* [RFC v2 0/1]: Add minimum bandwidth support in IP tool.
@ 2014-03-24 4:57 Sucheta Chakraborty
2014-03-24 4:57 ` [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool Sucheta Chakraborty
0 siblings, 1 reply; 6+ messages in thread
From: Sucheta Chakraborty @ 2014-03-24 4:57 UTC (permalink / raw)
To: netdev
Cc: Dept-HSGLinuxNICDev, ben, gregory.v.rose, linux-net-drivers,
Ariel.Elior, amirv, mkubecek
Today IP tool allows configuring only maximum bandwidth.
Likewise minimum bandwidth can also be configured for a VF. It puts
lower limit on the VF bandwidth. VF is guaranteed to have a bandwidth
of at least this value.
With this change, user can alter minimum bandwidth rate.
This patch series has 1 combined patch that adds required support in kernel
and qlcnic driver changes for minimum bandwidth support.
This change also requires changes in IP tool. I am sending that patch
separately.
Changes in v2 per suggestions from Ben Hutchings and Michal Kubecek:
net patch:
o Fixed enum index for IFLA_VF_RATE
o ndo_set_vf_rate replaces ndo_set_vf_tx_rate. Drivers that currently implement
ndo_set_vf_tx_rate is converted to implement ndo_set_vf_rate instead.
o If only IFLA_VF_TX_RATE is specified, the core should get the current minimum
before calling ndo_set_vf_rate.
o IFLA_VF_RATE should override if both IFLA_VF_RATE and IFLA_VF_TX_RATE are specified.
o Combined qlcnic patch to add support for minimum bandwidth with net patch
Please comment.
Thanks,
Sucheta.
Sucheta Chakraborty (1):
net: Add support to configure SR-IOV VF minimum and maximum Tx
rate through ip tool.
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 3 +-
drivers/net/ethernet/emulex/benet/be_main.c | 23 ++++++----
drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 6 ++-
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h | 3 +-
drivers/net/ethernet/intel/igb/igb_main.c | 20 +++++---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 13 ++++--
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h | 3 +-
drivers/net/ethernet/mellanox/mlx4/cmd.c | 11 +++--
drivers/net/ethernet/qlogic/qlcnic/qlcnic.h | 1 +
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c | 2 +-
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h | 2 +-
.../ethernet/qlogic/qlcnic/qlcnic_sriov_common.c | 1 +
.../net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c | 52 +++++++++++++++------
drivers/net/ethernet/sfc/siena_sriov.c | 3 +-
include/linux/if_link.h | 3 +-
include/linux/netdevice.h | 8 ++--
include/uapi/linux/if_link.h | 9 +++-
net/core/rtnetlink.c | 53 +++++++++++++++++++---
20 files changed, 159 insertions(+), 61 deletions(-)
^ permalink raw reply [flat|nested] 6+ messages in thread
* [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool.
2014-03-24 4:57 [RFC v2 0/1]: Add minimum bandwidth support in IP tool Sucheta Chakraborty
@ 2014-03-24 4:57 ` Sucheta Chakraborty
2014-03-24 18:55 ` Ben Hutchings
0 siblings, 1 reply; 6+ messages in thread
From: Sucheta Chakraborty @ 2014-03-24 4:57 UTC (permalink / raw)
To: netdev
Cc: Dept-HSGLinuxNICDev, ben, gregory.v.rose, linux-net-drivers,
Ariel.Elior, amirv, mkubecek
o min_tx_rate puts lower limit on the VF bandwidth. VF is guaranteed
to have a bandwidth of at least this value.
max_tx_rate puts cap on the VF bandwidth. VF can have a bandwidth
of up to this value.
o A new handler set_vf_rate for attr IFLA_VF_RATE has been introduced
which takes 4 arguments:
netdev, VF number, min_tx_rate, max_tx_rate
o ndo_set_vf_rate replaces ndo_set_vf_tx_rate handler.
o If only IFLA_VF_TX_RATE is specified, the core should get the current
minimum before calling ndo_set_vf_rate.
Drivers that currently implement ndo_set_vf_tx_rate should now call
ndo_set_vf_rate instead and reject attempt to set a minimum bandwidth
greater than 0.
o If both IFLA_VF_TX_RATE and IFLA_VF_RATE options are specified, then
IFLA_VF_RATE should override.
o Idea is to deprecate IFLA_VF_TX_RATE in future.
And to have consistent display of rate values to user.
o Usage example: -
./ip link set p4p1 vf 0 rate 900
WARN: "rate" option will be deprecated. Use "min_tx_rate" and
"max_tx_rate" instead.
