> -----Original Message-----
> From: Paul Durrant [mailto:paul.durr...@citrix.com]
> Sent: 11 May 2016 16:16
> To: xen-de...@lists.xenproject.org; net...@vger.kernel.org
> Cc: Paul Durrant; Wei Liu
> Subject: [PATCH net-next v2 2/4] xen-netback: add control protocol
> implementation
>
> My recent patch to include/xen/interface/io/netif.h defines a new shared
> ring (in addition to the rx and tx rings) for passing control messages
> from a VM frontend driver to a backend driver.
>
> A previous patch added the necessary boilerplate for mapping the control
> ring from the frontend, should it be created. This patch adds
> implementations for each of the defined protocol messages.
>
> Signed-off-by: Paul Durrant <paul.durr...@citrix.com>
> Cc: Wei Liu <wei.l...@citrix.com>
> ---
>
> v2:
> - Use RCU list for hash cache
> ---
> drivers/net/xen-netback/Makefile | 2 +-
> drivers/net/xen-netback/common.h | 46 +++++
> drivers/net/xen-netback/hash.c | 386
> ++++++++++++++++++++++++++++++++++++
> drivers/net/xen-netback/interface.c | 28 ++-
> drivers/net/xen-netback/netback.c | 49 ++++-
> 5 files changed, 506 insertions(+), 5 deletions(-)
> create mode 100644 drivers/net/xen-netback/hash.c
>
> diff --git a/drivers/net/xen-netback/Makefile b/drivers/net/xen-
> netback/Makefile
> index e346e81..11e02be 100644
> --- a/drivers/net/xen-netback/Makefile
> +++ b/drivers/net/xen-netback/Makefile
> @@ -1,3 +1,3 @@
> obj-$(CONFIG_XEN_NETDEV_BACKEND) := xen-netback.o
>
> -xen-netback-y := netback.o xenbus.o interface.o
> +xen-netback-y := netback.o xenbus.o interface.o hash.o
> diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-
> netback/common.h
> index 093a12a..84d6cbd 100644
> --- a/drivers/net/xen-netback/common.h
> +++ b/drivers/net/xen-netback/common.h
> @@ -220,6 +220,35 @@ struct xenvif_mcast_addr {
>
> #define XEN_NETBK_MCAST_MAX 64
>
> +#define XEN_NETBK_MAX_HASH_KEY_SIZE 40
> +#define XEN_NETBK_MAX_HASH_MAPPING_SIZE 128
> +#define XEN_NETBK_HASH_TAG_SIZE 40
> +
> +struct xenvif_hash_cache_entry {
> + struct list_head link;
> + struct rcu_head rcu;
> + u8 tag[XEN_NETBK_HASH_TAG_SIZE];
> + unsigned int len;
> + u32 val;
> + int seq;
> +};
> +
> +struct xenvif_hash_cache {
> + spinlock_t lock;
> + struct list_head list;
> + unsigned int count;
> + atomic_t seq;
> +};
> +
> +struct xenvif_hash {
> + unsigned int alg;
> + u32 flags;
> + u8 key[XEN_NETBK_MAX_HASH_KEY_SIZE];
> + u32 mapping[XEN_NETBK_MAX_HASH_MAPPING_SIZE];
> + unsigned int size;
> + struct xenvif_hash_cache cache;
> +};
> +
> struct xenvif {
> /* Unique identifier for this interface. */
> domid_t domid;
> @@ -251,6 +280,8 @@ struct xenvif {
> unsigned int num_queues; /* active queues, resource allocated */
> unsigned int stalled_queues;
>
> + struct xenvif_hash hash;
> +
> struct xenbus_watch credit_watch;
> struct xenbus_watch mcast_ctrl_watch;
>
> @@ -353,6 +384,7 @@ extern bool separate_tx_rx_irq;
> extern unsigned int rx_drain_timeout_msecs;
> extern unsigned int rx_stall_timeout_msecs;
> extern unsigned int xenvif_max_queues;
> +extern unsigned int xenvif_hash_cache_size;
>
> #ifdef CONFIG_DEBUG_FS
> extern struct dentry *xen_netback_dbg_root;
> @@ -366,4 +398,18 @@ void xenvif_skb_zerocopy_complete(struct
> xenvif_queue *queue);
> bool xenvif_mcast_match(struct xenvif *vif, const u8 *addr);
> void xenvif_mcast_addr_list_free(struct xenvif *vif);
>
> +/* Hash */
> +void xenvif_init_hash(struct xenvif *vif);
> +void xenvif_deinit_hash(struct xenvif *vif);
> +
> +u32 xenvif_set_hash_alg(struct xenvif *vif, u32 alg);
> +u32 xenvif_get_hash_flags(struct xenvif *vif, u32 *flags);
> +u32 xenvif_set_hash_flags(struct xenvif *vif, u32 flags);
> +u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len);
> +u32 xenvif_set_hash_mapping_size(struct xenvif *vif, u32 size);
> +u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
> + u32 off);
> +
> +void xenvif_set_skb_hash(struct xenvif *vif, struct sk_buff *skb);
> +
> #endif /* __XEN_NETBACK__COMMON_H__ */
> diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-
> netback/hash.c
> new file mode 100644
> index 0000000..47edfe9
> --- /dev/null
> +++ b/drivers/net/xen-netback/hash.c
> @@ -0,0 +1,386 @@
> +/*
> + * Copyright (c) 2016 Citrix Systems Inc.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License version 2
