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Re: [Qemu-devel] [PATCH v4 09/22] vhost: use a function for each call
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From: |
Marc-André Lureau |
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Subject: |
Re: [Qemu-devel] [PATCH v4 09/22] vhost: use a function for each call |
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Date: |
Mon, 21 Sep 2015 10:05:56 -0400 (EDT) |
----- Original Message -----
> On Sat, Sep 19, 2015 at 12:12:00PM +0200, address@hidden wrote:
> > From: Marc-André Lureau <address@hidden>
> >
> > Replace the generic vhost_call() by specific functions for each
> > function call to help with type safety and changing arguments.
> >
> > Signed-off-by: Marc-André Lureau <address@hidden>
>
> OK but I would rather not make logging feature depend on the
> refactoring.
The refactoring is straightforward, but I can split this patch.
> How about moving each call over from vhost_call by a separate patch?
> Start with vhost_set_log_base as the 1st one, this way I can apply
> logging support while we still review the larger refactorings.
>
ok
> > ---
> > hw/net/vhost_net.c | 12 +-
> > hw/scsi/vhost-scsi.c | 7 +-
> > hw/virtio/vhost-backend.c | 140 +++++++++++--
> > hw/virtio/vhost-user.c | 402
> > ++++++++++++++++++++++++++------------
> > hw/virtio/vhost.c | 34 ++--
> > include/hw/virtio/vhost-backend.h | 59 +++++-
> > 6 files changed, 484 insertions(+), 170 deletions(-)
> >
> > diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> > index 9d32d76..d116fb3 100644
> > --- a/hw/net/vhost_net.c
> > +++ b/hw/net/vhost_net.c
> > @@ -243,8 +243,7 @@ static int vhost_net_start_one(struct vhost_net *net,
> > file.fd = net->backend;
> > for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
> > const VhostOps *vhost_ops = net->dev.vhost_ops;
> > - r = vhost_ops->vhost_call(&net->dev, VHOST_NET_SET_BACKEND,
> > - &file);
> > + r = vhost_ops->vhost_net_set_backend(&net->dev, &file);
> > if (r < 0) {
> > r = -errno;
> > goto fail;
> > @@ -257,8 +256,7 @@ fail:
> > if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
> > while (file.index-- > 0) {
> > const VhostOps *vhost_ops = net->dev.vhost_ops;
> > - int r = vhost_ops->vhost_call(&net->dev,
> > VHOST_NET_SET_BACKEND,
> > - &file);
> > + int r = vhost_ops->vhost_net_set_backend(&net->dev, &file);
> > assert(r >= 0);
> > }
> > }
> > @@ -280,15 +278,13 @@ static void vhost_net_stop_one(struct vhost_net *net,
> > if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP) {
> > for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
> > const VhostOps *vhost_ops = net->dev.vhost_ops;
> > - int r = vhost_ops->vhost_call(&net->dev,
> > VHOST_NET_SET_BACKEND,
> > - &file);
> > + int r = vhost_ops->vhost_net_set_backend(&net->dev, &file);
> > assert(r >= 0);
> > }
> > } else if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER)
> > {
> > for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
> > const VhostOps *vhost_ops = net->dev.vhost_ops;
> > - int r = vhost_ops->vhost_call(&net->dev, VHOST_RESET_OWNER,
> > - NULL);
> > + int r = vhost_ops->vhost_reset_owner(&net->dev);
> > assert(r >= 0);
> > }
> > }
> > diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c
> > index bac9ddb..a0034ab 100644
> > --- a/hw/scsi/vhost-scsi.c
> > +++ b/hw/scsi/vhost-scsi.c
> > @@ -45,7 +45,7 @@ static int vhost_scsi_set_endpoint(VHostSCSI *s)
> >
> > memset(&backend, 0, sizeof(backend));
> > pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn),
> > vs->conf.wwpn);
> > - ret = vhost_ops->vhost_call(&s->dev, VHOST_SCSI_SET_ENDPOINT,
> > &backend);
> > + ret = vhost_ops->vhost_scsi_set_endpoint(&s->dev, &backend);
> > if (ret < 0) {
> > return -errno;
> > }
> > @@ -60,7 +60,7 @@ static void vhost_scsi_clear_endpoint(VHostSCSI *s)
> >
> > memset(&backend, 0, sizeof(backend));
> > pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn),
> > vs->conf.wwpn);