./ip link show p4p1
32: p4p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode
DEFAULT qlen 1000
link/ether 00:0e:1e:08:b0:f0 brd ff:ff:ff:ff:ff:ff
vf 0 MAC 3e:a0:ca:bd:ae:5a, tx rate 900 (Mbps), max tx rate 900
(Mbps)
vf 1 MAC f6:c6:7c:3f:3d:6c
vf 2 MAC 56:32:43:98:d7:71
vf 3 MAC d6:be:c3:b5:85:ff
vf 4 MAC ee:a9:9a:1e:19:14
vf 5 MAC 4a:d0:4c:07:52:18
vf 6 MAC 3a:76:44:93:62:f9
vf 7 MAC 82:e9:e7:e3:15:1a
./ip link set p4p1 vf 0 max_tx_rate 300 min_tx_rate 200
./ip link show p4p1
32: p4p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode
DEFAULT qlen 1000
link/ether 00:0e:1e:08:b0:f0 brd ff:ff:ff:ff:ff:ff
vf 0 MAC 3e:a0:ca:bd:ae:5a, tx rate 300 (Mbps), max tx rate 300
(Mbps), min tx rate 200 (Mbps)
vf 1 MAC f6:c6:7c:3f:3d:6c
vf 2 MAC 56:32:43:98:d7:71
vf 3 MAC d6:be:c3:b5:85:ff
vf 4 MAC ee:a9:9a:1e:19:14
vf 5 MAC 4a:d0:4c:07:52:18
vf 6 MAC 3a:76:44:93:62:f9
vf 7 MAC 82:e9:e7:e3:15:1a
./ip link set p4p1 vf 0 max_tx_rate 600 rate 300
WARN: "rate" option will be deprecated. Use "min_tx_rate" and
"max_tx_rate" instead.
./ip link show p4p1
32: p4p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode
DEFAULT qlen 1000
link/ether 00:0e:1e:08:b0:f brd ff:ff:ff:ff:ff:ff
vf 0 MAC 3e:a0:ca:bd:ae:5, tx rate 600 (Mbps), max tx rate 600
(Mbps), min tx rate 200 (Mbps)
vf 1 MAC f6:c6:7c:3f:3d:6c
vf 2 MAC 56:32:43:98:d7:71
vf 3 MAC d6:be:c3:b5:85:ff
vf 4 MAC ee:a9:9a:1e:19:14
vf 5 MAC 4a:d0:4c:07:52:18
vf 6 MAC 3a:76:44:93:62:f9
vf 7 MAC 82:e9:e7:e3:15:1a
Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
---
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 3 +-
drivers/net/ethernet/emulex/benet/be_main.c | 23 ++++++----
drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 6 ++-
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h | 3 +-
drivers/net/ethernet/intel/igb/igb_main.c | 20 +++++---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 13 ++++--
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h | 3 +-
drivers/net/ethernet/mellanox/mlx4/cmd.c | 11 +++--
drivers/net/ethernet/qlogic/qlcnic/qlcnic.h | 1 +
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c | 2 +-
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h | 2 +-
.../ethernet/qlogic/qlcnic/qlcnic_sriov_common.c | 1 +
.../net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c | 52 +++++++++++++++------
drivers/net/ethernet/sfc/siena_sriov.c | 3 +-
include/linux/if_link.h | 3 +-
include/linux/netdevice.h | 8 ++--
include/uapi/linux/if_link.h | 9 +++-
net/core/rtnetlink.c | 53 +++++++++++++++++++---
20 files changed, 159 insertions(+), 61 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
index 61e6f60..04616c2 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
@@ -3485,7 +3485,8 @@ int bnx2x_get_vf_config(struct net_device *dev, int vfidx,
ivi->vf = vfidx;
ivi->qos = 0;
- ivi->tx_rate = 10000; /* always 10G. TBA take from link struct */
+ ivi->max_tx_rate = 10000; /* always 10G. TBA take from link struct */
+ ivi->min_tx_rate = 0;
ivi->spoofchk = 1; /*always enabled */
if (vf->state == VF_ENABLED) {
/* mac and vlan are in vlan_mac objects */
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 4f87f5c..89468bb 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -1264,7 +1264,8 @@ static int be_get_vf_config(struct net_device *netdev, int vf,
return -EINVAL;
vi->vf = vf;
- vi->tx_rate = vf_cfg->tx_rate;
+ vi->max_tx_rate = vf_cfg->tx_rate;
+ vi->min_tx_rate = 0;
vi->vlan = vf_cfg->vlan_tag & VLAN_VID_MASK;
vi->qos = vf_cfg->vlan_tag >> VLAN_PRIO_SHIFT;
memcpy(&vi->mac, vf_cfg->mac_addr, ETH_ALEN);
@@ -1308,8 +1309,8 @@ static int be_set_vf_vlan(struct net_device *netdev,
return status;
}
-static int be_set_vf_tx_rate(struct net_device *netdev,
- int vf, int rate)
+static int be_set_vf_tx_rate(struct net_device *netdev, int vf,
+ int min_tx_rate, int max_tx_rate)
{
struct be_adapter *adapter = netdev_priv(netdev);
int status = 0;
@@ -1320,22 +1321,26 @@ static int be_set_vf_tx_rate(struct net_device *netdev,
if (vf >= adapter->num_vfs)
return -EINVAL;
- if (rate < 100 || rate > 10000) {
+ if (min_tx_rate)
+ return -EINVAL;
+
+ if (max_tx_rate < 100 || max_tx_rate > 10000) {
dev_err(&adapter->pdev->dev,
"tx rate must be between 100 and 10000 Mbps\n");
return -EINVAL;
}
if (lancer_chip(adapter))
- status = be_cmd_set_profile_config(adapter, rate / 10, vf + 1);
+ status = be_cmd_set_profile_config(adapter, max_tx_rate / 10,
+ vf + 1);
else
- status = be_cmd_set_qos(adapter, rate / 10, vf + 1);
+ status = be_cmd_set_qos(adapter, max_tx_rate / 10, vf + 1);
if (status)
dev_err(&adapter->pdev->dev,
- "tx rate %d on VF %d failed\n", rate, vf);
+ "max tx rate %d on VF %d failed\n", max_tx_rate, vf);
else
