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mlxsw: spectrum_router: Store routes in a more generic way 

Up until now, the only FIB entries that were associated with a nexthop
group were routes to remote networks where all the nexthop devices had a
valid router interface (RIF). This is in contrast to the FIB code,
where all the routes are associated with a FIB info. The same design
choice needs to be applied to the driver's cache.

Based on the NH_{ADD,DEL} events which will be added later in the
patchset, we need to be able to change the action (forward / trap)
associated with all the routes using the nexthop group. However, if we
can't link between the nexthop and the routes using it, then the above
is impossible.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2017-02-08 11:16:33 +01:00 committed by David S. Miller
parent b3e8d1ebad
commit b8399a1e5a
1 changed files with 27 additions and 13 deletions
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40
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@ -127,7 +127,6 @@ struct mlxsw_sp_fib_entry {
struct mlxsw_sp_fib_key key;
enum mlxsw_sp_fib_entry_type type;
unsigned int ref_count;
u16 rif; /* used for action local */
struct mlxsw_sp_vr *vr;
struct fib_info *fi;
struct list_head nexthop_group_node;
@ -1101,6 +1100,7 @@ struct mlxsw_sp_nexthop {
*/
struct rhash_head ht_node;
struct mlxsw_sp_nexthop_key key;
struct mlxsw_sp_rif *r;
u8 should_offload:1, /* set indicates this neigh is connected and
* should be put to KVD linear area of this group.
*/
@ -1127,6 +1127,7 @@ struct mlxsw_sp_nexthop_group {
u16 ecmp_size;
u16 count;
struct mlxsw_sp_nexthop nexthops[0];
#define nh_rif nexthops[0].r
};
static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = {
@ -1414,15 +1415,25 @@ static int mlxsw_sp_nexthop_init(struct mlxsw_sp *mlxsw_sp,
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct net_device *dev = fib_nh->nh_dev;
struct mlxsw_sp_rif *r;
struct neighbour *n;
u8 nud_state, dead;
int err;
nh->nh_grp = nh_grp;
nh->key.fib_nh = fib_nh;
err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh);
if (err)
return err;
r = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!r)
return 0;
nh->r = r;
if (!nh_grp->gateway)
return 0;
/* Take a reference of neigh here ensuring that neigh would
* not be detructed before the nexthop entry is finished.
* The reference is taken either in neigh_lookup() or
@ -1453,7 +1464,6 @@ static int mlxsw_sp_nexthop_init(struct mlxsw_sp *mlxsw_sp,
list_add_tail(&neigh_entry->nexthop_neighs_list_node,
&mlxsw_sp->router.nexthop_neighs_list);
nh->nh_grp = nh_grp;
nh->neigh_entry = neigh_entry;
list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list);
read_lock_bh(&n->lock);
@ -1477,6 +1487,9 @@ static void mlxsw_sp_nexthop_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
struct neighbour *n = neigh_entry->key.n;
if (!neigh_entry)
goto out;
__mlxsw_sp_nexthop_neigh_update(nh, true);
list_del(&nh->neigh_list_node);
nh->neigh_entry = NULL;
@ -1492,6 +1505,7 @@ static void mlxsw_sp_nexthop_fini(struct mlxsw_sp *mlxsw_sp,
neigh_release(n);
out:
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
}
@ -1619,6 +1633,7 @@ static int mlxsw_sp_fib_entry_op4_local(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_rif *r = fib_entry->nh_group->nh_rif;
char ralue_pl[MLXSW_REG_RALUE_LEN];
u32 *p_dip = (u32 *) fib_entry->key.addr;
struct mlxsw_sp_vr *vr = fib_entry->vr;
@ -1628,7 +1643,7 @@ static int mlxsw_sp_fib_entry_op4_local(struct mlxsw_sp *mlxsw_sp,
vr->id, fib_entry->key.prefix_len, *p_dip);
mlxsw_reg_ralue_act_local_pack(ralue_pl,
MLXSW_REG_RALUE_TRAP_ACTION_NOP, 0,
fib_entry->rif);
r->rif);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
@ -1697,7 +1712,6 @@ mlxsw_sp_router_fib4_entry_init(struct mlxsw_sp *mlxsw_sp,
struct fib_info *fi = fen_info->fi;
struct mlxsw_sp_rif *r = NULL;
int nhsel;
int err;
if (fen_info->type == RTN_LOCAL || fen_info->type == RTN_BROADCAST) {
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
@ -1728,15 +1742,10 @@ mlxsw_sp_router_fib4_entry_init(struct mlxsw_sp *mlxsw_sp,
return 0;
}
if (fi->fib_nh->nh_scope != RT_SCOPE_LINK) {
if (fi->fib_nh->nh_scope != RT_SCOPE_LINK)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL;
fib_entry->rif = r->rif;
} else {
else
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE;
err = mlxsw_sp_nexthop_group_get(mlxsw_sp, fib_entry, fi);
if (err)
return err;
}
fib_info_offload_inc(fen_info->fi);
return 0;
}
@ -1747,8 +1756,6 @@ mlxsw_sp_router_fib4_entry_fini(struct mlxsw_sp *mlxsw_sp,
{
if (fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP)
fib_info_offload_dec(fib_entry->fi);
if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_REMOTE)
mlxsw_sp_nexthop_group_put(mlxsw_sp, fib_entry);
}
static struct mlxsw_sp_fib_entry *
@ -1788,8 +1795,14 @@ mlxsw_sp_fib_entry_get(struct mlxsw_sp *mlxsw_sp,
if (err)
goto err_fib4_entry_init;
err = mlxsw_sp_nexthop_group_get(mlxsw_sp, fib_entry, fi);
if (err)
goto err_nexthop_group_get;
return fib_entry;
err_nexthop_group_get:
mlxsw_sp_router_fib4_entry_fini(mlxsw_sp, fib_entry);
err_fib4_entry_init:
mlxsw_sp_fib_entry_destroy(fib_entry);
err_fib_entry_create:
@ -1821,6 +1834,7 @@ static void mlxsw_sp_fib_entry_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr = fib_entry->vr;
if (--fib_entry->ref_count == 0) {
mlxsw_sp_nexthop_group_put(mlxsw_sp, fib_entry);
mlxsw_sp_router_fib4_entry_fini(mlxsw_sp, fib_entry);
mlxsw_sp_fib_entry_destroy(fib_entry);
}