a/qemu-common.h > +++ b/qemu-common.h > @@ -280,6 +280,7 @@ typedef struct EventNotifier EventNotifier; > typedef struct VirtIODevice VirtIODevice; > typedef struct QEMUSGList QEMUSGList; > typedef struct SHPCDevice SHPCDevice; > +typedef struct VHostSCSI VHostSCSI; > > typedef uint64_t pcibus_t; > > diff --git a/qemu-config.c b/qemu-config.c > index 5c3296b..33399ea 100644 > --- a/qemu-config.c > +++ b/qemu-config.c > @@ -626,6 +626,21 @@ QemuOptsList qemu_boot_opts = { > }, > }; > > +QemuOptsList qemu_vhost_scsi_opts = { > + .name = "vhost-scsi", > + .head = QTAILQ_HEAD_INITIALIZER(qemu_vhost_scsi_opts.head), > + .desc = { > + { > + .name = "wwpn", > + .type = QEMU_OPT_STRING, > + }, { > + .name = "tpgt", > + .type = QEMU_OPT_NUMBER, > + }, > + { /* end of list */ } > + }, > +}; > + > static QemuOptsList *vm_config_groups[32] = { > &qemu_drive_opts, > &qemu_chardev_opts, > @@ -641,6 +656,7 @@ static QemuOptsList *vm_config_groups[32] = { > &qemu_machine_opts, > &qemu_boot_opts, > &qemu_iscsi_opts, > + &qemu_vhost_scsi_opts, > NULL, > }; > > diff --git a/qemu-options.hx b/qemu-options.hx > index 47cb5bd..4e7a03c 100644 > --- a/qemu-options.hx > +++ b/qemu-options.hx > @@ -565,6 +565,10 @@ possible drivers and properties, use @code{-device ?} and > ETEXI > > DEFHEADING() > +DEF("vhost-scsi", HAS_ARG, QEMU_OPTION_vhost_scsi, > + "-vhost-scsi wwpn=string0,tpgt=number0\n" > + " add vhost-scsi device\n", > + QEMU_ARCH_ALL) > > DEFHEADING(File system options:) > > diff --git a/vl.c b/vl.c > index 91076f0..61c8284 100644 > --- a/vl.c > +++ b/vl.c > @@ -144,6 +144,7 @@ int main(int argc, char **argv) > #include "qemu-options.h" > #include "qmp-commands.h" > #include "main-loop.h" > +#include "hw/vhost-scsi.h" > #ifdef CONFIG_VIRTFS > #include "fsdev/qemu-fsdev.h" > #endif > @@ -1858,6 +1859,14 @@ static int fsdev_init_func(QemuOpts *opts, void *opaque) > } > #endif > > +static int vhost_scsi_init_func(QemuOpts *opts, void *opaque) > +{ > + if (!vhost_scsi_add_opts(opts)) { > + return -1; > + } > + return 0; > +} > + > static int mon_init_func(QemuOpts *opts, void *opaque) > { > CharDriverState *chr; > @@ -2617,6 +2626,11 @@ int main(int argc, char **argv, char **envp) > } > break; > #endif > + case QEMU_OPTION_vhost_scsi: > + if (!qemu_opts_parse(qemu_find_opts("vhost-scsi"), optarg, 0)) { > + exit(1); > + } > + break; > #ifdef CONFIG_SLIRP > case QEMU_OPTION_tftp: > legacy_tftp_prefix = optarg; > @@ -3337,6 +3351,10 @@ int main(int argc, char **argv, char **envp) > exit(1); > } > #endif > + if (qemu_opts_foreach(qemu_find_opts("vhost-scsi"), > + vhost_scsi_init_func, NULL, 1)) { > + exit(1); > + } > > os_daemonize(); > > Anthony, do you think your -object patches are going to go in? Perhaps we should reuse that option instead of inventing <option-of-the-day> every time. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
