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authorAlexander Lobakin2024-03-27 16:23:52 +0100
committerDavid S. Miller2024-04-01 10:49:28 +0100
commit117aef12a7b1b797bce9f66b156c65eab850b5b5 (patch)
tree8f5186e9ab168c13efd543f98933afa7b4cf26ec /drivers/net
parent7adaf37f7f104a7ee5f150af491674ccbbfc4114 (diff)
ip_tunnel: use a separate struct to store tunnel params in the kernel
Unlike IPv6 tunnels which use purely-kernel __ip6_tnl_parm structure to store params inside the kernel, IPv4 tunnel code uses the same ip_tunnel_parm which is being used to talk with the userspace. This makes it difficult to alter or add any fields or use a different format for whatever data. Define struct ip_tunnel_parm_kern, a 1:1 copy of ip_tunnel_parm for now, and use it throughout the code. Define the pieces, where the copy user <-> kernel happens, as standalone functions, and copy the data there field-by-field, so that the kernel-side structure could be easily modified later on and the users wouldn't have to care about this. Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c30
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h2
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c4
3 files changed, 20 insertions, 16 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
index 3340b4a694c3..d67df358a52f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
@@ -8,7 +8,7 @@
#include "spectrum_ipip.h"
#include "reg.h"
-struct ip_tunnel_parm
+struct ip_tunnel_parm_kern
mlxsw_sp_ipip_netdev_parms4(const struct net_device *ol_dev)
{
struct ip_tunnel *tun = netdev_priv(ol_dev);
@@ -24,7 +24,8 @@ mlxsw_sp_ipip_netdev_parms6(const struct net_device *ol_dev)
return tun->parms;
}
-static bool mlxsw_sp_ipip_parms4_has_ikey(const struct ip_tunnel_parm *parms)
+static bool
+mlxsw_sp_ipip_parms4_has_ikey(const struct ip_tunnel_parm_kern *parms)
{
return !!(parms->i_flags & TUNNEL_KEY);
}
@@ -34,7 +35,8 @@ static bool mlxsw_sp_ipip_parms6_has_ikey(const struct __ip6_tnl_parm *parms)
return !!(parms->i_flags & TUNNEL_KEY);
}
-static bool mlxsw_sp_ipip_parms4_has_okey(const struct ip_tunnel_parm *parms)
+static bool
+mlxsw_sp_ipip_parms4_has_okey(const struct ip_tunnel_parm_kern *parms)
{
return !!(parms->o_flags & TUNNEL_KEY);
}
@@ -44,7 +46,7 @@ static bool mlxsw_sp_ipip_parms6_has_okey(const struct __ip6_tnl_parm *parms)
return !!(parms->o_flags & TUNNEL_KEY);
}
-static u32 mlxsw_sp_ipip_parms4_ikey(const struct ip_tunnel_parm *parms)
+static u32 mlxsw_sp_ipip_parms4_ikey(const struct ip_tunnel_parm_kern *parms)
{
return mlxsw_sp_ipip_parms4_has_ikey(parms) ?
be32_to_cpu(parms->i_key) : 0;
@@ -56,7 +58,7 @@ static u32 mlxsw_sp_ipip_parms6_ikey(const struct __ip6_tnl_parm *parms)
be32_to_cpu(parms->i_key) : 0;
}
-static u32 mlxsw_sp_ipip_parms4_okey(const struct ip_tunnel_parm *parms)
+static u32 mlxsw_sp_ipip_parms4_okey(const struct ip_tunnel_parm_kern *parms)
{
return mlxsw_sp_ipip_parms4_has_okey(parms) ?