> + * as published by the Free Softare Foundation; or, when distributed
> + * separately from the Linux kernel or incorporated into other
> + * software packages, subject to the following license:
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this source file (the "Software"), to deal in the Software without
> + * restriction, including without limitation the rights to use, copy, modify,
> + * merge, publish, distribute, sublicense, and/or sell copies of the
> Software,
> + * and to permit persons to whom the Software is furnished to do so,
> subject to
> + * the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
> EVENT SHALL THE
> + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
> OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> OTHER DEALINGS
> + * IN THE SOFTWARE.
> + */
> +
> +#define XEN_NETIF_DEFINE_TOEPLITZ
> +
> +#include "common.h"
> +#include <linux/vmalloc.h>
> +
> +static void xenvif_del_hash(struct rcu_head *rcu)
> +{
> + struct xenvif_hash_cache_entry *entry;
> +
> + entry = container_of(rcu, struct xenvif_hash_cache_entry, rcu);
> +
> + destroy_rcu_head(rcu);
> + kfree(entry);
> +}
> +
> +static void xenvif_add_hash(struct xenvif *vif, const u8 *tag,
> + unsigned int len, u32 val)
> +{
> + struct xenvif_hash_cache_entry *new, *entry, *oldest;
> + unsigned long flags;
> + bool found;
> +
> + new = kmalloc(sizeof(*entry), GFP_KERNEL);
> + if (!new)
> + return;
> +
> + init_rcu_head(&new->rcu);
> +
> + memcpy(new->tag, tag, len);
> + new->len = len;
> + new->val = val;
> +
> + spin_lock_irqsave(&vif->hash.cache.lock, flags);
> +
> + found = false;
> + oldest = NULL;
> + list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) {
> + /* Make sure we don't add duplicate entries */
> + if (entry->len == len &&
> + memcmp(entry->tag, tag, len) == 0)
> + found = true;
> + if (!oldest || entry->seq < oldest->seq)
> + oldest = entry;
> + }
> +
> + if (!found) {
> + new->seq = atomic_inc_return(&vif->hash.cache.seq);
> + list_add_rcu(&new->link, &vif->hash.cache.list);
> +
> + if (++vif->hash.cache.count > xenvif_hash_cache_size) {
> + list_del_rcu(&oldest->link);
> + vif->hash.cache.count--;
> + call_rcu(&oldest->rcu, xenvif_del_hash);
> + }
> + }
> +
> + spin_unlock_irqrestore(&vif->hash.cache.lock, flags);
> +
> + if (found)
> + kfree(new);
> +}
> +
> +static u32 xenvif_new_hash(struct xenvif *vif, const u8 *data,
> + unsigned int len)
> +{
> + u32 val;
> +
> + val = xen_netif_toeplitz_hash(vif->hash.key,
> + sizeof(vif->hash.key),
> + data, len);
> +
> + if (xenvif_hash_cache_size != 0)
> + xenvif_add_hash(vif, data, len, val);
> +
> + return val;
> +}
> +
> +static void xenvif_flush_hash(struct xenvif *vif)
> +{
> + struct xenvif_hash_cache_entry *entry;
> + unsigned long flags;
> +
> + if (xenvif_hash_cache_size == 0)
> + return;
> +
> + spin_lock_irqsave(&vif->hash.cache.lock, flags);
> +
> + list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) {
> + list_del_rcu(&entry->link);
> + vif->hash.cache.count--;
> + call_rcu(&entry->rcu, xenvif_del_hash);
> + }
> +
> + spin_unlock_irqrestore(&vif->hash.cache.lock, flags);
> +}
> +
> +static u32 xenvif_find_hash(struct xenvif *vif, const u8 *data,
> + unsigned int len)
> +{
> + struct xenvif_hash_cache_entry *entry;
> + u32 val;
> + bool found;
> +
> + if (len >= XEN_NETBK_HASH_TAG_SIZE)
> + return 0;
> +
> + if (xenvif_hash_cache_size == 0)
> + return xenvif_new_hash(vif, data, len);
> +
> + rcu_read_lock();
> +
> + found = false;
> +
> + list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) {
> + if (entry->len == len &&
> + memcmp(entry->tag, data, len) == 0) {
> + val = entry->val;
> + entry->seq = atomic_inc_return(&vif-
> >hash.cache.seq);
> + found = true;
> + break;
> + }
> + }
> +
> + rcu_read_unlock();
> +
> + if (!found)
> + val = xenvif_new_hash(vif, data, len);
> +
> + return val;
> +}
> +
> +void xenvif_set_skb_hash(struct xenvif *vif, struct sk_buff *skb)
> +{
> + struct flow_keys flow;
> + u32 hash = 0;
> + enum pkt_hash_types type = PKT_HASH_TYPE_NONE;
> + u32 flags = vif->hash.flags;
> + bool has_tcp_hdr;
> +
> + /* Quick rejection test: If the network protocol doesn't
> + * correspond to any enabled hash type then there's no point
> + * in parsing the packet header.