> > - vhost_ops->vhost_call(&s->dev, VHOST_SCSI_CLEAR_ENDPOINT, &backend);
> > + vhost_ops->vhost_scsi_clear_endpoint(&s->dev, &backend);
> > }
> >
> > static int vhost_scsi_start(VHostSCSI *s)
> > @@ -76,8 +76,7 @@ static int vhost_scsi_start(VHostSCSI *s)
> > return -ENOSYS;
> > }
> >
> > - ret = vhost_ops->vhost_call(&s->dev,
> > - VHOST_SCSI_GET_ABI_VERSION, &abi_version);
> > + ret = vhost_ops->vhost_scsi_get_abi_version(&s->dev, &abi_version);
> > if (ret < 0) {
> > return -errno;
> > }
> > diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c
> > index 4d68a27..bf2d1d4 100644
> > --- a/hw/virtio/vhost-backend.c
> > +++ b/hw/virtio/vhost-backend.c
> > @@ -11,19 +11,10 @@
> > #include "hw/virtio/vhost.h"
> > #include "hw/virtio/vhost-backend.h"
> > #include "qemu/error-report.h"
> > +#include "linux/vhost.h"
> >
> > #include <sys/ioctl.h>
> >
> > -static int vhost_kernel_call(struct vhost_dev *dev, unsigned long int
> > request,
> > - void *arg)
> > -{
> > - int fd = (uintptr_t) dev->opaque;
> > -
> > - assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL);
> > -
> > - return ioctl(fd, request, arg);
> > -}
> > -
> > static int vhost_kernel_init(struct vhost_dev *dev, void *opaque)
> > {
> > assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL);
> > @@ -42,11 +33,136 @@ static int vhost_kernel_cleanup(struct vhost_dev *dev)
> > return close(fd);
> > }
> >
> > +static int vhost_kernel_call(struct vhost_dev *dev,
> > + unsigned long int request, void *arg)
> > +{
> > + int fd = (uintptr_t) dev->opaque;
> > +
> > + assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_KERNEL);
> > +
> > + return ioctl(fd, request, arg);
> > +}
> > +
> > +static int vhost_net_set_backend(struct vhost_dev *dev,
> > + struct vhost_vring_file *file)
> > +{
> > + return vhost_kernel_call(dev, VHOST_NET_SET_BACKEND, file);
> > +}
> > +
> > +static int vhost_scsi_set_endpoint(struct vhost_dev *dev,
> > + struct vhost_scsi_target *target)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SCSI_SET_ENDPOINT, target);
> > +}
> > +
> > +static int vhost_scsi_clear_endpoint(struct vhost_dev *dev,
> > + struct vhost_scsi_target *target)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SCSI_CLEAR_ENDPOINT, target);
> > +}
> > +
> > +static int vhost_scsi_get_abi_version(struct vhost_dev *dev, int *version)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SCSI_GET_ABI_VERSION, version);
> > +}
> > +
> > +static int vhost_set_log_base(struct vhost_dev *dev, uint64_t base)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_LOG_BASE, &base);
> > +}
> > +
> > +static int vhost_set_mem_table(struct vhost_dev *dev,
> > + struct vhost_memory *mem)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_MEM_TABLE, mem);
> > +}
> > +
> > +static int vhost_set_vring_addr(struct vhost_dev *dev,
> > + struct vhost_vring_addr *addr)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_VRING_ADDR, addr);
> > +}
> > +
> > +static int vhost_set_vring_endian(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_VRING_ENDIAN, ring);
> > +}
> > +
> > +static int vhost_set_vring_num(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_VRING_NUM, ring);
> > +}
> > +
> > +static int vhost_set_vring_base(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_VRING_BASE, ring);
> > +}
> > +
> > +static int vhost_get_vring_base(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + return vhost_kernel_call(dev, VHOST_GET_VRING_BASE, ring);
> > +}
> > +
> > +static int vhost_set_vring_kick(struct vhost_dev *dev,
> > + struct vhost_vring_file *file)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_VRING_KICK, file);
> > +}
> > +
> > +static int vhost_set_vring_call(struct vhost_dev *dev,
> > + struct vhost_vring_file *file)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_VRING_CALL, file);
> > +}
> > +
> > +static int vhost_set_features(struct vhost_dev *dev,
