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2014-12-23hyperv: Fix some variable name typos in send-buffer init/revokeHaiyang Zhang2-7/+9
The changed names are union fields with the same size, so the existing code still works. But, we now update these variables to the correct names. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-09hyperv: Add support for vNIC hot removalHaiyang Zhang2-0/+6
This patch adds proper handling of the vNIC hot removal event, which includes a rescind-channel-offer message from the host side that triggers vNIC close and removal. In this case, the notices to the host during close and removal is not necessary because the channel is rescinded. This patch blocks these unnecessary messages, and lets vNIC removal process complete normally. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-26net: Hyper-V: Deletion of an unnecessary check before the function call "vfree"Markus Elfring1-3/+1
The vfree() function performs also input parameter validation. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-13hyperv: Add processing of MTU reduced by the hostHaiyang Zhang3-3/+14
If the host uses packet encapsulation feature, the MTU may be reduced by the host due to headroom reservation for encapsulation. This patch handles this new MTU value. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-30hyperv: Add IPv6 into the hash computation for vRSSHaiyang Zhang2-2/+5
This will allow the workload spreading via vRSS for IPv6. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-23hyperv: Fix the total_data_buflen in send pathHaiyang Zhang1-0/+1
total_data_buflen is used by netvsc_send() to decide if a packet can be put into send buffer. It should also include the size of RNDIS message before the Ethernet frame. Otherwise, a messge with total size bigger than send_section_size may be copied into the send buffer, and cause data corruption. [Request to include this patch to the Stable branches] Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-18hyperv: Add handling of IP header with option field in netvsc_set_hash()Haiyang Zhang1-16/+10
In case that the IP header has optional field at the end, this patch will get the port numbers after that field, and compute the hash. The general parser skb_flow_dissect() is used here. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-7/+8
2014-10-06hyperv: Fix a bug in netvsc_send()KY Srinivasan1-7/+8
After the packet is successfully sent, we should not touch the packet as it may have been freed. This patch is based on the work done by Long Li <longli@microsoft.com>. David, please queue this up for stable. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reported-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+2
Conflicts: drivers/net/usb/r8152.c net/netfilter/nfnetlink.c Both r8152 and nfnetlink conflicts were simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-30hyperv: Fix a bug in netvsc_start_xmit()KY Srinivasan1-1/+2
After the packet is successfully sent, we should not touch the skb as it may have been freed. This patch is based on the work done by Long Li <longli@microsoft.com>. In this version of the patch I have fixed issues pointed out by David. David, please queue this up for stable. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Tested-by: Long Li <longli@microsoft.com> Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-06hyperv: NULL dereference on errorDan Carpenter1-4/+2
We try to call free_netvsc_device(net_device) when "net_device" is NULL. It leads to an Oops. Fixes: f90251c8a6d0 ('hyperv: Increase the buffer length for netvsc_channel_cb()') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-22hyperv: Increase the buffer length for netvsc_channel_cb()Haiyang Zhang2-4/+16
When the buffer is too small for a packet from VMBus, a bigger buffer will be allocated in netvsc_channel_cb() and retry reading the packet from VMBus. Increasing this buffer size will reduce the retry overhead. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-07hyperv: Adjust the size of sendbuf region to support ws2008r2KY Srinivasan1-1/+1
WS2008R2 is a supported platform and it turns out that the maximum sendbuf size that ws2008R2 can support is only 15MB. Make the necessary adjustment. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-05Drivers: net-next: hyperv: Increase the size of the sendbuf regionKY Srinivasan2-6/+3
Intel did some benchmarking on our network throughput when Linux on Hyper-V is as used as a gateway. This fix gave us almost a 1 Gbps additional throughput on about 5Gbps base throughput we hadi, prior to increasing the sendbuf size. The sendbuf mechanism is a copy based transport that we have which is clearly more optimal than the copy-free page flipping mechanism (for small packets). In the forwarding scenario, we deal only with MTU sized packets, and increasing the size of the senbuf area gave us the additional performance. For what it is worth, Windows guests on Hyper-V, I am told use similar sendbuf size as well. The exact value of sendbuf I think is less important than the fact that it needs to be larger than what Linux can allocate as physically contiguous memory. Thus the change over to allocating via vmalloc(). We currently allocate 16MB receive buffer and we use vmalloc there for allocation. Also the low level channel code has already been modified to deal with physically dis-contiguous memory in the ringbuffer setup. Based on experimentation Intel did, they say there was some improvement in throughput as the sendbuf size was increased up to 16MB and there was no effect on throughput beyond 16MB. Thus I have chosen 16MB here. Increasing the sendbuf value makes a material difference in small packet handling In this version of the patch, based on David's feedback, I have added additional details in the commit log. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-31Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+3