> + */
> + switch (skb->protocol) {
> + case htons(ETH_P_IP):
> + if (flags & (XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV4))
> + break;
> +
> + goto done;
> +
> + case htons(ETH_P_IPV6):
> + if (flags & (XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV6))
> + break;
> +
> + goto done;
> +
> + default:
> + goto done;
> + }
> +
> + memset(&flow, 0, sizeof(flow));
> + if (!skb_flow_dissect_flow_keys(skb, &flow, 0))
> + goto done;
> +
> + has_tcp_hdr = (flow.basic.ip_proto == IPPROTO_TCP) &&
> + !(flow.control.flags & FLOW_DIS_IS_FRAGMENT);
> +
> + switch (skb->protocol) {
> + case htons(ETH_P_IP):
> + if (has_tcp_hdr &&
> + (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP)) {
> + u8 data[12];
> +
> + memcpy(&data[0], &flow.addrs.v4addrs.src, 4);
> + memcpy(&data[4], &flow.addrs.v4addrs.dst, 4);
> + memcpy(&data[8], &flow.ports.src, 2);
> + memcpy(&data[10], &flow.ports.dst, 2);
> +
> + hash = xenvif_find_hash(vif, data, sizeof(data));
> + type = PKT_HASH_TYPE_L4;
> + } else if (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4) {
> + u8 data[8];
> +
> + memcpy(&data[0], &flow.addrs.v4addrs.src, 4);
> + memcpy(&data[4], &flow.addrs.v4addrs.dst, 4);
> +
> + hash = xenvif_find_hash(vif, data, sizeof(data));
> + type = PKT_HASH_TYPE_L3;
> + }
> +
> + break;
> +
> + case htons(ETH_P_IPV6):
> + if (has_tcp_hdr &&
> + (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)) {
> + u8 data[36];
> +
> + memcpy(&data[0], &flow.addrs.v6addrs.src, 16);
> + memcpy(&data[16], &flow.addrs.v6addrs.dst, 16);
> + memcpy(&data[32], &flow.ports.src, 2);
> + memcpy(&data[34], &flow.ports.dst, 2);
> +
> + hash = xenvif_find_hash(vif, data, sizeof(data));
> + type = PKT_HASH_TYPE_L4;
> + } else if (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6) {
> + u8 data[32];
> +
> + memcpy(&data[0], &flow.addrs.v6addrs.src, 16);
> + memcpy(&data[16], &flow.addrs.v6addrs.dst, 16);
> +
> + hash = xenvif_find_hash(vif, data, sizeof(data));
> + type = PKT_HASH_TYPE_L3;
> + }
> +
> + break;
> + }
> +
> +done:
> + if (type == PKT_HASH_TYPE_NONE)
> + skb_clear_hash(skb);
> + else
> + __skb_set_sw_hash(skb, hash, type ==
> PKT_HASH_TYPE_L4);
> +}
> +
> +u32 xenvif_set_hash_alg(struct xenvif *vif, u32 alg)
> +{
> + switch (alg) {
> + case XEN_NETIF_CTRL_HASH_ALGORITHM_NONE:
> + case XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ:
> + break;
> +
> + default:
> + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> + }
> +
> + vif->hash.alg = alg;
> +
> + return XEN_NETIF_CTRL_STATUS_SUCCESS;
> +}
> +
> +u32 xenvif_get_hash_flags(struct xenvif *vif, u32 *flags)
> +{
> + if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
> + return XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED;
> +
> + *flags = XEN_NETIF_CTRL_HASH_TYPE_IPV4 |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV6 |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP;
> +
> + return XEN_NETIF_CTRL_STATUS_SUCCESS;
> +}
> +
> +u32 xenvif_set_hash_flags(struct xenvif *vif, u32 flags)
> +{
> + if (flags & ~(XEN_NETIF_CTRL_HASH_TYPE_IPV4 |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV6 |
> + XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP))
> + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> +
> + if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
> + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> +
> + vif->hash.flags = flags;
> +
> + return XEN_NETIF_CTRL_STATUS_SUCCESS;
> +}
> +
