This patch does several things:
- introduces __ethtool_get_settings which is called from ethtool code and
from drivers as well. Put ASSERT_RTNL there.
- dev_ethtool_get_settings() is replaced by __ethtool_get_settings()
- changes calling in drivers so rtnl locking is respected. In
iboe_get_rate was previously ->get_settings() called unlocked. This
fixes it. Also prb_calc_retire_blk_tmo() in af_packet.c had the same
problem. Also fixed by calling __dev_get_by_index() instead of
dev_get_by_index() and holding rtnl_lock for both calls.
- introduces rtnl_lock in bnx2fc_vport_create() and fcoe_vport_create()
so bnx2fc_if_create() and fcoe_if_create() are called locked as they
are from other places.
- use __ethtool_get_settings() in bonding code
Signed-off-by: Jiri Pirko <jpirko@xxxxxxxxxx>
v2->v3:
-removed dev_ethtool_get_settings()
-added ASSERT_RTNL into __ethtool_get_settings()
-prb_calc_retire_blk_tmo - use __dev_get_by_index() and lock
around it and __ethtool_get_settings() call
v1->v2:
add missing export_symbol
---
arch/mips/txx9/generic/setup_tx4939.c | 2 +-
drivers/net/bonding/bond_main.c | 13 +++-----
drivers/net/macvlan.c | 3 +-
drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 4 ++-
drivers/scsi/fcoe/fcoe.c | 4 ++-
include/linux/ethtool.h | 3 ++
include/linux/netdevice.h | 3 --
include/rdma/ib_addr.h | 6 +++-
net/8021q/vlan_dev.c | 3 +-
net/bridge/br_if.c | 2 +-
net/core/dev.c | 24 ---------------
net/core/ethtool.c | 20 +++++++++---
net/core/net-sysfs.c | 4 +-
net/packet/af_packet.c | 52 +++++++++++++++++----------------
14 files changed, 69 insertions(+), 74 deletions(-)
diff --git a/arch/mips/txx9/generic/setup_tx4939.c b/arch/mips/txx9/generic/setup_tx4939.c
index e9f95dc..ba3cec3 100644
--- a/arch/mips/txx9/generic/setup_tx4939.c
+++ b/arch/mips/txx9/generic/setup_tx4939.c
@@ -321,7 +321,7 @@ void __init tx4939_sio_init(unsigned int sclk, unsigned int cts_mask)
static u32 tx4939_get_eth_speed(struct net_device *dev)
{
struct ethtool_cmd cmd;
- if (dev_ethtool_get_settings(dev, &cmd))
+ if (__ethtool_get_settings(dev, &cmd))
return 100; /* default 100Mbps */
return ethtool_cmd_speed(&cmd);
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 8cb75a6..1dcb07c 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -557,7 +557,7 @@ down:
static int bond_update_speed_duplex(struct slave *slave)
{
struct net_device *slave_dev = slave->dev;
- struct ethtool_cmd etool = { .cmd = ETHTOOL_GSET };
+ struct ethtool_cmd ecmd;
u32 slave_speed;
int res;
@@ -565,18 +565,15 @@ static int bond_update_speed_duplex(struct slave *slave)
slave->speed = SPEED_100;
slave->duplex = DUPLEX_FULL;
- if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
- return -1;
-
- res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
+ res = __ethtool_get_settings(slave_dev, &ecmd);
if (res < 0)
return -1;
- slave_speed = ethtool_cmd_speed(&etool);
+ slave_speed = ethtool_cmd_speed(&ecmd);
if (slave_speed == 0 || slave_speed == ((__u32) -1))
return -1;
- switch (etool.duplex) {
+ switch (ecmd.duplex) {
case DUPLEX_FULL:
case DUPLEX_HALF:
break;
@@ -585,7 +582,7 @@ static int bond_update_speed_duplex(struct slave *slave)
}
slave->speed = slave_speed;
- slave->duplex = etool.duplex;
+ slave->duplex = ecmd.duplex;
return 0;
}
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 836e13f..b100c90 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -543,7 +543,8 @@ static int macvlan_ethtool_get_settings(struct net_device *dev,
struct ethtool_cmd *cmd)
{
const struct macvlan_dev *vlan = netdev_priv(dev);
- return dev_ethtool_get_settings(vlan->lowerdev, cmd);
+
+ return __ethtool_get_settings(vlan->lowerdev, cmd);
}
static const struct ethtool_ops macvlan_ethtool_ops = {
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index 2c780a7..820a184 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
@@ -673,7 +673,7 @@ static void bnx2fc_link_speed_update(struct fc_lport *lport)
struct net_device *netdev = interface->netdev;
struct ethtool_cmd ecmd;
- if (!dev_ethtool_get_settings(netdev, &ecmd)) {