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-24hyperv: Fix error return code in netvsc_init_buf()Wei Yongjun1-1/+3
Fix to return -ENOMEM from the kalloc error handling case instead of 0. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-10hyperv: Add netpoll supportRichard Weinberger1-0/+11
In order to have at least a netconsole to debug kernel issues on Windows Azure this patch implements netpoll support. Sending packets is easy, netvsc_start_xmit() does already everything needed. Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-03drivers/net/hyperv/netvsc.c: remove unnecessary null test before kfreeFabian Frederick1-3/+1
Fix checkpatch warning: WARNING: kfree(NULL) is safe this check is probably not required Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: netdev@vger.kernel.org Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
2014-06-20hyperv: Add handler for RNDIS_STATUS_NETWORK_CHANGE eventHaiyang Zhang3-25/+29
The RNDIS_STATUS_NETWORK_CHANGE event is received after the Hyper-V host sleep or hibernation. We refresh network at this time. MS-TFS: 135162 Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-17hyperv: fix apparent cut-n-paste error in send path teardownDave Jones1-1/+1
c25aaf814a63: "hyperv: Enable sendbuf mechanism on the send path" added some teardown code that looks like it was copied from the recieve path above, but missed a variable name replacement. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-23hyperv: Add hash value into RNDIS Per-packet infoHaiyang Zhang2-4/+18
It passes the hash value as the RNDIS Per-packet info to the Hyper-V host, so that the send completion notices can be spread across multiple channels. MS-TFS: 140273 Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-14net: get rid of SET_ETHTOOL_OPSWilfried Klaebe1-1/+1
net: get rid of SET_ETHTOOL_OPS Dave Miller mentioned he'd like to see SET_ETHTOOL_OPS gone. This does that. Mostly done via coccinelle script: @@ struct ethtool_ops *ops; struct net_device *dev; @@ - SET_ETHTOOL_OPS(dev, ops); + dev->ethtool_ops = ops; Compile tested only, but I'd seriously wonder if this broke anything. Suggested-by: Dave Miller <davem@davemloft.net> Signed-off-by: Wilfried Klaebe <w-lkml@lebenslange-mailadresse.de> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-0/+4
Conflicts: drivers/net/ethernet/altera/altera_sgdma.c net/netlink/af_netlink.c net/sched/cls_api.c net/sched/sch_api.c The netlink conflict dealt with moving to netlink_capable() and netlink_ns_capable() in the 'net' tree vs. supporting 'tc' operations in non-init namespaces. These were simple transformations from netlink_capable to netlink_ns_capable. The Altera driver conflict was simply code removal overlapping some void pointer cast cleanups in net-next. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-12Add support for netvsc build without CONFIG_SYSFS flagHaiyang Zhang1-4/+1
This change ensures the driver can be built successfully without the CONFIG_SYSFS flag. MS-TFS: 182270 Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-01hyperv: Properly handle checksum offloadKY Srinivasan1-0/+4
Do checksum offload only if the client of the driver wants checksum to be offloaded. In V1 version of this patch, I addressed comments from Stephen Hemminger <stephen@networkplumber.org> and Eric Dumazet <eric.dumazet@gmail.com>. In this version of the patch I have addressed comments from David Miller. This patch fixes a bug that is exposed in gateway scenarios. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-30hyperv: Enable sendbuf mechanism on the send pathKY Srinivasan3-9/+234
We send packets using a copy-free mechanism (this is the Guest to Host transport via VMBUS). While this is obviously optimal for large packets, it may not be optimal for small packets. Hyper-V host supports a second mechanism for sending packets that is "copy based". We implement that mechanism in this patch. In this version of the patch I have addressed a comment from David Miller. With this patch (and all of the other offload and VRSS patches), we are now able to almost saturate a 10G interface between Linux VMs on Hyper-V on different hosts - close to 9 Gbps as measured via iperf. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-23hyperv: Simplify the send_completion variablesHaiyang Zhang4-16/+11
The union contains only one member now, so we use the variables in it directly. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-23hyperv: Remove recv_pkt_list and lockHaiyang Zhang4-198/+13