> +u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len)
> +{
> + u8 *key = vif->hash.key;
> + struct gnttab_copy copy_op = {
> + .source.u.ref = gref,
> + .source.domid = vif->domid,
> + .dest.u.gmfn = virt_to_gfn(key),
> + .dest.domid = DOMID_SELF,
> + .dest.offset = xen_offset_in_page(key),
> + .len = len,
> + .flags = GNTCOPY_source_gref
> + };
> +
> + if (len > XEN_NETBK_MAX_HASH_KEY_SIZE)
> + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> +
> + if (len != 0) {
> + gnttab_batch_copy(©_op, 1);
> +
> + if (copy_op.status != GNTST_okay)
> + return
> XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> + }
> +
> + /* Clear any remaining key octets */
> + if (len < XEN_NETBK_MAX_HASH_KEY_SIZE)
> + memset(key + len, 0, XEN_NETBK_MAX_HASH_KEY_SIZE -
> len);
> +
> + xenvif_flush_hash(vif);
> +
> + return XEN_NETIF_CTRL_STATUS_SUCCESS;
> +}
> +
> +u32 xenvif_set_hash_mapping_size(struct xenvif *vif, u32 size)
> +{
> + if (size > XEN_NETBK_MAX_HASH_MAPPING_SIZE)
> + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> +
> + vif->hash.size = size;
> + memset(vif->hash.mapping, 0, sizeof(u32) * size);
> +
> + return XEN_NETIF_CTRL_STATUS_SUCCESS;
> +}
> +
> +u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
> + u32 off)
> +{
> + u32 *mapping = &vif->hash.mapping[off];
> + struct gnttab_copy copy_op = {
> + .source.u.ref = gref,
> + .source.domid = vif->domid,
> + .dest.u.gmfn = virt_to_gfn(mapping),
> + .dest.domid = DOMID_SELF,
> + .dest.offset = xen_offset_in_page(mapping),
> + .len = len * sizeof(u32),
> + .flags = GNTCOPY_source_gref
> + };
> +
> + if ((off + len > vif->hash.size) || copy_op.len > XEN_PAGE_SIZE)
> + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> +
> + while (len-- != 0)
> + if (mapping[off++] >= vif->num_queues)
> + return
> XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> +
> + if (len != 0) {
> + gnttab_batch_copy(©_op, 1);
> +
> + if (copy_op.status != GNTST_okay)
> + return
> XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
> + }
> +
> + return XEN_NETIF_CTRL_STATUS_SUCCESS;
> +}
> +
> +void xenvif_init_hash(struct xenvif *vif)
> +{
> + if (xenvif_hash_cache_size == 0)
> + return;
> +
> + spin_lock_init(&vif->hash.cache.lock);
> + INIT_LIST_HEAD(&vif->hash.cache.list);
> +}
> +
> +void xenvif_deinit_hash(struct xenvif *vif)
> +{
> + xenvif_flush_hash(vif);
> +}
> diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-
> netback/interface.c
> index 78a10d2..483080f 100644
> --- a/drivers/net/xen-netback/interface.c
> +++ b/drivers/net/xen-netback/interface.c
> @@ -151,6 +151,24 @@ void xenvif_wake_queue(struct xenvif_queue
> *queue)
> netif_tx_wake_queue(netdev_get_tx_queue(dev, id));
> }
>
> +static u16 xenvif_select_queue(struct net_device *dev, struct sk_buff
> *skb,
> + void *accel_priv,
> + select_queue_fallback_t fallback)
> +{
> + struct xenvif *vif = netdev_priv(dev);
> + unsigned int size = vif->hash.size;
> +
> + if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
> + return fallback(dev, skb) % dev->real_num_tx_queues;
> +
> + xenvif_set_skb_hash(vif, skb);
> +
> + if (size == 0)
> + return skb_get_hash_raw(skb) % dev-
> >real_num_tx_queues;
> +
> + return vif->hash.mapping[skb_get_hash_raw(skb) % size];
> +}
> +
> static int xenvif_start_xmit(struct sk_buff *skb, struct net_device *dev)
> {
> struct xenvif *vif = netdev_priv(dev);
> @@ -395,6 +413,7 @@ static const struct ethtool_ops xenvif_ethtool_ops = {
> };
>
> static const struct net_device_ops xenvif_netdev_ops = {
