linux.git/drivers/vhost/vsock.c, branch v4.12

mm: support __GFP_REPEAT in kvmalloc_node for >32kB

2017-05-09T00:15:12+00:00

vhost code uses __GFP_REPEAT when allocating vhost_virtqueue resp.
vhost_vsock because it would really like to prefer kmalloc to the
vmalloc fallback - see 23cc5a991c7a ("vhost-net: extend device
allocation to vmalloc") for more context.  Michael Tsirkin has also
noted:

 "__GFP_REPEAT overhead is during allocation time. Using vmalloc means
  all accesses are slowed down. Allocation is not on data path, accesses
  are."

The similar applies to other vhost_kvzalloc users.

Let's teach kvmalloc_node to handle __GFP_REPEAT properly.  There are
two things to be careful about.  First we should prevent from the OOM
killer and so have to involve __GFP_NORETRY by default and secondly
override __GFP_REPEAT for !costly order requests as the __GFP_REPEAT is
ignored for !costly orders.

Supporting __GFP_REPEAT like semantic for !costly request is possible it
would require changes in the page allocator.  This is out of scope of
this patch.

This patch shouldn't introduce any functional change.

Link: http://lkml.kernel.org/r/20170306103032.2540-3-mhocko@kernel.org
Signed-off-by: Michal Hocko 
Acked-by: Vlastimil Babka 
Acked-by: Michael S. Tsirkin 
Cc: David Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

VSOCK: Add virtio vsock vsockmon hooks

2017-04-24T16:35:56+00:00

The virtio drivers deal with struct virtio_vsock_pkt.  Add
virtio_transport_deliver_tap_pkt(pkt) for handing packets to the
vsockmon device.

We call virtio_transport_deliver_tap_pkt(pkt) from
net/vmw_vsock/virtio_transport.c and drivers/vhost/vsock.c instead of
common code.  This is because the drivers may drop packets before
handing them to common code - we still want to capture them.

Signed-off-by: Gerard Garcia 
Signed-off-by: Stefan Hajnoczi 
Reviewed-by: Jorgen Hansen 
Signed-off-by: David S. Miller

vhost-vsock: add pkt cancel capability

2017-03-21T21:41:46+00:00

To allow canceling all packets of a connection.

Reviewed-by: Stefan Hajnoczi 
Reviewed-by: Jorgen Hansen 
Signed-off-by: Peng Tao 
Signed-off-by: David S. Miller

vhost/vsock: handle vhost_vq_init_access() error

2017-01-24T22:33:10+00:00

Propagate the error when vhost_vq_init_access() fails and set
vq->private_data to NULL.

Signed-off-by: Stefan Hajnoczi 
Signed-off-by: Michael S. Tsirkin

vsock: lookup and setup guest_cid inside vhost_vsock_lock

2016-12-15T22:12:49+00:00

Multi vsocks may setup the same cid at the same time.

Signed-off-by: Gao feng 
Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Stefan Hajnoczi

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-12-10T21:21:55+00:00

vhost-vsock: fix orphan connection reset

2016-12-09T02:24:30+00:00

local_addr.svm_cid is host cid. We should check guest cid instead,
which is remote_addr.svm_cid. Otherwise we end up resetting all
connections to all guests.

Cc: stable@vger.kernel.org [4.8+]
Reviewed-by: Stefan Hajnoczi 
Signed-off-by: Peng Tao 
Signed-off-by: David S. Miller

vhost-vsock: remove unused vq variable

2016-12-08T16:26:46+00:00

Signed-off-by: Peng Tao 
Reviewed-by: Stefan Hajnoczi 
Signed-off-by: David S. Miller

vhost/vsock: fix vhost virtio_vsock_pkt use-after-free

2016-08-09T10:42:37+00:00

Stash the packet length in a local variable before handing over
ownership of the packet to virtio_transport_recv_pkt() or
virtio_transport_free_pkt().

This patch solves the use-after-free since pkt is no longer guaranteed
to be alive.

Reported-by: Dan Carpenter 
Signed-off-by: Stefan Hajnoczi 
Signed-off-by: Michael S. Tsirkin

VSOCK: Use kvfree()

2016-08-02T13:56:08+00:00

Use kvfree() instead of open-coding it.

Signed-off-by: Wei Yongjun 
Signed-off-by: Michael S. Tsirkin