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bonding/xfrm: use real_dev instead of slave_dev
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Rather than requiring every hw crypto capable NIC driver to do a check for
slave_dev being set, set real_dev in the xfrm layer and xso init time, and
then override it in the bonding driver as needed. Then NIC drivers can
always use real_dev, and at the same time, we eliminate the use of a
variable name that probably shouldn't have been used in the first place,
particularly given recent current events.

CC: Boris Pismenny <borisp@mellanox.com>
CC: Saeed Mahameed <saeedm@mellanox.com>
CC: Leon Romanovsky <leon@kernel.org>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Jakub Kicinski <kuba@kernel.org>
CC: Steffen Klassert <steffen.klassert@secunet.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: netdev@vger.kernel.org
Suggested-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jarod Wilson authored and David S. Miller committed Jun 23, 2020
1 parent 2d538c1 commit bdfd2d1
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Showing 5 changed files with 21 additions and 49 deletions.
6 changes: 3 additions & 3 deletions drivers/net/bonding/bond_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -386,7 +386,7 @@ static int bond_ipsec_add_sa(struct xfrm_state *xs)
struct bonding *bond = netdev_priv(bond_dev);
struct slave *slave = rtnl_dereference(bond->curr_active_slave);

xs->xso.slave_dev = slave->dev;
xs->xso.real_dev = slave->dev;
bond->xs = xs;

if (!(slave->dev->xfrmdev_ops
Expand All @@ -411,7 +411,7 @@ static void bond_ipsec_del_sa(struct xfrm_state *xs)
if (!slave)
return;

xs->xso.slave_dev = slave->dev;
xs->xso.real_dev = slave->dev;

if (!(slave->dev->xfrmdev_ops
&& slave->dev->xfrmdev_ops->xdo_dev_state_delete)) {
Expand Down Expand Up @@ -440,7 +440,7 @@ static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
return false;
}

xs->xso.slave_dev = slave_dev;
xs->xso.real_dev = slave_dev;
return slave_dev->xfrmdev_ops->xdo_dev_offload_ok(skb, xs);
}

Expand Down
47 changes: 12 additions & 35 deletions drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
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Original file line number Diff line number Diff line change
Expand Up @@ -427,14 +427,11 @@ static struct xfrm_state *ixgbe_ipsec_find_rx_state(struct ixgbe_ipsec *ipsec,
static int ixgbe_ipsec_parse_proto_keys(struct xfrm_state *xs,
u32 *mykey, u32 *mysalt)
{
struct net_device *dev = xs->xso.dev;
struct net_device *dev = xs->xso.real_dev;
unsigned char *key_data;
char *alg_name = NULL;
int key_len;

if (xs->xso.slave_dev)
dev = xs->xso.slave_dev;

if (!xs->aead) {
netdev_err(dev, "Unsupported IPsec algorithm\n");
return -EINVAL;
Expand Down Expand Up @@ -480,9 +477,9 @@ static int ixgbe_ipsec_parse_proto_keys(struct xfrm_state *xs,
**/
static int ixgbe_ipsec_check_mgmt_ip(struct xfrm_state *xs)
{
struct net_device *dev = xs->xso.dev;
struct ixgbe_adapter *adapter;
struct ixgbe_hw *hw;
struct net_device *dev = xs->xso.real_dev;
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_hw *hw = &adapter->hw;
u32 mfval, manc, reg;
int num_filters = 4;
bool manc_ipv4;
Expand All @@ -500,12 +497,6 @@ static int ixgbe_ipsec_check_mgmt_ip(struct xfrm_state *xs)
#define BMCIP_V6 0x3
#define BMCIP_MASK 0x3

if (xs->xso.slave_dev)
dev = xs->xso.slave_dev;

adapter = netdev_priv(dev);
hw = &adapter->hw;