- adapter->vf_cfg[vf].tx_rate = rate;
+ adapter->vf_cfg[vf].tx_rate = max_tx_rate;
return status;
}
@@ -4079,7 +4084,7 @@ static const struct net_device_ops be_netdev_ops = {
.ndo_vlan_rx_kill_vid = be_vlan_rem_vid,
.ndo_set_vf_mac = be_set_vf_mac,
.ndo_set_vf_vlan = be_set_vf_vlan,
- .ndo_set_vf_tx_rate = be_set_vf_tx_rate,
+ .ndo_set_vf_rate = be_set_vf_tx_rate,
.ndo_get_vf_config = be_get_vf_config,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = be_netpoll,
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 53f3ed2..fd58fb8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6446,7 +6446,7 @@ static const struct net_device_ops i40e_netdev_ops = {
.ndo_set_features = i40e_set_features,
.ndo_set_vf_mac = i40e_ndo_set_vf_mac,
.ndo_set_vf_vlan = i40e_ndo_set_vf_port_vlan,
- .ndo_set_vf_tx_rate = i40e_ndo_set_vf_bw,
+ .ndo_set_vf_rate = i40e_ndo_set_vf_bw,
.ndo_get_vf_config = i40e_ndo_get_vf_config,
#ifdef CONFIG_I40E_VXLAN
.ndo_add_vxlan_port = i40e_add_vxlan_port,
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 189e250..1782769 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2141,7 +2141,8 @@ error_pvid:
*
* configure vf tx rate
**/
-int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int tx_rate)
+int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,
+ int max_tx_rate)
{
return -EOPNOTSUPP;
}
@@ -2183,7 +2184,8 @@ int i40e_ndo_get_vf_config(struct net_device *netdev,
memcpy(&ivi->mac, vf->default_lan_addr.addr, ETH_ALEN);
- ivi->tx_rate = 0;
+ ivi->max_tx_rate = 0;
+ ivi->min_tx_rate = 0;
ivi->vlan = le16_to_cpu(vsi->info.pvid) & I40E_VLAN_MASK;
ivi->qos = (le16_to_cpu(vsi->info.pvid) & I40E_PRIORITY_MASK) >>
I40E_VLAN_PRIORITY_SHIFT;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index bedf0ba..6461f67 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -113,7 +113,8 @@ void i40e_vc_notify_vf_reset(struct i40e_vf *vf);
int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac);
int i40e_ndo_set_vf_port_vlan(struct net_device *netdev,
int vf_id, u16 vlan_id, u8 qos);
-int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int tx_rate);
+int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,
+ int max_tx_rate);
int i40e_ndo_get_vf_config(struct net_device *netdev,
int vf_id, struct ifla_vf_info *ivi);
void i40e_vc_notify_link_state(struct i40e_pf *pf);
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 3384156..a76ffab 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -172,7 +172,7 @@ static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac);
static int igb_ndo_set_vf_vlan(struct net_device *netdev,
int vf, u16 vlan, u8 qos);
-static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
+static int igb_ndo_set_vf_bw(struct net_device *, int, int, int);
static int igb_ndo_set_vf_spoofchk(struct net_device *netdev, int vf,
bool setting);
static int igb_ndo_get_vf_config(struct net_device *netdev, int vf,
@@ -2039,7 +2039,7 @@ static const struct net_device_ops igb_netdev_ops = {
.ndo_vlan_rx_kill_vid = igb_vlan_rx_kill_vid,
.ndo_set_vf_mac = igb_ndo_set_vf_mac,
.ndo_set_vf_vlan = igb_ndo_set_vf_vlan,
- .ndo_set_vf_tx_rate = igb_ndo_set_vf_bw,
+ .ndo_set_vf_rate = igb_ndo_set_vf_bw,
.ndo_set_vf_spoofchk = igb_ndo_set_vf_spoofchk,
.ndo_get_vf_config = igb_ndo_get_vf_config,
#ifdef CONFIG_NET_POLL_CONTROLLER
@@ -7790,7 +7790,8 @@ static void igb_check_vf_rate_limit(struct igb_adapter *adapter)
}
}
-static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
+static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf,
+ int min_tx_rate, int max_tx_rate)
{
struct igb_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
@@ -7799,15 +7800,19 @@ static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
if (hw->mac.type != e1000_82576)
return -EOPNOTSUPP;
+ if (min_tx_rate)
+ return -EINVAL;
+
actual_link_speed = igb_link_mbps(adapter->link_speed);
if ((vf >= adapter->vfs_allocated_count) ||
(!(rd32(E1000_STATUS) & E1000_STATUS_LU)) ||
- (tx_rate < 0) || (tx_rate > actual_link_speed))
+ (max_tx_rate < 0) ||
+ (max_tx_rate > actual_link_speed))
return -EINVAL;
adapter->vf_rate_link_speed = actual_link_speed;
- adapter->vf_data[vf].tx_rate = (u16)tx_rate;
- igb_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
+ adapter->vf_data[vf].tx_rate = (u16)max_tx_rate;
+ igb_set_vf_rate_limit(hw, vf, max_tx_rate, actual_link_speed);
return 0;
}
@@ -7847,7 +7852,8 @@ static int igb_ndo_get_vf_config(struct net_device *netdev,
return -EINVAL;
ivi->vf = vf;
memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN);
- ivi->tx_rate = adapter->vf_data[vf].tx_rate;
+ ivi->max_tx_rate = adapter->vf_data[vf].tx_rate;
+ ivi->min_tx_rate = 0;