Removed recv_pkt_list and lock, and updated related code, so that the locking overhead is reduced especially when multiple channels are in use. The recv_pkt_list isn't actually necessary because the packets are processed sequentially in each channel. It has been replaced by a local variable, and the related lock for this list is also removed. The is_data_pkt field is not used in receive path, so its assignment is cleaned up. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-21hyperv: Add support for virtual Receive Side Scaling (vRSS)Haiyang Zhang4-34/+504
This feature allows multiple channels to be used by each virtual NIC. It is available on Hyper-V host 2012 R2. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11Drivers: net: hyperv: Address UDP checksum issuesKY Srinivasan3-2/+37
ws2008r2 does not support UDP checksum offload. Thus, we cannnot turn on UDP offload in the host. Also, on ws2012 and ws2012 r2, there appear to be an issue with UDP checksum offload. Fix this issue by computing the UDP checksum in the Hyper-V driver. Based on Dave Miller's comments, in this version, I have COWed the skb before modifying the UDP header (the checksum field). Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11Drivers: net: hyperv: Negotiate suitable ndis version for offload supportKY Srinivasan1-1/+1
Ws2008R2 supports ndis_version 6.1 and 6.1 is the minimal version required for various offloads. Negotiate ndis_version 6.1 when on ws2008r2. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11Drivers: net: hyperv: Allocate memory for all possible per-pecket informationKY Srinivasan1-1/+3
An outgoing packet can potentially need per-packet information for all the offloads and VLAN tagging. Fix this issue. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2-1/+24
Conflicts: drivers/net/usb/r8152.c drivers/net/xen-netback/netback.c Both the r8152 and netback conflicts were simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-11hyperv: Change the receive buffer size for legacy hostsHaiyang Zhang2-1/+6
Due to a bug in the Hyper-V host verion 2008R2, we need to use a slightly smaller receive buffer size, otherwise the buffer will not be accepted by the legacy hosts. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10Drivers: net: hyperv: Enable large send offloadKY Srinivasan2-4/+74
Enable segmentation offload. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10Drivers: net: hyperv: Enable send side checksum offloadKY Srinivasan2-2/+77
Enable send side checksum offload. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10Drivers: net: hyperv: Enable receive side IP checksum offloadKY Srinivasan3-6/+50
Enable receive side checksum offload. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10Drivers: net: hyperv: Enable offloads on the hostKY Srinivasan2-0/+135
Prior to enabling guest side offloads, enable the offloads on the host. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10Drivers: net: hyperv: Cleanup the send pathKY Srinivasan3-90/+71
In preparation for enabling offloads, cleanup the send path. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-10Drivers: net: hyperv: Enable scatter gather I/OKY Srinivasan1-39/+114
Cleanup the code and enable scatter gather I/O. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-06hyperv: Move state setting for link queryHaiyang Zhang2-1/+24
It moves the state setting for query into rndis_filter_receive_response(). All callbacks including query-complete and status-callback are synchronized by channel->inbound_lock. This prevents pentential race between them. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-20hyperv: Add latest NetVSP versions to auto negotiationHaiyang Zhang3-10/+70
It auto negotiates the highest NetVSP version supported by both guest and host. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-15/+38
Conflicts: drivers/net/bonding/bond_3ad.h drivers/net/bonding/bond_main.c Two minor conflicts in bonding, both of which were overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-18Drivers: net: hyperv: Cleanup the netvsc receive callback functioKY Srinivasan2-23/+12
Get rid of the buffer allocation in the receive path for normal packets. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-18Drivers: net: hyperv: Cleanup the receive pathKY Srinivasan1-16/+13
Make the receive path a little more efficient by parameterizing the required state rather than re-establishing that state. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-18Drivers: net: hyperv: Get rid of the rndis_filter_packet structureKY Srinivasan3-45/+4
This structure is redundant; get rid of it make the code little more efficient - get rid of the unnecessary indirection. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-17hyperv: Fix the carrier status settingHaiyang Zhang1-15/+38
Without this patch, the "cat /sys/class/net/ethN/operstate" shows "unknown", and "ethtool ethN" shows "Link detected: yes", when VM boots up with or without vNIC connected. This patch fixed the problem. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-28hyperv: Add support for physically discontinuous receive bufferHaiyang Zhang2-6/+3
This will allow us to use bigger receive buffer, and prevent allocation failure due to fragmented memory. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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