> > + uint64_t features)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_FEATURES, &features);
> > +}
> > +
> > +static int vhost_kernel_get_features(struct vhost_dev *dev,
> > + uint64_t *features)
> > +{
> > + return vhost_kernel_call(dev, VHOST_GET_FEATURES, features);
> > +}
> > +
> > +static int vhost_set_owner(struct vhost_dev *dev)
> > +{
> > + return vhost_kernel_call(dev, VHOST_SET_OWNER, NULL);
> > +}
> > +
> > +static int vhost_reset_owner(struct vhost_dev *dev)
> > +{
> > + return vhost_kernel_call(dev, VHOST_RESET_OWNER, NULL);
> > +}
> > +
> > static const VhostOps kernel_ops = {
> > .backend_type = VHOST_BACKEND_TYPE_KERNEL,
> > - .vhost_call = vhost_kernel_call,
> > .vhost_backend_init = vhost_kernel_init,
> > - .vhost_backend_cleanup = vhost_kernel_cleanup
> > + .vhost_backend_cleanup = vhost_kernel_cleanup,
> > +
> > + .vhost_net_set_backend = vhost_net_set_backend,
> > + .vhost_scsi_set_endpoint = vhost_scsi_set_endpoint,
> > + .vhost_scsi_clear_endpoint = vhost_scsi_clear_endpoint,
> > + .vhost_scsi_get_abi_version = vhost_scsi_get_abi_version,
> > + .vhost_set_log_base = vhost_set_log_base,
> > + .vhost_set_mem_table = vhost_set_mem_table,
> > + .vhost_set_vring_addr = vhost_set_vring_addr,
> > + .vhost_set_vring_endian = vhost_set_vring_endian,
> > + .vhost_set_vring_num = vhost_set_vring_num,
> > + .vhost_set_vring_base = vhost_set_vring_base,
> > + .vhost_get_vring_base = vhost_get_vring_base,
> > + .vhost_set_vring_kick = vhost_set_vring_kick,
> > + .vhost_set_vring_call = vhost_set_vring_call,
> > + .vhost_set_features = vhost_set_features,
> > + .vhost_get_features = vhost_kernel_get_features,
> > + .vhost_set_owner = vhost_set_owner,
> > + .vhost_reset_owner = vhost_reset_owner,
> > };
> >
> > int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType
> > backend_type)
> > diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> > index de87562..d5b7951 100644
> > --- a/hw/virtio/vhost-user.c
> > +++ b/hw/virtio/vhost-user.c
> > @@ -176,6 +176,7 @@ fail:
> > return -1;
> > }
> >
> > +/* most non-init callers ignore the error */
> > static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
> > int *fds, int fd_num)
> > {
> > @@ -190,148 +191,280 @@ static int vhost_user_write(struct vhost_dev *dev,
> > VhostUserMsg *msg,
> > 0 : -1;
> > }
> >
> > -static int vhost_user_call(struct vhost_dev *dev, unsigned long int
> > request,
> > - void *arg)
> > +static int vhost_net_set_backend(struct vhost_dev *dev,
> > + struct vhost_vring_file *file)
> > +{
> > + error_report("vhost-user trying to send unhandled ioctl");
> > + return -1;
> > +}
> > +
> > +static int vhost_scsi_set_endpoint(struct vhost_dev *dev,
> > + struct vhost_scsi_target *target)
> > +{
> > + error_report("vhost-user trying to send unhandled ioctl");
> > + return -1;
> > +}
> > +
> > +static int vhost_scsi_clear_endpoint(struct vhost_dev *dev,
> > + struct vhost_scsi_target *target)
> > +{
> > + error_report("vhost-user trying to send unhandled ioctl");
> > + return -1;
> > +}
> > +
> > +static int vhost_scsi_get_abi_version(struct vhost_dev *dev, int *version)
> > +{
> > + error_report("vhost-user trying to send unhandled ioctl");
> > + return -1;
> > +}
> > +
> > +static int vhost_set_log_base(struct vhost_dev *dev, uint64_t base)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_LOG_BASE,
> > + .flags = VHOST_USER_VERSION,
> > + .u64 = base,
> > + .size = sizeof(m.u64),
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_set_mem_table(struct vhost_dev *dev,
> > + struct vhost_memory *mem)
> > {
> > - VhostUserMsg msg;
> > - VhostUserRequest msg_request;
> > - struct vhost_vring_file *file = 0;
> > - int need_reply = 0;
> > int fds[VHOST_MEMORY_MAX_NREGIONS];
> > int i, fd;
> > size_t fd_num = 0;
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_MEM_TABLE,
> > + .flags = VHOST_USER_VERSION,
> > + };
> >
> > - assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
> > + for (i = 0; i < dev->mem->nregions; ++i) {