be32_to_cpu(parms->o_key) : 0;
@@ -69,7 +71,7 @@ static u32 mlxsw_sp_ipip_parms6_okey(const struct __ip6_tnl_parm *parms)
}
static union mlxsw_sp_l3addr
-mlxsw_sp_ipip_parms4_saddr(const struct ip_tunnel_parm *parms)
+mlxsw_sp_ipip_parms4_saddr(const struct ip_tunnel_parm_kern *parms)
{
return (union mlxsw_sp_l3addr) { .addr4 = parms->iph.saddr };
}
@@ -81,7 +83,7 @@ mlxsw_sp_ipip_parms6_saddr(const struct __ip6_tnl_parm *parms)
}
static union mlxsw_sp_l3addr
-mlxsw_sp_ipip_parms4_daddr(const struct ip_tunnel_parm *parms)
+mlxsw_sp_ipip_parms4_daddr(const struct ip_tunnel_parm_kern *parms)
{
return (union mlxsw_sp_l3addr) { .addr4 = parms->iph.daddr };
}
@@ -96,7 +98,7 @@ union mlxsw_sp_l3addr
mlxsw_sp_ipip_netdev_saddr(enum mlxsw_sp_l3proto proto,
const struct net_device *ol_dev)
{
- struct ip_tunnel_parm parms4;
+ struct ip_tunnel_parm_kern parms4;
struct __ip6_tnl_parm parms6;
switch (proto) {
@@ -115,7 +117,9 @@ mlxsw_sp_ipip_netdev_saddr(enum mlxsw_sp_l3proto proto,
static __be32 mlxsw_sp_ipip_netdev_daddr4(const struct net_device *ol_dev)
{
- struct ip_tunnel_parm parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev);
+ struct ip_tunnel_parm_kern parms4;
+
+ parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev);
return mlxsw_sp_ipip_parms4_daddr(&parms4).addr4;
}
@@ -124,7 +128,7 @@ static union mlxsw_sp_l3addr
mlxsw_sp_ipip_netdev_daddr(enum mlxsw_sp_l3proto proto,
const struct net_device *ol_dev)
{
- struct ip_tunnel_parm parms4;
+ struct ip_tunnel_parm_kern parms4;
struct __ip6_tnl_parm parms6;
switch (proto) {
@@ -150,7 +154,7 @@ bool mlxsw_sp_l3addr_is_zero(union mlxsw_sp_l3addr addr)
static struct mlxsw_sp_ipip_parms
mlxsw_sp_ipip_netdev_parms_init_gre4(const struct net_device *ol_dev)
{
- struct ip_tunnel_parm parms = mlxsw_sp_ipip_netdev_parms4(ol_dev);
+ struct ip_tunnel_parm_kern parms = mlxsw_sp_ipip_netdev_parms4(ol_dev);
return (struct mlxsw_sp_ipip_parms) {
.proto = MLXSW_SP_L3_PROTO_IPV4,
@@ -187,8 +191,8 @@ mlxsw_sp_ipip_decap_config_gre4(struct mlxsw_sp *mlxsw_sp,
{
u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
u16 ul_rif_id = mlxsw_sp_ipip_lb_ul_rif_id(ipip_entry->ol_lb);
+ struct ip_tunnel_parm_kern parms;
char rtdp_pl[MLXSW_REG_RTDP_LEN];
- struct ip_tunnel_parm parms;
unsigned int type_check;
bool has_ikey;
u32 daddr4;
@@ -252,7 +256,7 @@ static struct mlxsw_sp_rif_ipip_lb_config
mlxsw_sp_ipip_ol_loopback_config_gre4(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ol_dev)
{
- struct ip_tunnel_parm parms = mlxsw_sp_ipip_netdev_parms4(ol_dev);
+ struct ip_tunnel_parm_kern parms = mlxsw_sp_ipip_netdev_parms4(ol_dev);
enum mlxsw_reg_ritr_loopback_ipip_type lb_ipipt;
lb_ipipt = mlxsw_sp_ipip_parms4_has_okey(&parms) ?
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
index a35f009da561..a66173779641 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
@@ -9,7 +9,7 @@
#include <linux/if_tunnel.h>
#include <net/ip6_tunnel.h>
-struct ip_tunnel_parm
+struct ip_tunnel_parm_kern
mlxsw_sp_ipip_netdev_parms4(const struct net_device *ol_dev);
struct __ip6_tnl_parm
mlxsw_sp_ipip_netdev_parms6(const struct net_device *ol_dev);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index af50ff9e5f26..f0cbc6b9b041 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -413,8 +413,8 @@ mlxsw_sp_span_gretap4_route(const struct net_device *to_dev,
__be32 *saddrp, __be32 *daddrp)
{
struct ip_tunnel *tun = netdev_priv(to_dev);
+ struct ip_tunnel_parm_kern parms;
struct net_device *dev = NULL;
- struct ip_tunnel_parm parms;
struct rtable *rt = NULL;
struct flowi4 fl4;
@@ -451,7 +451,7 @@ mlxsw_sp_span_entry_gretap4_parms(struct mlxsw_sp *mlxsw_sp,
const struct net_device *to_dev,
struct mlxsw_sp_span_parms *sparmsp)
{
- struct ip_tunnel_parm tparm = mlxsw_sp_ipip_netdev_parms4(to_dev);
+ struct ip_tunnel_parm_kern tparm = mlxsw_sp_ipip_netdev_parms4(to_dev);
union mlxsw_sp_l3addr saddr = { .addr4 = tparm.iph.saddr };
union mlxsw_sp_l3addr daddr = { .addr4 = tparm.iph.daddr };
bool inherit_tos = tparm.iph.tos & 0x1;