lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <CACGkMEsNfLOQkmnWUH53iTptAmhELs_U8B4D-CfO49rs=+HfLw@mail.gmail.com> Date: Sun, 8 Oct 2023 13:17:23 +0800 From: Jason Wang <jasowang@...hat.com> To: Maxime Coquelin <maxime.coquelin@...hat.com> Cc: Cindy Lu <lulu@...hat.com>, mst@...hat.com, xieyongji@...edance.com, kvm@...r.kernel.org, linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, stable@...r.kernel.org Subject: Re: [RFC v2 3/4] vduse: update the vq_info in ioctl On Fri, Sep 29, 2023 at 5:12 PM Maxime Coquelin <maxime.coquelin@...hat.com> wrote: > > > > On 9/12/23 09:39, Jason Wang wrote: > > On Tue, Sep 12, 2023 at 11:00 AM Cindy Lu <lulu@...hat.com> wrote: > >> > >> In VDUSE_VQ_GET_INFO, the driver will sync the last_avail_idx > >> with reconnect info, After mapping the reconnect pages to userspace > >> The userspace App will update the reconnect_time in > >> struct vhost_reconnect_vring, If this is not 0 then it means this > >> vq is reconnected and will update the last_avail_idx > >> > >> Signed-off-by: Cindy Lu <lulu@...hat.com> > >> --- > >> drivers/vdpa/vdpa_user/vduse_dev.c | 13 +++++++++++++ > >> include/uapi/linux/vduse.h | 6 ++++++ > >> 2 files changed, 19 insertions(+) > >> > >> diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c > >> index 2c69f4004a6e..680b23dbdde2 100644 > >> --- a/drivers/vdpa/vdpa_user/vduse_dev.c > >> +++ b/drivers/vdpa/vdpa_user/vduse_dev.c > >> @@ -1221,6 +1221,8 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, > >> struct vduse_vq_info vq_info; > >> struct vduse_virtqueue *vq; > >> u32 index; > >> + struct vdpa_reconnect_info *area; > >> + struct vhost_reconnect_vring *vq_reconnect; > >> > >> ret = -EFAULT; > >> if (copy_from_user(&vq_info, argp, sizeof(vq_info))) > >> @@ -1252,6 +1254,17 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd, > >> > >> vq_info.ready = vq->ready; > >> > >> + area = &vq->reconnect_info; > >> + > >> + vq_reconnect = (struct vhost_reconnect_vring *)area->vaddr; > >> + /*check if the vq is reconnect, if yes then update the last_avail_idx*/ > >> + if ((vq_reconnect->last_avail_idx != > >> + vq_info.split.avail_index) && > >> + (vq_reconnect->reconnect_time != 0)) { > >> + vq_info.split.avail_index = > >> + vq_reconnect->last_avail_idx; > >> + } > >> + > >> ret = -EFAULT; > >> if (copy_to_user(argp, &vq_info, sizeof(vq_info))) > >> break; > >> diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h > >> index 11bd48c72c6c..d585425803fd 100644 > >> --- a/include/uapi/linux/vduse.h > >> +++ b/include/uapi/linux/vduse.h > >> @@ -350,4 +350,10 @@ struct vduse_dev_response { > >> }; > >> }; > >> > >> +struct vhost_reconnect_vring { > >> + __u16 reconnect_time; > >> + __u16 last_avail_idx; > >> + _Bool avail_wrap_counter; > > > > Please add a comment for each field. > > > > And I never saw _Bool is used in uapi before, maybe it's better to > > pack it with last_avail_idx into a __u32. > > Better as two distincts __u16 IMHO. Fine with me. Thanks > > Thanks, > Maxime > > > > > Btw, do we need to track inflight descriptors as well? > > > > Thanks > > > >> +}; > >> + > >> #endif /* _UAPI_VDUSE_H_ */ > >> -- > >> 2.34.3 > >> > > >
Powered by blists - more mailing lists