From b1ad8496c9f47d8b545ed4e948ab4271627c8bcf Mon Sep 17 00:00:00 2001 From: Asias He Date: Mon, 6 May 2013 11:16:00 +0800 Subject: [PATCH] vhost-net: Free ubuf when vhost_dev_set_owner fails Signed-off-by: Asias He Signed-off-by: Michael S. Tsirkin --- drivers/vhost/net.c | 38 ++++++++++++++++++++++++++++++++------ 1 file changed, 32 insertions(+), 6 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index a3645bd163d8..354665a3ecd8 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -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; } -- 2.20.1