manc = IXGBE_READ_REG(hw, IXGBE_MANC);
manc_ipv4 = !!(manc & MANC_EN_IPV4_FILTER);
mfval = IXGBE_READ_REG(hw, IXGBE_MFVAL);
Expand Down Expand Up @@ -569,22 +560,15 @@ static int ixgbe_ipsec_check_mgmt_ip(struct xfrm_state *xs)
**/
static int ixgbe_ipsec_add_sa(struct xfrm_state *xs)
{
struct net_device *dev = xs->xso.dev;
struct ixgbe_adapter *adapter;
struct ixgbe_ipsec *ipsec;
struct ixgbe_hw *hw;
struct net_device *dev = xs->xso.real_dev;
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_ipsec *ipsec = adapter->ipsec;
struct ixgbe_hw *hw = &adapter->hw;
int checked, match, first;
u16 sa_idx;
int ret;
int i;

if (xs->xso.slave_dev)
dev = xs->xso.slave_dev;

adapter = netdev_priv(dev);
ipsec = adapter->ipsec;
hw = &adapter->hw;

if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) {
netdev_err(dev, "Unsupported protocol 0x%04x for ipsec offload\n",
xs->id.proto);
Expand Down Expand Up @@ -761,20 +745,13 @@ static int ixgbe_ipsec_add_sa(struct xfrm_state *xs)
**/
static void ixgbe_ipsec_del_sa(struct xfrm_state *xs)
{
struct net_device *dev = xs->xso.dev;
struct ixgbe_adapter *adapter;
struct ixgbe_ipsec *ipsec;
struct ixgbe_hw *hw;
struct net_device *dev = xs->xso.real_dev;
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_ipsec *ipsec = adapter->ipsec;
struct ixgbe_hw *hw = &adapter->hw;
u32 zerobuf[4] = {0, 0, 0, 0};
u16 sa_idx;

if (xs->xso.slave_dev)
dev = xs->xso.slave_dev;

adapter = netdev_priv(dev);
ipsec = adapter->ipsec;
hw = &adapter->hw;

if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) {
struct rx_sa *rsa;
u8 ipi;
Expand Down
10 changes: 2 additions & 8 deletions drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
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Original file line number Diff line number Diff line change
Expand Up @@ -207,12 +207,9 @@ mlx5e_ipsec_build_accel_xfrm_attrs(struct mlx5e_ipsec_sa_entry *sa_entry,

static inline int mlx5e_xfrm_validate_state(struct xfrm_state *x)
{
struct net_device *netdev = x->xso.dev;
struct net_device *netdev = x->xso.real_dev;
struct mlx5e_priv *priv;

if (x->xso.slave_dev)
netdev = x->xso.slave_dev;

priv = netdev_priv(netdev);

if (x->props.aalgo != SADB_AALG_NONE) {
Expand Down Expand Up @@ -288,15 +285,12 @@ static inline int mlx5e_xfrm_validate_state(struct xfrm_state *x)
static int mlx5e_xfrm_add_state(struct xfrm_state *x)
{
struct mlx5e_ipsec_sa_entry *sa_entry = NULL;
struct net_device *netdev = x->xso.dev;
struct net_device *netdev = x->xso.real_dev;
struct mlx5_accel_esp_xfrm_attrs attrs;
struct mlx5e_priv *priv;
unsigned int sa_handle;
int err;

if (x->xso.slave_dev)
netdev = x->xso.slave_dev;

priv = netdev_priv(netdev);

err = mlx5e_xfrm_validate_state(x);
Expand Down
2 changes: 1 addition & 1 deletion include/net/xfrm.h
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,7 @@ struct xfrm_state_walk {

struct xfrm_state_offload {
struct net_device *dev;
struct net_device *slave_dev;
struct net_device *real_dev;
unsigned long offload_handle;
unsigned int num_exthdrs;
u8 flags;
Expand Down
5 changes: 3 additions & 2 deletions net/xfrm/xfrm_device.c
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Original file line number Diff line number Diff line change
Expand Up @@ -120,8 +120,8 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
if (xo->flags & XFRM_GRO || x->xso.flags & XFRM_OFFLOAD_INBOUND)
return skb;

/* This skb was already validated on the master dev */
if ((x->xso.dev != dev) && (x->xso.slave_dev == dev))
/* This skb was already validated on the upper/virtual dev */
if ((x->xso.dev != dev) && (x->xso.real_dev == dev))
return skb;

local_irq_save(flags);
Expand Down Expand Up @@ -259,6 +259,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
}

xso->dev = dev;
xso->real_dev = dev;
xso->num_exthdrs = 1;
xso->flags = xuo->flags;

Expand Down

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