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

Pull networking changes from David Miller:

 1) GRE now works over ipv6, from Dmitry Kozlov.

 2) Make SCTP more network namespace aware, from Eric Biederman.

 3) TEAM driver now works with non-ethernet devices, from Jiri Pirko.

 4) Make openvswitch network namespace aware, from Pravin B Shelar.

 5) IPV6 NAT implementation, from Patrick McHardy.

 6) Server side support for TCP Fast Open, from Jerry Chu and others.

 7) Packet BPF filter supports MOD and XOR, from Eric Dumazet and Daniel
    Borkmann.

 8) Increate the loopback default MTU to 64K, from Eric Dumazet.

 9) Use a per-task rather than per-socket page fragment allocator for
    outgoing networking traffic.  This benefits processes that have very
    many mostly idle sockets, which is quite common.

    From Eric Dumazet.

10) Use up to 32K for page fragment allocations, with fallbacks to
    smaller sizes when higher order page allocations fail.  Benefits are
    a) less segments for driver to process b) less calls to page
    allocator c) less waste of space.

    From Eric Dumazet.

11) Allow GRO to be used on GRE tunnels, from Eric Dumazet.

12) VXLAN device driver, one way to handle VLAN issues such as the
    limitation of 4096 VLAN IDs yet still have some level of isolation.
    From Stephen Hemminger.

13) As usual there is a large boatload of driver changes, with the scale
    perhaps tilted towards the wireless side this time around.

Fix up various fairly trivial conflicts, mostly caused by the user
namespace changes.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1012 commits)
  hyperv: Add buffer for extended info after the RNDIS response message.
  hyperv: Report actual status in receive completion packet
  hyperv: Remove extra allocated space for recv_pkt_list elements
  hyperv: Fix page buffer handling in rndis_filter_send_request()
  hyperv: Fix the missing return value in rndis_filter_set_packet_filter()
  hyperv: Fix the max_xfer_size in RNDIS initialization
  vxlan: put UDP socket in correct namespace
  vxlan: Depend on CONFIG_INET
  sfc: Fix the reported priorities of different filter types
  sfc: Remove EFX_FILTER_FLAG_RX_OVERRIDE_IP
  sfc: Fix loopback self-test with separate_tx_channels=1
  sfc: Fix MCDI structure field lookup
  sfc: Add parentheses around use of bitfield macro arguments
  sfc: Fix null function pointer in efx_sriov_channel_type
  vxlan: virtual extensible lan
  igmp: export symbol ip_mc_leave_group
  netlink: add attributes to fdb interface
  tg3: unconditionally select HWMON support when tg3 is enabled.
  Revert "net: ti cpsw ethernet: allow reading phy interface mode from DT"
  gre: fix sparse warning
  ...

1 files changed, 45 insertions, 15 deletions

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 1e88a10..928148c 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -32,23 +32,31 @@
 #include "hyperv_net.h"
 
 
+#define RNDIS_EXT_LEN 100
 struct rndis_request {
 	struct list_head list_ent;
 	struct completion  wait_event;
 
+	struct rndis_message response_msg;
 	/*
-	 * FIXME: We assumed a fixed size response here. If we do ever need to
-	 * handle a bigger response, we can either define a max response
-	 * message or add a response buffer variable above this field
+	 * The buffer for extended info after the RNDIS response message. It's
+	 * referenced based on the data offset in the RNDIS message. Its size
+	 * is enough for current needs, and should be sufficient for the near
+	 * future.
 	 */
-	struct rndis_message response_msg;
+	u8 response_ext[RNDIS_EXT_LEN];
 
 	/* Simplify allocation by having a netvsc packet inline */
 	struct hv_netvsc_packet	pkt;
-	struct hv_page_buffer buf;
-	/* FIXME: We assumed a fixed size request here. */
+	/* Set 2 pages for rndis requests crossing page boundary */
+	struct hv_page_buffer buf[2];
+
 	struct rndis_message request_msg;
-	u8 ext[100];
+	/*
+	 * The buffer for the extended info after the RNDIS request message.
+	 * It is referenced and sized in a similar way as response_ext.
+	 */
+	u8 request_ext[RNDIS_EXT_LEN];
 };
 
 static void rndis_filter_send_completion(void *ctx);
@@ -221,6 +229,18 @@ static int rndis_filter_send_request(struct rndis_device *dev,
 	packet->page_buf[0].offset =
 		(unsigned long)&req->request_msg & (PAGE_SIZE - 1);
 
+	/* Add one page_buf when request_msg crossing page boundary */
+	if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
+		packet->page_buf_cnt++;
+		packet->page_buf[0].len = PAGE_SIZE -
+			packet->page_buf[0].offset;
+		packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
+			+ packet->page_buf[0].len) >> PAGE_SHIFT;
+		packet->page_buf[1].offset = 0;
+		packet->page_buf[1].len = req->request_msg.msg_len -
+			packet->page_buf[0].len;
+	}
+
 	packet->completion.send.send_completion_ctx = req;/* packet; */
 	packet->completion.send.send_completion =
 		rndis_filter_send_request_completion;
@@ -255,7 +275,8 @@ static void rndis_filter_receive_response(struct rndis_device *dev,
 	spin_unlock_irqrestore(&dev->request_lock, flags);
 
 	if (found) {
-		if (resp->msg_len <= sizeof(struct rndis_message)) {
+		if (resp->msg_len <=
+		    sizeof(struct rndis_message) + RNDIS_EXT_LEN) {
 			memcpy(&request->response_msg, resp,
 			       resp->msg_len);
 		} else {
@@ -392,9 +413,12 @@ int rndis_filter_receive(struct hv_device *dev,
 	struct rndis_device *rndis_dev;
 	struct rndis_message *rndis_msg;
 	struct net_device *ndev;
+	int ret = 0;
 
-	if (!net_dev)
-		return -EINVAL;
+	if (!net_dev) {
+		ret = -EINVAL;
+		goto exit;
+	}
 
 	ndev = net_dev->ndev;
 
@@ -402,14 +426,16 @@ int rndis_filter_receive(struct hv_device *dev,
 	if (!net_dev->extension) {
 		netdev_err(ndev, "got rndis message but no rndis device - "
 			  "dropping this message!\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto exit;
 	}
 
 	rndis_dev = (struct rndis_device *)net_dev->extension;
 	if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) {
 		netdev_err(ndev, "got rndis message but rndis device "
 			   "uninitialized...dropping this message!\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto exit;
 	}
 
 	rndis_msg = pkt->data;
@@ -441,7 +467,11 @@ int rndis_filter_receive(struct hv_device *dev,
 		break;
 	}
 
-	return 0;
+exit:
+	if (ret != 0)
+		pkt->status = NVSP_STAT_FAIL;
+
+	return ret;
 }
 
 static int rndis_filter_query_device(struct rndis_device *dev, u32 oid,
@@ -641,6 +671,7 @@ int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter)
 	if (t == 0) {
 		netdev_err(ndev,
 			"timeout before we got a set response...\n");
+		ret = -ETIMEDOUT;
 		/*
 		 * We can't deallocate the request since we may still receive a
 		 * send completion for it.
@@ -678,8 +709,7 @@ static int rndis_filter_init_device(struct rndis_device *dev)
 	init = &request->request_msg.msg.init_req;
 	init->major_ver = RNDIS_MAJOR_VERSION;
 	init->minor_ver = RNDIS_MINOR_VERSION;
-	/* FIXME: Use 1536 - rounded ethernet frame size */
-	init->max_xfer_size = 2048;
+	init->max_xfer_size = 0x4000;
 
 	dev->state = RNDIS_DEV_INITIALIZING;