diff options
Diffstat (limited to '')
-rw-r--r-- | net/vmw_vsock/hyperv_transport.c | 46 |
1 files changed, 36 insertions, 10 deletions
diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c index 19189cf30a72..59c3e2697069 100644 --- a/net/vmw_vsock/hyperv_transport.c +++ b/net/vmw_vsock/hyperv_transport.c @@ -78,6 +78,9 @@ struct hvs_send_buf { ALIGN((payload_len), 8) + \ VMBUS_PKT_TRAILER_SIZE) +/* Upper bound on the size of a VMbus packet for hv_sock */ +#define HVS_MAX_PKT_SIZE HVS_PKT_LEN(HVS_MTU_SIZE) + union hvs_service_id { guid_t srv_id; @@ -225,14 +228,20 @@ static size_t hvs_channel_writable_bytes(struct vmbus_channel *chan) return round_down(ret, 8); } +static int __hvs_send_data(struct vmbus_channel *chan, + struct vmpipe_proto_header *hdr, + size_t to_write) +{ + hdr->pkt_type = 1; + hdr->data_size = to_write; + return vmbus_sendpacket(chan, hdr, sizeof(*hdr) + to_write, + 0, VM_PKT_DATA_INBAND, 0); +} + static int hvs_send_data(struct vmbus_channel *chan, struct hvs_send_buf *send_buf, size_t to_write) { - send_buf->hdr.pkt_type = 1; - send_buf->hdr.data_size = to_write; - return vmbus_sendpacket(chan, &send_buf->hdr, - sizeof(send_buf->hdr) + to_write, - 0, VM_PKT_DATA_INBAND, 0); + return __hvs_send_data(chan, &send_buf->hdr, to_write); } static void hvs_channel_cb(void *ctx) @@ -372,6 +381,8 @@ static void hvs_open_connection(struct vmbus_channel *chan) rcvbuf = ALIGN(rcvbuf, HV_HYP_PAGE_SIZE); } + chan->max_pkt_size = HVS_MAX_PKT_SIZE; + ret = vmbus_open(chan, sndbuf, rcvbuf, NULL, 0, hvs_channel_cb, conn_from_host ? new : sk); if (ret != 0) { @@ -468,7 +479,7 @@ static void hvs_shutdown_lock_held(struct hvsock *hvs, int mode) return; /* It can't fail: see hvs_channel_writable_bytes(). */ - (void)hvs_send_data(hvs->chan, (struct hvs_send_buf *)&hdr, 0); + (void)__hvs_send_data(hvs->chan, &hdr, 0); hvs->fin_sent = true; } @@ -566,12 +577,18 @@ static bool hvs_dgram_allow(u32 cid, u32 port) static int hvs_update_recv_data(struct hvsock *hvs) { struct hvs_recv_buf *recv_buf; - u32 payload_len; + u32 pkt_len, payload_len; + + pkt_len = hv_pkt_len(hvs->recv_desc); + + if (pkt_len < HVS_HEADER_LEN) + return -EIO; recv_buf = (struct hvs_recv_buf *)(hvs->recv_desc + 1); payload_len = recv_buf->hdr.data_size; - if (payload_len > HVS_MTU_SIZE) + if (payload_len > pkt_len - HVS_HEADER_LEN || + payload_len > HVS_MTU_SIZE) return -EIO; if (payload_len == 0) @@ -596,7 +613,9 @@ static ssize_t hvs_stream_dequeue(struct vsock_sock *vsk, struct msghdr *msg, return -EOPNOTSUPP; if (need_refill) { - hvs->recv_desc = hv_pkt_iter_first_raw(hvs->chan); + hvs->recv_desc = hv_pkt_iter_first(hvs->chan); + if (!hvs->recv_desc) + return -ENOBUFS; ret = hvs_update_recv_data(hvs); if (ret) return ret; @@ -610,7 +629,7 @@ static ssize_t hvs_stream_dequeue(struct vsock_sock *vsk, struct msghdr *msg, hvs->recv_data_len -= to_read; if (hvs->recv_data_len == 0) { - hvs->recv_desc = hv_pkt_iter_next_raw(hvs->chan, hvs->recv_desc); + hvs->recv_desc = hv_pkt_iter_next(hvs->chan, hvs->recv_desc); if (hvs->recv_desc) { ret = hvs_update_recv_data(hvs); if (ret) @@ -796,6 +815,12 @@ int hvs_notify_send_post_enqueue(struct vsock_sock *vsk, ssize_t written, return 0; } +static +int hvs_set_rcvlowat(struct vsock_sock *vsk, int val) +{ + return -EOPNOTSUPP; +} + static struct vsock_transport hvs_transport = { .module = THIS_MODULE, @@ -831,6 +856,7 @@ static struct vsock_transport hvs_transport = { .notify_send_pre_enqueue = hvs_notify_send_pre_enqueue, .notify_send_post_enqueue = hvs_notify_send_post_enqueue, + .set_rcvlowat = hvs_set_rcvlowat }; static bool hvs_check_transport(struct vsock_sock *vsk) |