> > + struct vhost_memory_region *reg = dev->mem->regions + i;
> > + ram_addr_t ram_addr;
> > +
> > + assert((uintptr_t)reg->userspace_addr == reg->userspace_addr);
> > + qemu_ram_addr_from_host((void *)(uintptr_t)reg->userspace_addr,
> > + &ram_addr);
> > + fd = qemu_get_ram_fd(ram_addr);
> > + if (fd > 0) {
> > + msg.memory.regions[fd_num].userspace_addr =
> > reg->userspace_addr;
> > + msg.memory.regions[fd_num].memory_size = reg->memory_size;
> > + msg.memory.regions[fd_num].guest_phys_addr =
> > reg->guest_phys_addr;
> > + msg.memory.regions[fd_num].mmap_offset = reg->userspace_addr -
> > + (uintptr_t) qemu_get_ram_block_host_ptr(ram_addr);
> > + assert(fd_num < VHOST_MEMORY_MAX_NREGIONS);
> > + fds[fd_num++] = fd;
> > + }
> > + }
> >
> > - msg_request = vhost_user_request_translate(request);
> > - msg.request = msg_request;
> > - msg.flags = VHOST_USER_VERSION;
> > - msg.size = 0;
> > + msg.memory.nregions = fd_num;
> >
> > - switch (msg_request) {
> > - case VHOST_USER_GET_FEATURES:
> > - need_reply = 1;
> > - break;
> > -
> > - case VHOST_USER_SET_FEATURES:
> > - case VHOST_USER_SET_LOG_BASE:
> > - msg.u64 = *((__u64 *) arg);
> > - msg.size = sizeof(m.u64);
> > - break;
> > -
> > - case VHOST_USER_SET_OWNER:
> > - case VHOST_USER_RESET_OWNER:
> > - break;
> > -
> > - case VHOST_USER_SET_MEM_TABLE:
> > - for (i = 0; i < dev->mem->nregions; ++i) {
> > - struct vhost_memory_region *reg = dev->mem->regions + i;
> > - ram_addr_t ram_addr;
> > -
> > - assert((uintptr_t)reg->userspace_addr == reg->userspace_addr);
> > - qemu_ram_addr_from_host((void
> > *)(uintptr_t)reg->userspace_addr, &ram_addr);
> > - fd = qemu_get_ram_fd(ram_addr);
> > - if (fd > 0) {
> > - msg.memory.regions[fd_num].userspace_addr =
> > reg->userspace_addr;
> > - msg.memory.regions[fd_num].memory_size =
> > reg->memory_size;
> > - msg.memory.regions[fd_num].guest_phys_addr =
> > reg->guest_phys_addr;
> > - msg.memory.regions[fd_num].mmap_offset =
> > reg->userspace_addr -
> > - (uintptr_t) qemu_get_ram_block_host_ptr(ram_addr);
> > - assert(fd_num < VHOST_MEMORY_MAX_NREGIONS);
> > - fds[fd_num++] = fd;
> > - }
> > - }
> > + if (!fd_num) {
> > + error_report("Failed initializing vhost-user memory map, "
> > + "consider using -object memory-backend-file
> > share=on");
> > + return -1;
> > + }
> >
> > - msg.memory.nregions = fd_num;
> > + msg.size = sizeof(m.memory.nregions);
> > + msg.size += sizeof(m.memory.padding);
> > + msg.size += fd_num * sizeof(VhostUserMemoryRegion);
> >
> > - if (!fd_num) {
> > - error_report("Failed initializing vhost-user memory map, "
> > - "consider using -object memory-backend-file
> > share=on");
> > - return -1;
> > - }
> > + vhost_user_write(dev, &msg, fds, fd_num);
> >
> > - msg.size = sizeof(m.memory.nregions);
> > - msg.size += sizeof(m.memory.padding);
> > - msg.size += fd_num * sizeof(VhostUserMemoryRegion);
> > -
> > - break;
> > -
> > - case VHOST_USER_SET_LOG_FD:
> > - fds[fd_num++] = *((int *) arg);
> > - break;
> > -
> > - case VHOST_USER_SET_VRING_NUM:
> > - case VHOST_USER_SET_VRING_BASE:
> > - memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
> > - msg.size = sizeof(m.state);
> > - break;
> > -
> > - case VHOST_USER_GET_VRING_BASE:
> > - memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
> > - msg.size = sizeof(m.state);
> > - need_reply = 1;
> > - break;
> > -
> > - case VHOST_USER_SET_VRING_ADDR:
> > - memcpy(&msg.addr, arg, sizeof(struct vhost_vring_addr));
> > - msg.size = sizeof(m.addr);
> > - break;
> > -
> > - case VHOST_USER_SET_VRING_KICK:
> > - case VHOST_USER_SET_VRING_CALL:
> > - case VHOST_USER_SET_VRING_ERR:
> > - file = arg;
> > - msg.u64 = file->index & VHOST_USER_VRING_IDX_MASK;
> > - msg.size = sizeof(m.u64);
> > - if (ioeventfd_enabled() && file->fd > 0) {
> > - fds[fd_num++] = file->fd;
> > - } else {
> > - msg.u64 |= VHOST_USER_VRING_NOFD_MASK;
> > - }
> > - break;
> > - default:
> > - error_report("vhost-user trying to send unhandled ioctl");