ivi->vlan = adapter->vf_data[vf].pf_vlan;
ivi->qos = adapter->vf_data[vf].pf_qos;
ivi->spoofchk = adapter->vf_data[vf].spoofchk_enabled;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index a345cc7..1dcb36f 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7713,7 +7713,7 @@ static const struct net_device_ops ixgbe_netdev_ops = {
.ndo_do_ioctl = ixgbe_ioctl,
.ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
.ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
- .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
+ .ndo_set_vf_rate = ixgbe_ndo_set_vf_bw,
.ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
.ndo_get_vf_config = ixgbe_ndo_get_vf_config,
.ndo_get_stats64 = ixgbe_get_stats64,
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index dff0977..afb9c90 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -1230,7 +1230,8 @@ void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter)
}
}
-int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
+int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int min_tx_rate,
+ int max_tx_rate)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
int link_speed;
@@ -1248,13 +1249,16 @@ int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
if (link_speed != 10000)
return -EINVAL;
+ if (min_tx_rate)
+ return -EINVAL;
+
/* rate limit cannot be less than 10Mbs or greater than link speed */
- if (tx_rate && ((tx_rate <= 10) || (tx_rate > link_speed)))
+ if (max_tx_rate && ((max_tx_rate <= 10) || (max_tx_rate > link_speed)))
return -EINVAL;
/* store values */
adapter->vf_rate_link_speed = link_speed;
- adapter->vfinfo[vf].tx_rate = tx_rate;
+ adapter->vfinfo[vf].tx_rate = max_tx_rate;
/* update hardware configuration */
ixgbe_set_vf_rate_limit(adapter, vf);
@@ -1296,7 +1300,8 @@ int ixgbe_ndo_get_vf_config(struct net_device *netdev,
return -EINVAL;
ivi->vf = vf;
memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
- ivi->tx_rate = adapter->vfinfo[vf].tx_rate;
+ ivi->max_tx_rate = adapter->vfinfo[vf].tx_rate;
+ ivi->min_tx_rate = 0;
ivi->vlan = adapter->vfinfo[vf].pf_vlan;
ivi->qos = adapter->vfinfo[vf].pf_qos;
ivi->spoofchk = adapter->vfinfo[vf].spoofchk_enabled;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
index 8bd2919..bbf18af1 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
@@ -41,7 +41,8 @@ void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter);
int ixgbe_ndo_set_vf_mac(struct net_device *netdev, int queue, u8 *mac);
int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int queue, u16 vlan,
u8 qos);
-int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
+int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int min_tx_rate,
+ int max_tx_rate);
int ixgbe_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting);
int ixgbe_ndo_get_vf_config(struct net_device *netdev,
int vf, struct ifla_vf_info *ivi);
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 0d02fba..7b51fa2 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -2334,11 +2334,12 @@ int mlx4_get_vf_config(struct mlx4_dev *dev, int port, int vf, struct ifla_vf_in
ivf->mac[4] = ((s_info->mac >> (1*8)) & 0xff);
ivf->mac[5] = ((s_info->mac) & 0xff);
- ivf->vlan = s_info->default_vlan;
- ivf->qos = s_info->default_qos;
- ivf->tx_rate = s_info->tx_rate;
- ivf->spoofchk = s_info->spoofchk;
- ivf->linkstate = s_info->link_state;
+ ivf->vlan = s_info->default_vlan;
+ ivf->qos = s_info->default_qos;
+ ivf->max_tx_rate = s_info->tx_rate;
+ ivf->min_tx_rate = 0;
+ ivf->spoofchk = s_info->spoofchk;
+ ivf->linkstate = s_info->link_state;
return 0;
}
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
index df9daa3..659bc96 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
@@ -1291,6 +1291,7 @@ struct qlcnic_eswitch {
#define QL_STATUS_INVALID_PARAM -1
#define MAX_BW 100 /* % of link speed */
+#define MIN_BW 1 /* % of link speed */
#define MAX_VLAN_ID 4095
#define MIN_VLAN_ID 2
#define DEFAULT_MAC_LEARN 1
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index a335472..280beeb 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -484,7 +484,7 @@ static const struct net_device_ops qlcnic_netdev_ops = {
#endif
#ifdef CONFIG_QLCNIC_SRIOV
.ndo_set_vf_mac = qlcnic_sriov_set_vf_mac,
- .ndo_set_vf_tx_rate = qlcnic_sriov_set_vf_tx_rate,
+ .ndo_set_vf_rate = qlcnic_sriov_set_vf_tx_rate,
.ndo_get_vf_config = qlcnic_sriov_get_vf_config,
.ndo_set_vf_vlan = qlcnic_sriov_set_vf_vlan,
.ndo_set_vf_spoofchk = qlcnic_sriov_set_vf_spoofchk,
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h
index 396bd1f..c38ac4c 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h
@@ -231,7 +231,7 @@ bool qlcnic_sriov_soft_flr_check(struct qlcnic_adapter *,
