| Message ID | 1343169246-17636-10-git-send-email-nab@linux-iscsi.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Il 25/07/2012 00:34, Nicholas A. Bellinger ha scritto: > From: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> > > 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. > > 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) > > Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> > Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> > Cc: Anthony Liguori <aliguori@us.ibm.com> > Cc: Paolo Bonzini <pbonzini@redhat.com> > Cc: Michael S. Tsirkin <mst@redhat.com> > Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> > --- > configure | 10 +++ > hw/Makefile.objs | 1 + > hw/qdev-properties.c | 32 +++++++++ > hw/qdev.h | 3 + > hw/vhost-scsi.c | 173 ++++++++++++++++++++++++++++++++++++++++++++++++++ > hw/vhost-scsi.h | 50 ++++++++++++++ > qemu-common.h | 1 + > qemu-config.c | 16 +++++ > qemu-options.hx | 4 + > vl.c | 18 +++++ > 10 files changed, 308 insertions(+), 0 deletions(-) > create mode 100644 hw/vhost-scsi.c > create mode 100644 hw/vhost-scsi.h > > diff --git a/configure b/configure > index cef0a71..2291e7e 100755 > --- a/configure > +++ b/configure > @@ -144,6 +144,7 @@ libattr="" > xfs="" > > vhost_net="no" > +vhost_scsi="no" > kvm="no" > gprof="no" > debug_tcg="no" > @@ -489,6 +490,7 @@ 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 > @@ -794,6 +796,10 @@ for opt do > ;; > --enable-vhost-net) vhost_net="yes" > ;; > + --disable-vhost-net) vhost_scsi="no" > + ;; > + --enable-vhost-net) vhost_scsi="yes" > + ;; Case labels are using vhost-net. > --disable-opengl) opengl="no" > ;; > --enable-opengl) opengl="yes" > @@ -3059,6 +3065,7 @@ 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 $spice" > @@ -3762,6 +3769,9 @@ case "$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 8327e55..37a0d0e 100644 > --- a/hw/Makefile.objs > +++ b/hw/Makefile.objs > @@ -161,6 +161,7 @@ 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 24b39e8..0c538d2 100644 > --- a/hw/qdev-properties.c > +++ b/hw/qdev-properties.c > @@ -3,6 +3,7 @@ > #include "qerror.h" > #include "blockdev.h" > #include "hw/block-common.h" > +#include "vhost-scsi.h" > > void *qdev_get_prop_ptr(DeviceState *dev, Property *prop) > { > @@ -685,6 +686,37 @@ PropertyInfo qdev_prop_vlan = { > .set = set_vlan, > }; > > +/* --- vhost-scsi --- */ > + > +static int parse_vhost_scsi(DeviceState *dev, Property *prop, const char *str) > +{ > + VHostSCSI **ptr = qdev_get_prop_ptr(dev, prop); > + > + *ptr = find_vhost_scsi(str); > + if (*ptr == NULL) { > + return -ENOENT; > + } > + return 0; > +} > + > +static int print_vhost_scsi(DeviceState *dev, Property *prop, > + char *dest, size_t len) > +{ > + VHostSCSI **ptr = qdev_get_prop_ptr(dev, prop); > + > + if (*ptr) { > + return snprintf(dest, len, "%s", vhost_scsi_get_id(*ptr)); > + } else { > + return snprintf(dest, len, "<null>"); > + } > +} > + > +PropertyInfo qdev_prop_vhost_scsi = { > + .name = "vhost-scsi", > + .parse = parse_vhost_scsi, > + .print = print_vhost_scsi, > +}; This has changed, see how we do get_netdev/set_netdev. > /* --- pointer --- */ > > /* Not a proper property, just for dirty hacks. TODO Remove it! */ > diff --git a/hw/qdev.h b/hw/qdev.h > index a2cbd9d..ddc0791 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..9ab314c > --- /dev/null > +++ b/hw/vhost-scsi.c > @@ -0,0 +1,173 @@ > +/* > + * 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. > + * > + */ > + > +#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; > + 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, &backend); > + if (ret < 0) { > + ret = -errno; > + vhost_dev_stop(&vs->dev, vdev); > + return ret; > + } > + if (backend.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", backend.abi_version, > + VHOST_SCSI_ABI_VERSION); > + ret = -ENOSYS; > + vhost_dev_stop(&vs->dev, vdev); > + return ret; > + } > + printf("Using TCM_Vhost ABI version: %d\n", backend.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; > + } > + > + fprintf(stderr, "vhost_scsi_start\n"); > + return 0; > +} > + > +void vhost_scsi_stop(VHostSCSI *vs, VirtIODevice *vdev) > +{ > + fprintf(stderr, "vhost_scsi_stop\n"); > + > + 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..fb6d37a > --- /dev/null > +++ b/hw/vhost-scsi.h > @@ -0,0 +1,50 @@ > +/* > + * 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 "qemu-option.h" > + > +/* > + * Used by QEMU userspace to ensure a consistent vhost-scsi ABI. > + * > + * ABI Rev 0: All pre 2012 revisions used by prototype out-of-tree code > + * ABI Rev 1: 2012 version for v3.6 kernel merge candidate > + */ > + > +#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; > + 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 7c8dac8..ce431b7 100644 > --- a/qemu-common.h > +++ b/qemu-common.h > @@ -262,6 +262,7 @@ 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, > + }, Why have the wwpn and tpgt (which should really be tgpt) both in vhost-scsi and in virtio-scsi? Can we just add them to vhost-scsi? > + { /* 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 dc68e15..c3911a8 100644 > --- a/qemu-options.hx > +++ b/qemu-options.hx > @@ -561,6 +561,10 @@ possible drivers and properties, use @code{-device ?