> > + return 0;
> > +}
> > +
> > +static int vhost_set_vring_addr(struct vhost_dev *dev,
> > + struct vhost_vring_addr *addr)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_VRING_ADDR,
> > + .flags = VHOST_USER_VERSION,
> > + .addr = *addr,
> > + .size = sizeof(*addr),
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_set_vring_endian(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + error_report("vhost-user trying to send unhandled ioctl");
> > + return -1;
> > +}
> > +
> > +static int vhost_set_vring_num(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_VRING_NUM,
> > + .flags = VHOST_USER_VERSION,
> > + .state = *ring,
> > + .size = sizeof(*ring),
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_set_vring_base(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_VRING_BASE,
> > + .flags = VHOST_USER_VERSION,
> > + .state = *ring,
> > + .size = sizeof(*ring),
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_get_vring_base(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_GET_VRING_BASE,
> > + .flags = VHOST_USER_VERSION,
> > + .state = *ring,
> > + .size = sizeof(*ring),
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + if (vhost_user_read(dev, &msg) < 0) {
> > + return 0;
> > + }
> > +
> > + if (msg.request != VHOST_USER_GET_VRING_BASE) {
> > + error_report("Received unexpected msg type. Expected %d received
> > %d",
> > + VHOST_USER_GET_FEATURES, msg.request);
> > return -1;
> > - break;
> > }
> >
> > - if (vhost_user_write(dev, &msg, fds, fd_num) < 0) {
> > - return 0;
> > + if (msg.size != sizeof(m.state)) {
> > + error_report("Received bad msg size.");
> > + return -1;
> > }
> >
> > - if (need_reply) {
> > - if (vhost_user_read(dev, &msg) < 0) {
> > - return 0;
> > - }
> > + *ring = msg.state;
> >
> > - if (msg_request != msg.request) {
> > - error_report("Received unexpected msg type."
> > - " Expected %d received %d", msg_request, msg.request);
> > - return -1;
> > - }
> > + return 0;
> > +}
> >
> > - switch (msg_request) {
> > - case VHOST_USER_GET_FEATURES:
> > - if (msg.size != sizeof(m.u64)) {
> > - error_report("Received bad msg size.");
> > - return -1;
> > - }
> > - *((__u64 *) arg) = msg.u64;
> > - break;
> > - case VHOST_USER_GET_VRING_BASE:
> > - if (msg.size != sizeof(m.state)) {
> > - error_report("Received bad msg size.");
> > - return -1;
> > - }
> > - memcpy(arg, &msg.state, sizeof(struct vhost_vring_state));
> > - break;
> > - default:
> > - error_report("Received unexpected msg type.");
> > - return -1;
> > - break;
> > - }
> > +static int vhost_set_vring_file(struct vhost_dev *dev,
> > + VhostUserRequest request,
> > + struct vhost_vring_file *file)
> > +{
> > + int fds[VHOST_MEMORY_MAX_NREGIONS];
> > + size_t fd_num = 0;
> > + VhostUserMsg msg = {
> > + .request = request,
> > + .flags = VHOST_USER_VERSION,
> > + .u64 = file->index & VHOST_USER_VRING_IDX_MASK,
> > + .size = sizeof(m.u64),
> > + };
> > +
> > + if (ioeventfd_enabled() && file->fd > 0) {
> > + fds[fd_num++] = file->fd;
> > + } else {
> > + msg.u64 |= VHOST_USER_VRING_NOFD_MASK;
> > }
> >
> > + vhost_user_write(dev, &msg, fds, fd_num);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_set_vring_kick(struct vhost_dev *dev,
> > + struct vhost_vring_file *file)
> > +{
> > + return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_KICK, file);
> > +}
> > +
> > +static int vhost_set_vring_call(struct vhost_dev *dev,
> > + struct vhost_vring_file *file)
> > +{
> > + return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_CALL, file);
> > +}
> > +
> > +static int vhost_set_features(struct vhost_dev *dev,
> > + uint64_t features)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_FEATURES,
> > + .flags = VHOST_USER_VERSION,
> > + .u64 = features,
> > + .size = sizeof(m.u64),
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_user_get_features(struct vhost_dev *dev,