void qlcnic_sriov_pf_reset(struct qlcnic_adapter *);
int qlcnic_sriov_pf_reinit(struct qlcnic_adapter *);
int qlcnic_sriov_set_vf_mac(struct net_device *, int, u8 *);
-int qlcnic_sriov_set_vf_tx_rate(struct net_device *, int, int);
+int qlcnic_sriov_set_vf_tx_rate(struct net_device *, int, int, int);
int qlcnic_sriov_get_vf_config(struct net_device *, int ,
struct ifla_vf_info *);
int qlcnic_sriov_set_vf_vlan(struct net_device *, int, u16, u8);
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
index 0638c18..2304848 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
@@ -198,6 +198,7 @@ int qlcnic_sriov_init(struct qlcnic_adapter *adapter, int num_vfs)
}
sriov->vf_info[i].vp = vp;
vp->max_tx_bw = MAX_BW;
+ vp->min_tx_bw = MIN_BW;
vp->spoofchk = true;
random_ether_addr(vp->mac);
dev_info(&adapter->pdev->dev,
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
index a28460c..4d66862 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c
@@ -1814,7 +1814,8 @@ int qlcnic_sriov_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
return 0;
}
-int qlcnic_sriov_set_vf_tx_rate(struct net_device *netdev, int vf, int tx_rate)
+int qlcnic_sriov_set_vf_tx_rate(struct net_device *netdev, int vf,
+ int min_tx_rate, int max_tx_rate)
{
struct qlcnic_adapter *adapter = netdev_priv(netdev);
struct qlcnic_sriov *sriov = adapter->ahw->sriov;
@@ -1829,35 +1830,52 @@ int qlcnic_sriov_set_vf_tx_rate(struct net_device *netdev, int vf, int tx_rate)
if (vf >= sriov->num_vfs)
return -EINVAL;
- if (tx_rate >= 10000 || tx_rate < 100) {
+ vf_info = &sriov->vf_info[vf];
+ vp = vf_info->vp;
+ vpid = vp->handle;
+
+ if (!min_tx_rate)
+ min_tx_rate = QLC_VF_MIN_TX_RATE;
+
+ if (max_tx_rate &&
+ (max_tx_rate >= 10000 || max_tx_rate < min_tx_rate)) {
netdev_err(netdev,
- "Invalid Tx rate, allowed range is [%d - %d]",
- QLC_VF_MIN_TX_RATE, QLC_VF_MAX_TX_RATE);
+ "Invalid max Tx rate, allowed range is [%d - %d]",
+ min_tx_rate, QLC_VF_MAX_TX_RATE);
return -EINVAL;
}
- if (tx_rate == 0)
- tx_rate = 10000;
+ if (!max_tx_rate)
+ max_tx_rate = 10000;
- vf_info = &sriov->vf_info[vf];
- vp = vf_info->vp;
- vpid = vp->handle;
+ if (min_tx_rate &&
+ (min_tx_rate > max_tx_rate || min_tx_rate < QLC_VF_MIN_TX_RATE)) {
+ netdev_err(netdev,
+ "Invalid min Tx rate, allowed range is [%d - %d]",
+ QLC_VF_MIN_TX_RATE, max_tx_rate);
+ return -EINVAL;
+ }
if (test_bit(QLC_BC_VF_STATE, &vf_info->state)) {
if (qlcnic_sriov_get_vf_vport_info(adapter, &nic_info, vpid))
return -EIO;
- nic_info.max_tx_bw = tx_rate / 100;
+ nic_info.max_tx_bw = max_tx_rate / 100;
+ nic_info.min_tx_bw = min_tx_rate / 100;
nic_info.bit_offsets = BIT_0;
if (qlcnic_sriov_pf_set_vport_info(adapter, &nic_info, vpid))
return -EIO;
}
- vp->max_tx_bw = tx_rate / 100;
+ vp->max_tx_bw = max_tx_rate / 100;
+ netdev_info(netdev,
+ "Setting Max Tx rate %d (Mbps), %d %% of PF bandwidth, for VF %d\n",
+ max_tx_rate, vp->max_tx_bw, vf);
+ vp->min_tx_bw = min_tx_rate / 100;
netdev_info(netdev,
- "Setting Tx rate %d (Mbps), %d %% of PF bandwidth, for VF %d\n",
- tx_rate, vp->max_tx_bw, vf);
+ "Setting Min Tx rate %d (Mbps), %d %% of PF bandwidth, for VF %d\n",
+ min_tx_rate, vp->min_tx_bw, vf);
return 0;
}
@@ -1956,9 +1974,13 @@ int qlcnic_sriov_get_vf_config(struct net_device *netdev,
ivi->qos = vp->qos;
ivi->spoofchk = vp->spoofchk;
if (vp->max_tx_bw == MAX_BW)
- ivi->tx_rate = 0;
+ ivi->max_tx_rate = 0;
+ else
+ ivi->max_tx_rate = vp->max_tx_bw * 100;
+ if (vp->min_tx_bw == MIN_BW)
+ ivi->min_tx_rate = 0;
else
- ivi->tx_rate = vp->max_tx_bw * 100;
+ ivi->min_tx_rate = vp->min_tx_bw * 100;
ivi->vf = vf;
return 0;
diff --git a/drivers/net/ethernet/sfc/siena_sriov.c b/drivers/net/ethernet/sfc/siena_sriov.c
index 0c38f92..86a132c 100644
--- a/drivers/net/ethernet/sfc/siena_sriov.c
+++ b/drivers/net/ethernet/sfc/siena_sriov.c
@@ -1634,7 +1634,8 @@ int efx_sriov_get_vf_config(struct net_device *net_dev, int vf_i,
ivi->vf = vf_i;
memcpy(ivi->mac, vf->addr.mac_addr, ETH_ALEN);
- ivi->tx_rate = 0;
+ ivi->max_tx_rate = 0;
+ ivi->min_tx_rate = 0;
tci = ntohs(vf->addr.tci);
ivi->vlan = tci & VLAN_VID_MASK;
ivi->qos = (tci >> VLAN_PRIO_SHIFT) & 0x7;
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index a86784d..119130e 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -10,8 +10,9 @@ struct ifla_vf_info {
__u8 mac[32];
__u32 vlan;
__u32 qos;
- __u32 tx_rate;
__u32 spoofchk;
__u32 linkstate;
+ __u32 min_tx_rate;
+ __u32 max_tx_rate;
};
#endif /* _LINUX_IF_LINK_H */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1a86948..edc9fd4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -853,7 +853,8 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
* SR-IOV management functions.