> + .ndo_select_queue = xenvif_select_queue,
> .ndo_start_xmit = xenvif_start_xmit,
> .ndo_get_stats = xenvif_get_stats,
> .ndo_open = xenvif_open,
> @@ -563,12 +582,14 @@ int xenvif_connect_ctrl(struct xenvif *vif,
> grant_ref_t ring_ref,
>
> vif->ctrl_irq = err;
>
> + xenvif_init_hash(vif);
> +
> task = kthread_create(xenvif_ctrl_kthread, (void *)vif,
> "%s-control", dev->name);
> if (IS_ERR(task)) {
> pr_warn("Could not allocate kthread for %s\n", dev->name);
> err = PTR_ERR(task);
> - goto err_deinit;
> + goto err_unbind;
> }
>
> get_task_struct(task);
> @@ -578,7 +599,8 @@ int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t
> ring_ref,
>
> return 0;
>
> -err_deinit:
> +err_unbind:
> + xenvif_deinit_hash(vif);
The label name change here is unintentional. I'll post v3. Sorry for the noise.
Paul
> unbind_from_irqhandler(vif->ctrl_irq, vif);
> vif->ctrl_irq = 0;
>
> @@ -749,6 +771,8 @@ void xenvif_disconnect_ctrl(struct xenvif *vif)
> vif->ctrl_task = NULL;
> }
>
> + xenvif_deinit_hash(vif);
> +
> if (vif->ctrl_irq) {
> unbind_from_irqhandler(vif->ctrl_irq, vif);
> vif->ctrl_irq = 0;
> diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-
> netback/netback.c
> index 45aa40b..6509d11 100644
> --- a/drivers/net/xen-netback/netback.c
> +++ b/drivers/net/xen-netback/netback.c
> @@ -89,6 +89,11 @@ module_param(fatal_skb_slots, uint, 0444);
> */
> #define XEN_NETBACK_TX_COPY_LEN 128
>
> +/* This is the maximum number of flows in the hash cache. */
> +#define XENVIF_HASH_CACHE_SIZE_DEFAULT 64
> +unsigned int xenvif_hash_cache_size =
> XENVIF_HASH_CACHE_SIZE_DEFAULT;
> +module_param_named(hash_cache_size, xenvif_hash_cache_size, uint,
> 0644);
> +MODULE_PARM_DESC(hash_cache_size, "Number of flows in the hash
> cache");
>
> static void xenvif_idx_release(struct xenvif_queue *queue, u16
> pending_idx,
> u8 status);
> @@ -2191,8 +2196,48 @@ static void push_ctrl_response(struct xenvif *vif)
> static void process_ctrl_request(struct xenvif *vif,
> const struct xen_netif_ctrl_request *req)
> {
> - make_ctrl_response(vif, req,
> XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED,
> - 0);
> + u32 status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED;
> + u32 data = 0;
> +
> + switch (req->type) {
> + case XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM:
> + status = xenvif_set_hash_alg(vif, req->data[0]);
> + break;
> +
> + case XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS:
> + status = xenvif_get_hash_flags(vif, &data);
> + break;
> +
> + case XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS:
> + status = xenvif_set_hash_flags(vif, req->data[0]);
> + break;
> +
> + case XEN_NETIF_CTRL_TYPE_SET_HASH_KEY:
> + status = xenvif_set_hash_key(vif, req->data[0],
> + req->data[1]);
> + break;
> +
> + case XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE:
> + status = XEN_NETIF_CTRL_STATUS_SUCCESS;
> + data = XEN_NETBK_MAX_HASH_MAPPING_SIZE;
> + break;
> +
> + case XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE:
> + status = xenvif_set_hash_mapping_size(vif,
> + req->data[0]);
> + break;
> +
> + case XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING:
> + status = xenvif_set_hash_mapping(vif, req->data[0],
> + req->data[1],
> + req->data[2]);
> + break;
> +
> + default:
> + break;
> + }
> +
> + make_ctrl_response(vif, req, status, data);
> push_ctrl_response(vif);
> }
>
> --
> 2.1.4
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