> > + uint64_t *features)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_GET_FEATURES,
> > + .flags = VHOST_USER_VERSION,
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + if (vhost_user_read(dev, &msg) < 0) {
> > + return 0;
> > + }
> > +
> > + if (msg.request != VHOST_USER_GET_FEATURES) {
> > + error_report("Received unexpected msg type. Expected %d received
> > %d",
> > + VHOST_USER_GET_FEATURES, msg.request);
> > + return -1;
> > + }
> > +
> > + if (msg.size != sizeof(m.u64)) {
> > + error_report("Received bad msg size.");
> > + return -1;
> > + }
> > +
> > + *features = msg.u64;
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_set_owner(struct vhost_dev *dev)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_SET_OWNER,
> > + .flags = VHOST_USER_VERSION,
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > + return 0;
> > +}
> > +
> > +static int vhost_reset_owner(struct vhost_dev *dev)
> > +{
> > + VhostUserMsg msg = {
> > + .request = VHOST_USER_RESET_OWNER,
> > + .flags = VHOST_USER_VERSION,
> > + };
> > +
> > + vhost_user_write(dev, &msg, NULL, 0);
> > +
> > return 0;
> > }
> >
> > @@ -402,7 +535,24 @@ static int vhost_user_cleanup(struct vhost_dev *dev)
> >
> > const VhostOps user_ops = {
> > .backend_type = VHOST_BACKEND_TYPE_USER,
> > - .vhost_call = vhost_user_call,
> > .vhost_backend_init = vhost_user_init,
> > - .vhost_backend_cleanup = vhost_user_cleanup
> > - };
> > + .vhost_backend_cleanup = vhost_user_cleanup,
> > +
> > + .vhost_net_set_backend = vhost_net_set_backend,
> > + .vhost_scsi_set_endpoint = vhost_scsi_set_endpoint,
> > + .vhost_scsi_clear_endpoint = vhost_scsi_clear_endpoint,
> > + .vhost_scsi_get_abi_version = vhost_scsi_get_abi_version,
> > + .vhost_set_log_base = vhost_set_log_base,
> > + .vhost_set_mem_table = vhost_set_mem_table,
> > + .vhost_set_vring_addr = vhost_set_vring_addr,
> > + .vhost_set_vring_endian = vhost_set_vring_endian,
> > + .vhost_set_vring_num = vhost_set_vring_num,
> > + .vhost_set_vring_base = vhost_set_vring_base,
> > + .vhost_get_vring_base = vhost_get_vring_base,
> > + .vhost_set_vring_kick = vhost_set_vring_kick,
> > + .vhost_set_vring_call = vhost_set_vring_call,
> > + .vhost_set_features = vhost_set_features,
> > + .vhost_get_features = vhost_user_get_features,
> > + .vhost_set_owner = vhost_set_owner,
> > + .vhost_reset_owner = vhost_reset_owner,
> > +};
> > diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> > index 81209ba..83ef164 100644
> > --- a/hw/virtio/vhost.c
> > +++ b/hw/virtio/vhost.c
> > @@ -359,7 +359,7 @@ static inline void vhost_dev_log_resize(struct
> > vhost_dev* dev, uint64_t size)
> >
> > /* inform backend of log switching, this must be done before
> > releasing the current log, to ensure no logging is lost */
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base);
> > + r = dev->vhost_ops->vhost_set_log_base(dev, log_base);
> > assert(r >= 0);
> > vhost_log_put(dev, true);
> > dev->log = log;
> > @@ -525,7 +525,7 @@ static void vhost_commit(MemoryListener *listener)
> > }
> >
> > if (!dev->log_enabled) {
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_MEM_TABLE,
> > dev->mem);
> > + r = dev->vhost_ops->vhost_set_mem_table(dev, dev->mem);
> > assert(r >= 0);
> > dev->memory_changed = false;
> > return;
> > @@ -538,7 +538,7 @@ static void vhost_commit(MemoryListener *listener)
> > if (dev->log_size < log_size) {
> > vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER);
> > }
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_MEM_TABLE, dev->mem);
> > + r = dev->vhost_ops->vhost_set_mem_table(dev, dev->mem);
> > assert(r >= 0);
> > /* To log less, can only decrease log size after table update. */
> > if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
> > @@ -606,7 +606,7 @@ static int vhost_virtqueue_set_addr(struct vhost_dev
> > *dev,
> > .log_guest_addr = vq->used_phys,
> > .flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0,
> > };
> > - int r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_ADDR, &addr);
