Hi Tiwei,
Thanks for your reply.
Yes, this new API currently is for vhost-user-blk in the SPDK project.
There is a patch in SPDK to use this API.
Thanks,
Feng Li
Tiwei Bie <tiwei....@intel.com> 于2019年12月4日周三 下午5:30写道：
>
> On Wed, Dec 04, 2019 at 01:13:20PM +0800, Li Feng wrote:
> > This msg is used to notify qemu that should get the config of backend.
> >
> > For example, vhost-user-blk uses this msg to notify guest os the
> > compacity of backend has changed.
> >
> > Signed-off-by: Li Feng <fen...@smartx.com>
> > ---
> > v2:
> > * Fix a little log typo.
> >
> > lib/librte_vhost/vhost_user.c | 31 +++++++++++++++++++++++++++++++
> > lib/librte_vhost/vhost_user.h | 2 ++
> > 2 files changed, 33 insertions(+)
> >
> > diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> > index 0cfb8b792..10f2e47d5 100644
> > --- a/lib/librte_vhost/vhost_user.c
> > +++ b/lib/librte_vhost/vhost_user.c
> > @@ -2840,6 +2840,37 @@ vhost_user_iotlb_miss(struct virtio_net *dev,
> > uint64_t iova, uint8_t perm)
> > return 0;
> > }
> >
> > +static int
> > +vhost_user_slave_config_change(struct virtio_net *dev)
> > +{
> > + int ret;
> > + struct VhostUserMsg msg = {
> > + .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
> > + .flags = VHOST_USER_VERSION,
> > + .size = 0,
> > + };
> > +
> > + ret = send_vhost_message(dev->slave_req_fd, &msg);
> > + if (ret < 0) {
> > + RTE_LOG(ERR, VHOST_CONFIG,
> > + "Failed to send config change (%d)\n",
> > + ret);
> > + return ret;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +int
> > +rte_vhost_user_slave_config_change(int vid)
> > +{
> > + struct virtio_net *dev;
> > + dev = get_device(vid);
> > + if (!dev)
> > + return -ENODEV;
> > + return vhost_user_slave_config_change(dev);
> > +}
> > +
> > static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
> > int index, int fd,
> > uint64_t offset,
> > diff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h
> > index 6563f7315..5c1bb2138 100644
> > --- a/lib/librte_vhost/vhost_user.h
> > +++ b/lib/librte_vhost/vhost_user.h
> > @@ -62,6 +62,7 @@ typedef enum VhostUserRequest {
> > typedef enum VhostUserSlaveRequest {
> > VHOST_USER_SLAVE_NONE = 0,
> > VHOST_USER_SLAVE_IOTLB_MSG = 1,
> > + VHOST_USER_SLAVE_CONFIG_CHANGE_MSG = 2,
> > VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG = 3,
> > VHOST_USER_SLAVE_MAX
> > } VhostUserSlaveRequest;
> > @@ -158,6 +159,7 @@ typedef struct VhostUserMsg {
> > /* vhost_user.c */
> > int vhost_user_msg_handler(int vid, int fd);
> > int vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t
> > perm);
> > +int rte_vhost_user_slave_config_change(int vid);
>
> This is supposed to be an API for external backends?
>
> Thanks,
> Tiwei
>
> >
> > /* socket.c */
> > int read_fd_message(int sockfd, char *buf, int buflen, int *fds, int
> > max_fds,
> > --
> > 2.11.0
> >
> >
> > --
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> > that is not related to the business is not authorized or permitted by
> > SmartX.
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> >
> >
--
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that is not related to the business is not authorized or permitted by
SmartX.
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