From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
[ Upstream commit b0689faa8efc5a3391402d7ae93bd373b7248e51 ]
In existing code, the receive indirection table, rx_table, is in
struct rndis_device, which will be reset when changing MTU, ringparam,
etc. User configured receive indirection table values will be lost.
To fix this, move rx_table to struct net_device_context, and check
netif_is_rxfh_configured(), so rx_table will be set to default only
if no user configured value.
Fixes: ff4a44199012 ("netvsc: allow get/set of RSS indirection table")
Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/hyperv/hyperv_net.h | 3 ++-
drivers/net/hyperv/netvsc_drv.c | 4 ++--
drivers/net/hyperv/rndis_filter.c | 10 +++++++---
3 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 0f07b5978fa1..fc794e69e6a1 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -179,7 +179,6 @@ struct rndis_device {
u8 hw_mac_adr[ETH_ALEN];
u8 rss_key[NETVSC_HASH_KEYLEN];
- u16 rx_table[ITAB_NUM];
};
@@ -741,6 +740,8 @@ struct net_device_context {
u32 tx_table[VRSS_SEND_TAB_SIZE];
+ u16 rx_table[ITAB_NUM];
+
/* Ethtool settings */
bool udp4_l4_hash;
bool udp6_l4_hash;
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 5a44b9795266..a89de5752a8c 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1528,7 +1528,7 @@ static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
rndis_dev = ndev->extension;
if (indir) {
for (i = 0; i < ITAB_NUM; i++)
- indir[i] = rndis_dev->rx_table[i];
+ indir[i] = ndc->rx_table[i];
}
if (key)
@@ -1558,7 +1558,7 @@ static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir,
return -EINVAL;
for (i = 0; i < ITAB_NUM; i++)
- rndis_dev->rx_table[i] = indir[i];
+ ndc->rx_table[i] = indir[i];
}
if (!key) {
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index fc1d5e14d83e..b19557c035f2 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -715,6 +715,7 @@ static int rndis_set_rss_param_msg(struct rndis_device *rdev,
const u8 *rss_key, u16 flag)
{
struct net_device *ndev = rdev->ndev;
+ struct net_device_context *ndc = netdev_priv(ndev);
struct rndis_request *request;
struct rndis_set_request *set;
struct rndis_set_complete *set_complete;
@@ -754,7 +755,7 @@ static int rndis_set_rss_param_msg(struct rndis_device *rdev,
/* Set indirection table entries */
itab = (u32 *)(rssp + 1);
for (i = 0; i < ITAB_NUM; i++)
- itab[i] = rdev->rx_table[i];
+ itab[i] = ndc->rx_table[i];
/* Set hask key values */
keyp = (u8 *)((unsigned long)rssp + rssp->kashkey_offset);
@@ -1204,6 +1205,7 @@ struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
struct netvsc_device_info *device_info)
{
struct net_device *net = hv_get_drvdata(dev);
+ struct net_device_context *ndc = netdev_priv(net);
struct netvsc_device *net_device;
struct rndis_device *rndis_device;
struct ndis_recv_scale_cap rsscap;
@@ -1286,9 +1288,11 @@ struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
/* We will use the given number of channels if available. */
net_device->num_chn = min(net_device->max_chn, device_info->num_chn);
- for (i = 0; i < ITAB_NUM; i++)
- rndis_device->rx_table[i] = ethtool_rxfh_indir_default(
+ if (!netif_is_rxfh_configured(net)) {
+ for (i = 0; i < ITAB_NUM; i++)
+ ndc->rx_table[i] = ethtool_rxfh_indir_default(
i, net_device->num_chn);
+ }
atomic_set(&net_device->open_chn, 1);
vmbus_set_sc_create_callback(dev->channel, netvsc_sc_open);
--
2.20.1