+ if (!__ethtool_get_settings(netdev, &ecmd)) {
lport->link_supported_speeds &=
~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
if (ecmd.supported & (SUPPORTED_1000baseT_Half |
@@ -1001,9 +1001,11 @@ static int bnx2fc_vport_create(struct fc_vport *vport, bool disabled)
"this interface\n");
return -EIO;
}
+ rtnl_lock();
mutex_lock(&bnx2fc_dev_lock);
vn_port = bnx2fc_if_create(interface, &vport->dev, 1);
mutex_unlock(&bnx2fc_dev_lock);
+ rtnl_unlock();
if (IS_ERR(vn_port)) {
printk(KERN_ERR PFX "bnx2fc_vport_create (%s) failed\n",
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 3416ab6..83aa3ac 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -2043,7 +2043,7 @@ int fcoe_link_speed_update(struct fc_lport *lport)
struct net_device *netdev = fcoe_netdev(lport);
struct ethtool_cmd ecmd;
- if (!dev_ethtool_get_settings(netdev, &ecmd)) {
+ if (!__ethtool_get_settings(netdev, &ecmd)) {
lport->link_supported_speeds &=
~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
if (ecmd.supported & (SUPPORTED_1000baseT_Half |
@@ -2452,7 +2452,9 @@ static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
}
mutex_lock(&fcoe_config_mutex);
+ rtnl_lock();
vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
+ rtnl_unlock();
mutex_unlock(&fcoe_config_mutex);
if (IS_ERR(vn_port)) {
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 3829712..8571f18 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -728,6 +728,9 @@ enum ethtool_sfeatures_retval_bits {
/* needed by dev_disable_lro() */
extern int __ethtool_set_flags(struct net_device *dev, u32 flags);
+extern int __ethtool_get_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd);
+
/**
* enum ethtool_phys_id_state - indicator state for physical identification
* @ETHTOOL_ID_INACTIVE: Physical ID indicator should be deactivated
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index dad7e4d..8b1080b 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2600,9 +2600,6 @@ static inline int netif_is_bond_slave(struct net_device *dev)
extern struct pernet_operations __net_initdata loopback_net_ops;
-int dev_ethtool_get_settings(struct net_device *dev,
- struct ethtool_cmd *cmd);
-
static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
{
if (dev->features & NETIF_F_RXCSUM)
diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index ae8c68f..639a449 100644
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -218,8 +218,12 @@ static inline int iboe_get_rate(struct net_device *dev)
{
struct ethtool_cmd cmd;
u32 speed;
+ int err;
- if (dev_ethtool_get_settings(dev, &cmd))
+ rtnl_lock();
+ err = __ethtool_get_settings(dev, &cmd);
+ rtnl_unlock();
+ if (err)
return IB_RATE_PORT_CURRENT;
speed = ethtool_cmd_speed(&cmd);
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index eba705b..c8cf939 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -610,7 +610,8 @@ static int vlan_ethtool_get_settings(struct net_device *dev,
struct ethtool_cmd *cmd)
{
const struct vlan_dev_info *vlan = vlan_dev_info(dev);
- return dev_ethtool_get_settings(vlan->real_dev, cmd);
+
+ return __ethtool_get_settings(vlan->real_dev, cmd);
}
static void vlan_ethtool_get_drvinfo(struct net_device *dev,
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index b365bba..043a5eb 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -35,7 +35,7 @@ static int port_cost(struct net_device *dev)
{
struct ethtool_cmd ecmd;
- if (!dev_ethtool_get_settings(dev, &ecmd)) {
+ if (!__ethtool_get_settings(dev, &ecmd)) {
switch (ethtool_cmd_speed(&ecmd)) {
case SPEED_10000:
return 2;
diff --git a/net/core/dev.c b/net/core/dev.c
index 11b0fc7..94f3254 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4566,30 +4566,6 @@ void dev_set_rx_mode(struct net_device *dev)
}
/**
- * dev_ethtool_get_settings - call device's ethtool_ops::get_settings()
- * @dev: device
- * @cmd: memory area for ethtool_ops::get_settings() result
- *
- * The cmd arg is initialized properly (cleared and
- * ethtool_cmd::cmd field set to ETHTOOL_GSET).