> > + int r = dev->vhost_ops->vhost_set_vring_addr(dev, &addr);
> > if (r < 0) {
> > return -errno;
> > }
> > @@ -620,7 +620,7 @@ static int vhost_dev_set_features(struct vhost_dev
> > *dev, bool enable_log)
> > if (enable_log) {
> > features |= 0x1ULL << VHOST_F_LOG_ALL;
> > }
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_FEATURES, &features);
> > + r = dev->vhost_ops->vhost_set_features(dev, features);
> > return r < 0 ? -errno : 0;
> > }
> >
> > @@ -725,7 +725,7 @@ static int
> > vhost_virtqueue_set_vring_endian_legacy(struct vhost_dev *dev,
> > .num = is_big_endian
> > };
> >
> > - if (!dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_ENDIAN, &s)) {
> > + if (!dev->vhost_ops->vhost_set_vring_endian(dev, &s)) {
> > return 0;
> > }
> >
> > @@ -756,13 +756,13 @@ static int vhost_virtqueue_start(struct vhost_dev
> > *dev,
> > assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
> >
> > vq->num = state.num = virtio_queue_get_num(vdev, idx);
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_NUM, &state);
> > + r = dev->vhost_ops->vhost_set_vring_num(dev, &state);
> > if (r) {
> > return -errno;
> > }
> >
> > state.num = virtio_queue_get_last_avail_idx(vdev, idx);
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_BASE, &state);
> > + r = dev->vhost_ops->vhost_set_vring_base(dev, &state);
> > if (r) {
> > return -errno;
> > }
> > @@ -814,7 +814,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
> > }
> >
> > file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq));
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_KICK, &file);
> > + r = dev->vhost_ops->vhost_set_vring_kick(dev, &file);
> > if (r) {
> > r = -errno;
> > goto fail_kick;
> > @@ -853,7 +853,7 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
> > };
> > int r;
> > assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_GET_VRING_BASE, &state);
> > + r = dev->vhost_ops->vhost_get_vring_base(dev, &state);
> > if (r < 0) {
> > fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
> > fflush(stderr);
> > @@ -909,7 +909,7 @@ static int vhost_virtqueue_init(struct vhost_dev *dev,
> > }
> >
> > file.fd = event_notifier_get_fd(&vq->masked_notifier);
> > - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_CALL, &file);
> > + r = dev->vhost_ops->vhost_set_vring_call(dev, &file);
> > if (r) {
> > r = -errno;
> > goto fail_call;
> > @@ -941,12 +941,12 @@ int vhost_dev_init(struct vhost_dev *hdev, void
> > *opaque,
> > return -errno;
> > }
> >
> > - r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_OWNER, NULL);
> > + r = hdev->vhost_ops->vhost_set_owner(hdev);
> > if (r < 0) {
> > goto fail;
> > }
> >
> > - r = hdev->vhost_ops->vhost_call(hdev, VHOST_GET_FEATURES, &features);
> > + r = hdev->vhost_ops->vhost_get_features(hdev, &features);
> > if (r < 0) {
> > goto fail;
> > }
> > @@ -1102,7 +1102,7 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev,
> > VirtIODevice *vdev, int n,
> > } else {
> > file.fd =
> > event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq));
> > }
> > - r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_VRING_CALL, &file);
> > + r = hdev->vhost_ops->vhost_set_vring_call(hdev, &file);
> > assert(r >= 0);
> > }
> >
> > @@ -1144,7 +1144,7 @@ int vhost_dev_start(struct vhost_dev *hdev,
> > VirtIODevice *vdev)
> > if (r < 0) {
> > goto fail_features;
> > }
> > - r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_MEM_TABLE, hdev->mem);
> > + r = hdev->vhost_ops->vhost_set_mem_table(hdev, hdev->mem);
> > if (r < 0) {
> > r = -errno;
> > goto fail_mem;
> > @@ -1166,8 +1166,8 @@ int vhost_dev_start(struct vhost_dev *hdev,
> > VirtIODevice *vdev)
> > hdev->log_size = vhost_get_log_size(hdev);
> > hdev->log = vhost_log_get(hdev->log_size, share);
> > log_base = (uintptr_t)hdev->log->log;
> > - r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE,
> > - hdev->log_size ? &log_base :
> > NULL);
