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vhost-net: Free ubuf when vhost_dev_set_owner fails 

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Asias He 2013-05-06 11:16:00 +08:00 committed by Michael S. Tsirkin
parent 54db63c2ca
commit b1ad8496c9
1 changed files with 32 additions and 6 deletions
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38
drivers/vhost/net.c
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@ -146,6 +146,19 @@ void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *ubufs)
kfree(ubufs);
}
static void vhost_net_clear_ubuf_info(struct vhost_net *n)
{
bool zcopy;
int i;
for (i = 0; i < n->dev.nvqs; ++i) {
zcopy = vhost_zcopy_mask & (0x1 << i);
if (zcopy)
kfree(n->vqs[i].ubuf_info);
}
}
int vhost_net_set_ubuf_info(struct vhost_net *n)
{
bool zcopy;
@ -1027,6 +1040,23 @@ static int vhost_net_set_features(struct vhost_net *n, u64 features)
return 0;
}
static long vhost_net_set_owner(struct vhost_net *n)
{
int r;
mutex_lock(&n->dev.mutex);
r = vhost_net_set_ubuf_info(n);
if (r)
goto out;
r = vhost_dev_set_owner(&n->dev);
if (r)
vhost_net_clear_ubuf_info(n);
vhost_net_flush(n);
out:
mutex_unlock(&n->dev.mutex);
return r;
}
static long vhost_net_ioctl(struct file *f, unsigned int ioctl,
unsigned long arg)
{
@ -1055,19 +1085,15 @@ static long vhost_net_ioctl(struct file *f, unsigned int ioctl,
return vhost_net_set_features(n, features);
case VHOST_RESET_OWNER:
return vhost_net_reset_owner(n);
case VHOST_SET_OWNER:
return vhost_net_set_owner(n);
default:
mutex_lock(&n->dev.mutex);
if (ioctl == VHOST_SET_OWNER) {
r = vhost_net_set_ubuf_info(n);
if (r)
goto out;
}
r = vhost_dev_ioctl(&n->dev, ioctl, argp);
if (r == -ENOIOCTLCMD)
r = vhost_vring_ioctl(&n->dev, ioctl, argp);
else
vhost_net_flush(n);
out:
mutex_unlock(&n->dev.mutex);
return r;
}