* int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
* int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
- * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
+ * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
+ * int max_tx_rate);
* int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
* int (*ndo_get_vf_config)(struct net_device *dev,
* int vf, struct ifla_vf_info *ivf);
@@ -1048,8 +1049,9 @@ struct net_device_ops {
int queue, u8 *mac);
int (*ndo_set_vf_vlan)(struct net_device *dev,
int queue, u16 vlan, u8 qos);
- int (*ndo_set_vf_tx_rate)(struct net_device *dev,
- int vf, int rate);
+ int (*ndo_set_vf_rate)(struct net_device *dev,
+ int vf, int min_tx_rate,
+ int max_tx_rate);
int (*ndo_set_vf_spoofchk)(struct net_device *dev,
int vf, bool setting);
int (*ndo_get_vf_config)(struct net_device *dev,
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 16410b6..c8b426f 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -398,9 +398,10 @@ enum {
IFLA_VF_UNSPEC,
IFLA_VF_MAC, /* Hardware queue specific attributes */
IFLA_VF_VLAN,
- IFLA_VF_TX_RATE, /* TX Bandwidth Allocation */
+ IFLA_VF_TX_RATE, /* Max TX Bandwidth Allocation */
IFLA_VF_SPOOFCHK, /* Spoof Checking on/off switch */
IFLA_VF_LINK_STATE, /* link state enable/disable/auto switch */
+ IFLA_VF_RATE, /* Min and Max TX Bandwidth Allocation */
__IFLA_VF_MAX,
};
@@ -422,6 +423,12 @@ struct ifla_vf_tx_rate {
__u32 rate; /* Max TX bandwidth in Mbps, 0 disables throttling */
};
+struct ifla_vf_rate {
+ __u32 vf;
+ __u32 min_tx_rate; /* Min Bandwidth in Mbps */
+ __u32 max_tx_rate; /* Max Bandwidth in Mbps */
+};
+
struct ifla_vf_spoofchk {
__u32 vf;
__u32 setting;
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index fc122fd..c35eb6f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -767,8 +767,8 @@ static inline int rtnl_vfinfo_size(const struct net_device *dev,
size += num_vfs *
(nla_total_size(sizeof(struct ifla_vf_mac)) +
nla_total_size(sizeof(struct ifla_vf_vlan)) +
- nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
- nla_total_size(sizeof(struct ifla_vf_spoofchk)));
+ nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
+ nla_total_size(sizeof(struct ifla_vf_rate)));
return size;
} else
return 0;
@@ -1027,6 +1027,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
struct ifla_vf_info ivi;
struct ifla_vf_mac vf_mac;
struct ifla_vf_vlan vf_vlan;
+ struct ifla_vf_rate vf_rate;
struct ifla_vf_tx_rate vf_tx_rate;
struct ifla_vf_spoofchk vf_spoofchk;
struct ifla_vf_link_state vf_linkstate;
@@ -1047,6 +1048,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
break;
vf_mac.vf =
vf_vlan.vf =
+ vf_rate.vf =
vf_tx_rate.vf =
vf_spoofchk.vf =
vf_linkstate.vf = ivi.vf;
@@ -1054,7 +1056,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
vf_vlan.vlan = ivi.vlan;
vf_vlan.qos = ivi.qos;
- vf_tx_rate.rate = ivi.tx_rate;
+ vf_tx_rate.rate = ivi.max_tx_rate;
+ vf_rate.min_tx_rate = ivi.min_tx_rate;
+ vf_rate.max_tx_rate = ivi.max_tx_rate;
vf_spoofchk.setting = ivi.spoofchk;
vf_linkstate.link_state = ivi.linkstate;
vf = nla_nest_start(skb, IFLA_VF_INFO);
@@ -1064,6 +1068,8 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
}
if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
+ nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
+ &vf_rate) ||
nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
&vf_tx_rate) ||
nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
@@ -1169,6 +1175,8 @@ static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
.len = sizeof(struct ifla_vf_tx_rate) },
[IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
.len = sizeof(struct ifla_vf_spoofchk) },
+ [IFLA_VF_RATE] = { .type = NLA_BINARY,
+ .len = sizeof(struct ifla_vf_rate) },
};
static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
