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mlxsw: spectrum_router: Add private neigh table 

We need to hold some private data for every neigh entry. It would be
possible to do it using neigh_priv_len/ndo_neigh_construct/
ndo_neigh_destroy however only for the port device itself. That would not
work for stacked devices like bridge/team/bond. So introduce a private
neigh table. Hook onto ndos neigh_construct/destroy and add/remove
table entry according to that.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2016-07-05 11:27:39 +02:00 committed by David S. Miller
parent 18bfb924f0
commit 6cf3c971dc
3 changed files with 153 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -803,6 +803,8 @@ static const struct net_device_ops mlxsw_sp_port_netdev_ops = {
.ndo_get_stats64 = mlxsw_sp_port_get_stats64,
.ndo_vlan_rx_add_vid = mlxsw_sp_port_add_vid,
.ndo_vlan_rx_kill_vid = mlxsw_sp_port_kill_vid,
.ndo_neigh_construct = mlxsw_sp_router_neigh_construct,
.ndo_neigh_destroy = mlxsw_sp_router_neigh_destroy,
.ndo_fdb_add = switchdev_port_fdb_add,
.ndo_fdb_del = switchdev_port_fdb_del,
.ndo_fdb_dump = switchdev_port_fdb_dump,

6
drivers/net/ethernet/mellanox/mlxsw/spectrum.h
View File

@ -39,6 +39,7 @@
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/rhashtable.h>
#include <linux/bitops.h>
#include <linux/if_vlan.h>
#include <linux/list.h>
@ -212,6 +213,7 @@ struct mlxsw_sp_vr {
struct mlxsw_sp_router {
struct mlxsw_sp_lpm_tree lpm_trees[MLXSW_SP_LPM_TREE_COUNT];
struct mlxsw_sp_vr vrs[MLXSW_SP_VIRTUAL_ROUTER_MAX];
struct rhashtable neigh_ht;
};
struct mlxsw_sp {
@ -524,5 +526,9 @@ int mlxsw_sp_router_fib4_add(struct mlxsw_sp_port *mlxsw_sp_port,
struct switchdev_trans *trans);
int mlxsw_sp_router_fib4_del(struct mlxsw_sp_port *mlxsw_sp_port,
const struct switchdev_obj_ipv4_fib *fib4);
int mlxsw_sp_router_neigh_construct(struct net_device *dev,
struct neighbour *n);
void mlxsw_sp_router_neigh_destroy(struct net_device *dev,
struct neighbour *n);
#endif

146
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@ -38,6 +38,8 @@
#include <linux/rhashtable.h>
#include <linux/bitops.h>
#include <linux/in6.h>
#include <net/neighbour.h>
#include <net/arp.h>
#include "spectrum.h"
#include "core.h"
@ -544,6 +546,147 @@ static void mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp)
}
}
struct mlxsw_sp_neigh_key {
unsigned char addr[sizeof(struct in6_addr)];
struct net_device *dev;
};
struct mlxsw_sp_neigh_entry {
struct rhash_head ht_node;
struct mlxsw_sp_neigh_key key;
u16 rif;
struct neighbour *n;
};
static const struct rhashtable_params mlxsw_sp_neigh_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_neigh_entry, key),
.head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node),
.key_len = sizeof(struct mlxsw_sp_neigh_key),
};
static int
mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
return rhashtable_insert_fast(&mlxsw_sp->router.neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
rhashtable_remove_fast(&mlxsw_sp->router.neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_create(const void *addr, size_t addr_len,
struct net_device *dev, u16 rif,
struct neighbour *n)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_ATOMIC);
if (!neigh_entry)
return NULL;
memcpy(neigh_entry->key.addr, addr, addr_len);
neigh_entry->key.dev = dev;
neigh_entry->rif = rif;
neigh_entry->n = n;
return neigh_entry;
}
static void
mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp_neigh_entry *neigh_entry)
{
kfree(neigh_entry);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, const void *addr,
size_t addr_len, struct net_device *dev)
{
struct mlxsw_sp_neigh_key key = {{ 0 } };
memcpy(key.addr, addr, addr_len);
key.dev = dev;
return rhashtable_lookup_fast(&mlxsw_sp->router.neigh_ht,
&key, mlxsw_sp_neigh_ht_params);
}
int mlxsw_sp_router_neigh_construct(struct net_device *dev,
struct neighbour *n)
{
struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_rif *r;
u32 dip;
int err;
if (n->tbl != &arp_tbl)
return 0;
dip = ntohl(*((__be32 *) n->primary_key));
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, &dip, sizeof(dip),
n->dev);
if (neigh_entry) {
WARN_ON(neigh_entry->n != n);
return 0;
}
r = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (WARN_ON(!r))
return -EINVAL;
neigh_entry = mlxsw_sp_neigh_entry_create(&dip, sizeof(dip), n->dev,
r->rif, n);
if (!neigh_entry)
return -ENOMEM;
err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
if (err)
goto err_neigh_entry_insert;
return 0;
err_neigh_entry_insert:
mlxsw_sp_neigh_entry_destroy(neigh_entry);
return err;
}
void mlxsw_sp_router_neigh_destroy(struct net_device *dev,
struct neighbour *n)
{
struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_neigh_entry *neigh_entry;
u32 dip;
if (n->tbl != &arp_tbl)
return;
dip = ntohl(*((__be32 *) n->primary_key));
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, &dip, sizeof(dip),
n->dev);
if (!neigh_entry)
return;
mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_destroy(neigh_entry);
}
static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp)
{
return rhashtable_init(&mlxsw_sp->router.neigh_ht,
&mlxsw_sp_neigh_ht_params);
}
static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp)
{
rhashtable_destroy(&mlxsw_sp->router.neigh_ht);
}
static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp)
{
char rgcr_pl[MLXSW_REG_RGCR_LEN];
@ -570,11 +713,12 @@ int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp)
return err;
mlxsw_sp_lpm_init(mlxsw_sp);
mlxsw_sp_vrs_init(mlxsw_sp);
return 0;
return mlxsw_sp_neigh_init(mlxsw_sp);
}
void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
{
mlxsw_sp_neigh_fini(mlxsw_sp);
__mlxsw_sp_router_fini(mlxsw_sp);
}