[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20190717105255.63488-13-jasowang@redhat.com>
Date: Wed, 17 Jul 2019 06:52:52 -0400
From: Jason Wang <jasowang@...hat.com>
To: mst@...hat.com, jasowang@...hat.com
Cc: kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
jfreimann@...hat.com, tiwei.bie@...el.com,
maxime.coquelin@...hat.com
Subject: [PATCH V3 12/15] vhost: vhost_put_user() can accept metadata type
We assumes used ring update is the only user for vhost_put_user() in
the past. This may not be the case for the incoming packed ring which
may update the descriptor ring for used. So introduce a new type
parameter.
Signed-off-by: Jason Wang <jasowang@...hat.com>
---
drivers/vhost/vhost.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 6044cdea124f..3fa1adf2cb90 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1178,7 +1178,7 @@ static inline void __user *__vhost_get_user(struct vhost_virtqueue *vq,
return __vhost_get_user_slow(vq, addr, size, type);
}
-#define vhost_put_user(vq, x, ptr) \
+#define vhost_put_user(vq, x, ptr, type) \
({ \
int ret = -EFAULT; \
if (!vq->iotlb) { \
@@ -1186,7 +1186,7 @@ static inline void __user *__vhost_get_user(struct vhost_virtqueue *vq,
} else { \
__typeof__(ptr) to = \
(__typeof__(ptr)) __vhost_get_user(vq, ptr, \
- sizeof(*ptr), VHOST_ADDR_USED); \
+ sizeof(*ptr), type); \
if (to != NULL) \
ret = __put_user(x, to); \
else \
@@ -1230,7 +1230,7 @@ static inline int vhost_put_avail_event(struct vhost_virtqueue *vq)
#endif
return vhost_put_user(vq, cpu_to_vhost16(vq, vq->avail_idx),
- vhost_avail_event(vq));
+ vhost_avail_event(vq), VHOST_ADDR_USED);
}
static inline int vhost_put_used(struct vhost_virtqueue *vq,
@@ -1267,7 +1267,7 @@ static inline int vhost_put_used_flags(struct vhost_virtqueue *vq)
#endif
return vhost_put_user(vq, cpu_to_vhost16(vq, vq->used_flags),
- &vq->used->flags);
+ &vq->used->flags, VHOST_ADDR_USED);
}
static inline int vhost_put_used_idx(struct vhost_virtqueue *vq)
@@ -1284,7 +1284,7 @@ static inline int vhost_put_used_idx(struct vhost_virtqueue *vq)
#endif
return vhost_put_user(vq, cpu_to_vhost16(vq, vq->last_used_idx),
- &vq->used->idx);
+ &vq->used->idx, VHOST_ADDR_USED);
}
#define vhost_get_user(vq, x, ptr, type) \
--
2.18.1
Powered by blists - more mailing lists