@@ -1321,11 +1329,44 @@ static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
}
case IFLA_VF_TX_RATE: {
struct ifla_vf_tx_rate *ivt;
+ struct ifla_vf_info ivf;
+
+ ivt = nla_data(vf);
+ err = -EOPNOTSUPP;
+ if (ops->ndo_get_vf_config)
+ err = ops->ndo_get_vf_config(dev, ivt->vf,
+ &ivf);
+ if (err)
+ break;
+ if (ops->ndo_set_vf_rate)
+ err = ops->ndo_set_vf_rate(dev, ivt->vf,
+ ivf.min_tx_rate,
+ ivt->rate);
+ break;
+ }
+ case IFLA_VF_RATE: {
+ struct ifla_vf_rate *ivt;
+ struct ifla_vf_info ivf;
ivt = nla_data(vf);
err = -EOPNOTSUPP;
- if (ops->ndo_set_vf_tx_rate)
- err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
- ivt->rate);
+ if ((ivt->min_tx_rate == -1 ||
+ ivt->max_tx_rate == -1) &&
+ ops->ndo_get_vf_config)
+ err = ops->ndo_get_vf_config(dev, ivt->vf,
+ &ivf);
+ else
+ err = 0;
+ if (err)
+ break;
+ if (ivt->min_tx_rate == -1)
+ ivt->min_tx_rate = ivf.min_tx_rate;
+ if (ivt->max_tx_rate == -1)
+ ivt->max_tx_rate = ivf.max_tx_rate;
+ err = -EOPNOTSUPP;
+ if (ops->ndo_set_vf_rate)
+ err = ops->ndo_set_vf_rate(dev, ivt->vf,
+ ivt->min_tx_rate,
+ ivt->max_tx_rate);
break;
}
case IFLA_VF_SPOOFCHK: {
--
1.8.1.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool.
2014-03-24 4:57 ` [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool Sucheta Chakraborty
@ 2014-03-24 18:55 ` Ben Hutchings
2014-03-26 7:25 ` Sucheta Chakraborty
2014-03-26 7:37 ` Michal Kubecek
0 siblings, 2 replies; 6+ messages in thread
From: Ben Hutchings @ 2014-03-24 18:55 UTC (permalink / raw)
To: Sucheta Chakraborty
Cc: netdev, Dept-HSGLinuxNICDev, gregory.v.rose, linux-net-drivers,
Ariel.Elior, amirv, mkubecek
[-- Attachment #1: Type: text/plain, Size: 1307 bytes --]
On Mon, 2014-03-24 at 00:57 -0400, Sucheta Chakraborty wrote:
[...]
> --- a/net/core/rtnetlink.c
> +++ b/net/core/rtnetlink.c
[...]
> + case IFLA_VF_RATE: {
> + struct ifla_vf_rate *ivt;
> + struct ifla_vf_info ivf;
> ivt = nla_data(vf);
> err = -EOPNOTSUPP;
> - if (ops->ndo_set_vf_tx_rate)
> - err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
> - ivt->rate);
> + if ((ivt->min_tx_rate == -1 ||
> + ivt->max_tx_rate == -1) &&
> + ops->ndo_get_vf_config)
> + err = ops->ndo_get_vf_config(dev, ivt->vf,
> + &ivf);
> + else
> + err = 0;
> + if (err)
> + break;
> + if (ivt->min_tx_rate == -1)
> + ivt->min_tx_rate = ivf.min_tx_rate;
> + if (ivt->max_tx_rate == -1)
> + ivt->max_tx_rate = ivf.max_tx_rate;
[...]
This is modifying the the content of the netlink skb, which I think is
not allowed. I think you need to use local variables for this instead.
Also, this special-casing of -1 isn't documented anywhere. Is it even
necessary? If userland needs to set just one limit, it can read the
existing limits and set both.
Ben.
--
Ben Hutchings
Everything should be made as simple as possible, but not simpler.
- Albert Einstein
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 811 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool.
2014-03-24 18:55 ` Ben Hutchings
@ 2014-03-26 7:25 ` Sucheta Chakraborty
2014-03-26 7:37 ` Michal Kubecek
1 sibling, 0 replies; 6+ messages in thread
From: Sucheta Chakraborty @ 2014-03-26 7:25 UTC (permalink / raw)
To: Ben Hutchings
Cc: netdev, Dept-HSG Linux NIC Dev, gregory.v.rose@intel.com,
linux-net-drivers@solarflare.com, Ariel Elior, amirv@mellanox.com,
mkubecek@suse.cz
> -----Original Message-----
> From: Ben Hutchings [mailto:ben@decadent.org.uk]
> Sent: Tuesday, March 25, 2014 12:25 AM
> To: Sucheta Chakraborty
> Cc: netdev; Dept-HSG Linux NIC Dev; gregory.v.rose@intel.com; linux-
> net-drivers@solarflare.com; Ariel Elior; amirv@mellanox.com;
> mkubecek@suse.cz
> Subject: Re: [RFC v2 1/1] net: Add support to configure SR-IOV VF
> minimum and maximum Tx rate through ip tool.
>
> On Mon, 2014-03-24 at 00:57 -0400, Sucheta Chakraborty wrote:
> [...]