} and > ETEXI > > DEFHEADING() > +DEF("vhost-scsi", HAS_ARG, QEMU_OPTION_vhost_scsi, > + "-virtio-scsi wwpn=string0,tpgt=number0\n" -vhost-scsi, not -virtio-scsi. > + " add vhost-scsi device\n", > + QEMU_ARCH_ALL) > > DEFHEADING(File system options:) > > diff --git a/vl.c b/vl.c > index 8904db1..063ca1d 100644 > --- a/vl.c > +++ b/vl.c > @@ -143,6 +143,7 @@ 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 > @@ -1854,6 +1855,14 @@ 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; > @@ -2613,6 +2622,11 @@ 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; > @@ -3333,6 +3347,10 @@ 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(); > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/configure b/configure index cef0a71..2291e7e 100755 --- a/configure +++ b/configure @@ -144,6 +144,7 @@ libattr="" xfs="" vhost_net="no" +vhost_scsi="no" kvm="no" gprof="no" debug_tcg="no" @@ -489,6 +490,7 @@ 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 @@ -794,6 +796,10 @@ for opt do ;; --enable-vhost-net) vhost_net="yes" ;; + --disable-vhost-net) vhost_scsi="no" + ;; + --enable-vhost-net) vhost_scsi="yes" + ;; --disable-opengl) opengl="no" ;; --enable-opengl) opengl="yes" @@ -3059,6 +3065,7 @@ 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 $spice" @@ -3762,6 +3769,9 @@ case "$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 8327e55..37a0d0e 100644 --- a/hw/Makefile.objs +++ b/hw/Makefile.objs @@ -161,6 +161,7 @@ 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 24b39e8..0c538d2 100644 --- a/hw/qdev-properties.c +++ b/hw/qdev-properties.c @@ -3,6 +3,7 @@ #include "qerror.h" #include "blockdev.h" #include "hw/block-common.h" +#include "vhost-scsi.h" void *qdev_get_prop_ptr(DeviceState *dev, Property *prop) { @@ -685,6 +686,37 @@ PropertyInfo qdev_prop_vlan = { .set = set_vlan, }; +/* --- vhost-scsi --- */ + +static int parse_vhost_scsi(DeviceState *dev, Property *prop, const char *str) +{ + VHostSCSI **ptr = qdev_get_prop_ptr(dev, prop); + + *ptr = find_vhost_scsi(str); + if (*ptr == NULL) { + return -ENOENT; + } + return 0; +} + +static int print_vhost_scsi(DeviceState *dev, Property *prop, + char *dest, size_t len) +{ + VHostSCSI **ptr = qdev_get_prop_ptr(dev, prop); + + if (*ptr) { + return snprintf(dest, len, "%s", vhost_scsi_get_id(*ptr)); + } else { + return snprintf(dest, len, "<null>"); + } +} + +PropertyInfo qdev_prop_vhost_scsi = { + .name = "vhost-scsi", + .parse = parse_vhost_scsi, + .print = print_vhost_scsi, +}; + /* --- pointer --- */ /* Not a proper property, just for dirty hacks. TODO Remove it! */ diff --git a/hw/qdev.h b/hw/qdev.h index a2cbd9d..ddc0791 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..9ab314c --- /dev/null +++ b/hw/vhost-scsi.c @@ -0,0 +1,173 @@ +/* + * 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. + * + */ + +#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; + 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, &backend); + if (ret < 0) { + ret = -errno; + vhost_dev_stop(&vs->dev, vdev); + return ret; + } + if (backend.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", backend.abi_version, + VHOST_SCSI_ABI_VERSION); + ret = -ENOSYS; + vhost_dev_stop(&vs->dev, vdev); + return ret; + } + printf("Using TCM_Vhost ABI version: %d\n", backend.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; + } + + fprintf(stderr, "vhost_scsi_start\n"); + return 0; +} + +void vhost_scsi_stop(VHostSCSI *vs, VirtIODevice *vdev) +{ + fprintf(stderr, "vhost_scsi_stop\n"); + + 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..fb6d37a --- /dev/null +++ b/hw/vhost-scsi.h @@ -0,0 +1,50 @@ +/* + * 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 "qemu-option.h" + +/* + * Used by QEMU userspace to ensure a consistent vhost-scsi ABI. + * + * ABI Rev 0: All pre 2012 revisions used by prototype out-of-tree code + * ABI Rev 1: 2012 version for v3.6 kernel merge candidate + */ + +#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; + 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 7c8dac8..ce431b7 100644 --- a/qemu-common.h +++ b/qemu-common.h @@ -262,6 +262,7 @@ 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 dc68e15..c3911a8 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -561,6 +561,10 @@ possible drivers and properties, use @code{-device ?} and ETEXI DEFHEADING() +DEF("vhost-scsi", HAS_ARG, QEMU_OPTION_vhost_scsi, + "-virtio-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 8904db1..063ca1d 100644 --- a/vl.c +++ b/vl.c @@ -143,6 +143,7 @@ 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 @@ -1854,6 +1855,14 @@ 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; @@ -2613,6 +2622,11 @@ 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; @@ -3333,6 +3347,10 @@ 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();