- *
- * Return device's ethtool_ops::get_settings() result value or
- * -EOPNOTSUPP when device doesn't expose
- * ethtool_ops::get_settings() operation.
- */
-int dev_ethtool_get_settings(struct net_device *dev,
- struct ethtool_cmd *cmd)
-{
- if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
- return -EOPNOTSUPP;
-
- memset(cmd, 0, sizeof(struct ethtool_cmd));
- cmd->cmd = ETHTOOL_GSET;
- return dev->ethtool_ops->get_settings(dev, cmd);
-}
-EXPORT_SYMBOL(dev_ethtool_get_settings);
-
-/**
* dev_get_flags - get flags reported to userspace
* @dev: device
*
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 6cdba5f..f444817 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -569,15 +569,25 @@ int __ethtool_set_flags(struct net_device *dev, u32 data)
return 0;
}
-static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
+int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
- struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
- int err;
+ ASSERT_RTNL();
- if (!dev->ethtool_ops->get_settings)
+ if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
return -EOPNOTSUPP;
- err = dev->ethtool_ops->get_settings(dev, &cmd);
+ memset(cmd, 0, sizeof(struct ethtool_cmd));
+ cmd->cmd = ETHTOOL_GSET;
+ return dev->ethtool_ops->get_settings(dev, cmd);
+}
+EXPORT_SYMBOL(__ethtool_get_settings);
+
+static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
+{
+ int err;
+ struct ethtool_cmd cmd;
+
+ err = __ethtool_get_settings(dev, &cmd);
if (err < 0)
return err;
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 90fdb46..48e6279 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -172,7 +172,7 @@ static ssize_t show_speed(struct device *dev,
if (netif_running(netdev)) {
struct ethtool_cmd cmd;
- if (!dev_ethtool_get_settings(netdev, &cmd))
+ if (!__ethtool_get_settings(netdev, &cmd))
ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));
}
rtnl_unlock();
@@ -190,7 +190,7 @@ static ssize_t show_duplex(struct device *dev,
if (netif_running(netdev)) {
struct ethtool_cmd cmd;
- if (!dev_ethtool_get_settings(netdev, &cmd))
+ if (!__ethtool_get_settings(netdev, &cmd))
ret = sprintf(buf, "%s\n",
cmd.duplex ? "full" : "half");
}
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 2ea3d63..25e68f5 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -530,33 +530,35 @@ static int prb_calc_retire_blk_tmo(struct packet_sock *po,
{
struct net_device *dev;
unsigned int mbits = 0, msec = 0, div = 0, tmo = 0;
+ struct ethtool_cmd ecmd;
+ int err;
- dev = dev_get_by_index(sock_net(&po->sk), po->ifindex);
- if (unlikely(dev == NULL))
+ rtnl_lock();
+ dev = __dev_get_by_index(sock_net(&po->sk), po->ifindex);
+ if (unlikely(!dev)) {
+ rtnl_unlock();
return DEFAULT_PRB_RETIRE_TOV;
-
- if (dev->ethtool_ops && dev->ethtool_ops->get_settings) {
- struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET, };
-
- if (!dev->ethtool_ops->get_settings(dev, &ecmd)) {
- switch (ecmd.speed) {
- case SPEED_10000:
- msec = 1;
- div = 10000/1000;
- break;
- case SPEED_1000:
- msec = 1;
- div = 1000/1000;
- break;
- /*
- * If the link speed is so slow you don't really
- * need to worry about perf anyways
- */
- case SPEED_100:
- case SPEED_10:
- default:
- return DEFAULT_PRB_RETIRE_TOV;
- }
+ }
+ err = __ethtool_get_settings(dev, &ecmd);
+ rtnl_unlock();
+ if (!err) {
+ switch (ecmd.speed) {
+ case SPEED_10000:
+ msec = 1;
+ div = 10000/1000;
+ break;
+ case SPEED_1000:
+ msec = 1;
+ div = 1000/1000;
+ break;
+ /*
+ * If the link speed is so slow you don't really
+ * need to worry about perf anyways
+ */
+ case SPEED_100:
+ case SPEED_10:
+ default:
+ return DEFAULT_PRB_RETIRE_TOV;
}
}
--
1.7.6