> > --- a/net/core/rtnetlink.c
> > +++ b/net/core/rtnetlink.c
> [...]
> > + case IFLA_VF_RATE: {
> > + struct ifla_vf_rate *ivt;
> > + struct ifla_vf_info ivf;
> > ivt = nla_data(vf);
> > err = -EOPNOTSUPP;
> > - if (ops->ndo_set_vf_tx_rate)
> > - err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
> > - ivt->rate);
> > + if ((ivt->min_tx_rate == -1 ||
> > + ivt->max_tx_rate == -1) &&
> > + ops->ndo_get_vf_config)
> > + err = ops->ndo_get_vf_config(dev, ivt->vf,
> > + &ivf);
> > + else
> > + err = 0;
> > + if (err)
> > + break;
> > + if (ivt->min_tx_rate == -1)
> > + ivt->min_tx_rate = ivf.min_tx_rate;
> > + if (ivt->max_tx_rate == -1)
> > + ivt->max_tx_rate = ivf.max_tx_rate;
> [...]
>
> This is modifying the the content of the netlink skb, which I think is
> not allowed. I think you need to use local variables for this instead.
>
> Also, this special-casing of -1 isn't documented anywhere. Is it even
> necessary? If userland needs to set just one limit, it can read the
> existing limits and set both.
>
> Ben.
>
> --
> Ben Hutchings
> Everything should be made as simple as possible, but not simpler.
> - Albert
> Einstein
Thanks Ben for your feedback.
I have used (-1) to differentiate if user does not want to set particular field.
For example: in case if user sets max_tx_rate and does not set min_tx_rate, then, we send max_tx_rate as set by user and min_tx_rate as -1.
Are you suggesting that in above scenario if user does not set min_tx_rate, then user space should get that value from driver and send same value to driver interface?
Also, user may want to set value 0 which should be differentiated from not setting any value.
Thanks,
Sucheta.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool.
2014-03-24 18:55 ` Ben Hutchings
2014-03-26 7:25 ` Sucheta Chakraborty
@ 2014-03-26 7:37 ` Michal Kubecek
2014-03-28 0:26 ` Ben Hutchings
1 sibling, 1 reply; 6+ messages in thread
From: Michal Kubecek @ 2014-03-26 7:37 UTC (permalink / raw)
To: Ben Hutchings
Cc: Sucheta Chakraborty, netdev, Dept-HSGLinuxNICDev, gregory.v.rose,
linux-net-drivers, Ariel.Elior, amirv
On Monday 24 of March 2014 18:55:00 Ben Hutchings wrote:
>
> Also, this special-casing of -1 isn't documented anywhere. Is it even
> necessary? If userland needs to set just one limit, it can read the
> existing limits and set both.
Wouldn't this open a window for a race if one process wanted to change
one limit and another process wanted to change the other at the same
time? Such scenario doesn't sound very realistic but our customers
taught me that things I don't find very realistic tend to be used quite
frequently by them.
On the other hand, if changing only one limit is going to be common, it
might be more appropriate to add IFLA_VF_TX_MIN_RATE instead and always
pass the minimum and maximum rate separately (and pass only one if only
one is going to be changed).
Michal Kubecek
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool.
2014-03-26 7:37 ` Michal Kubecek
@ 2014-03-28 0:26 ` Ben Hutchings
0 siblings, 0 replies; 6+ messages in thread
From: Ben Hutchings @ 2014-03-28 0:26 UTC (permalink / raw)
To: Michal Kubecek
Cc: Sucheta Chakraborty, netdev, Dept-HSGLinuxNICDev, gregory.v.rose,
linux-net-drivers, Ariel.Elior, amirv
[-- Attachment #1: Type: text/plain, Size: 1146 bytes --]
On Wed, 2014-03-26 at 08:37 +0100, Michal Kubecek wrote:
> On Monday 24 of March 2014 18:55:00 Ben Hutchings wrote:
> >
> > Also, this special-casing of -1 isn't documented anywhere. Is it even
> > necessary? If userland needs to set just one limit, it can read the
> > existing limits and set both.
>
> Wouldn't this open a window for a race if one process wanted to change
> one limit and another process wanted to change the other at the same
> time? Such scenario doesn't sound very realistic but our customers
> taught me that things I don't find very realistic tend to be used quite
> frequently by them.
If there are two processes trying to change the minimum and maximum
bandwidth of a VF at the same time, something has gone wrong already.
This is a problem for userland to solve.
Ben.
> On the other hand, if changing only one limit is going to be common, it
> might be more appropriate to add IFLA_VF_TX_MIN_RATE instead and always
> pass the minimum and maximum rate separately (and pass only one if only
> one is going to be changed).
--
Ben Hutchings
73.46% of all statistics are made up.
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-03-28 0:26 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-03-24 4:57 [RFC v2 0/1]: Add minimum bandwidth support in IP tool Sucheta Chakraborty
2014-03-24 4:57 ` [RFC v2 1/1] net: Add support to configure SR-IOV VF minimum and maximum Tx rate through ip tool Sucheta Chakraborty
2014-03-24 18:55 ` Ben Hutchings
2014-03-26 7:25 ` Sucheta Chakraborty
2014-03-26 7:37 ` Michal Kubecek
2014-03-28 0:26 ` Ben Hutchings
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