> > + r = hdev->vhost_ops->vhost_set_log_base(hdev,
> > + hdev->log_size ? log_base
> > : 0);
> > if (r < 0) {
> > r = -errno;
> > goto fail_log;
> > diff --git a/include/hw/virtio/vhost-backend.h
> > b/include/hw/virtio/vhost-backend.h
> > index e472f29..42cfb87 100644
> > --- a/include/hw/virtio/vhost-backend.h
> > +++ b/include/hw/virtio/vhost-backend.h
> > @@ -19,17 +19,70 @@ typedef enum VhostBackendType {
> > } VhostBackendType;
> >
> > struct vhost_dev;
> > +struct vhost_memory;
> > +struct vhost_vring_file;
> > +struct vhost_vring_state;
> > +struct vhost_vring_addr;
> > +struct vhost_scsi_target;
> >
> > -typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int
> > request,
> > - void *arg);
> > typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
> > typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
> >
> > +typedef int (*vhost_net_set_backend_op)(struct vhost_dev *dev,
> > + struct vhost_vring_file *file);
> > +typedef int (*vhost_scsi_set_endpoint_op)(struct vhost_dev *dev,
> > + struct vhost_scsi_target
> > *target);
> > +typedef int (*vhost_scsi_clear_endpoint_op)(struct vhost_dev *dev,
> > + struct vhost_scsi_target
> > *target);
> > +typedef int (*vhost_scsi_get_abi_version_op)(struct vhost_dev *dev,
> > + int *version);
> > +typedef int (*vhost_set_log_base_op)(struct vhost_dev *dev, uint64_t
> > base);
> > +typedef int (*vhost_set_mem_table_op)(struct vhost_dev *dev,
> > + struct vhost_memory *mem);
> > +typedef int (*vhost_set_vring_addr_op)(struct vhost_dev *dev,
> > + struct vhost_vring_addr *addr);
> > +typedef int (*vhost_set_vring_endian_op)(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring);
> > +typedef int (*vhost_set_vring_num_op)(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring);
> > +typedef int (*vhost_set_vring_base_op)(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring);
> > +typedef int (*vhost_get_vring_base_op)(struct vhost_dev *dev,
> > + struct vhost_vring_state *ring);
> > +typedef int (*vhost_set_vring_kick_op)(struct vhost_dev *dev,
> > + struct vhost_vring_file *file);
> > +typedef int (*vhost_set_vring_call_op)(struct vhost_dev *dev,
> > + struct vhost_vring_file *file);
> > +typedef int (*vhost_set_features_op)(struct vhost_dev *dev,
> > + uint64_t features);
> > +typedef int (*vhost_get_features_op)(struct vhost_dev *dev,
> > + uint64_t *features);
> > +typedef int (*vhost_set_owner_op)(struct vhost_dev *dev);
> > +typedef int (*vhost_reset_owner_op)(struct vhost_dev *dev);
> > +
> > typedef struct VhostOps {
> > VhostBackendType backend_type;
> > - vhost_call vhost_call;
> > +
> > vhost_backend_init vhost_backend_init;
> > vhost_backend_cleanup vhost_backend_cleanup;
> > +
> > + vhost_net_set_backend_op vhost_net_set_backend;
> > + vhost_scsi_set_endpoint_op vhost_scsi_set_endpoint;
> > + vhost_scsi_clear_endpoint_op vhost_scsi_clear_endpoint;
> > + vhost_scsi_get_abi_version_op vhost_scsi_get_abi_version;
> > + vhost_set_log_base_op vhost_set_log_base;
> > + vhost_set_mem_table_op vhost_set_mem_table;
> > + vhost_set_vring_addr_op vhost_set_vring_addr;
> > + vhost_set_vring_endian_op vhost_set_vring_endian;
> > + vhost_set_vring_num_op vhost_set_vring_num;
> > + vhost_set_vring_base_op vhost_set_vring_base;
> > + vhost_get_vring_base_op vhost_get_vring_base;
> > + vhost_set_vring_kick_op vhost_set_vring_kick;
> > + vhost_set_vring_call_op vhost_set_vring_call;
> > + vhost_set_features_op vhost_set_features;
> > + vhost_get_features_op vhost_get_features;
> > + vhost_set_owner_op vhost_set_owner;
> > + vhost_reset_owner_op vhost_reset_owner;
> > } VhostOps;
> >
> > extern const VhostOps user_ops;
> > --
> > 2.4.3
>
[Qemu-devel] [PATCH v4 12/22] vhost: only use shared log if in use by backend, marcandre . lureau, 2015/09/19
[Qemu-devel] [PATCH v4 13/22] vhost-user: document migration log, marcandre . lureau, 2015/09/19
[Qemu-devel] [PATCH v4 14/22] net: add trace_vhost_user_event, marcandre . lureau, 2015/09/19