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mlxsw: spectrum_router: Allow appending to dev-only routes 

Commit f34436a430 ("net/ipv6: Simplify route replace and appending
into multipath route") changed the IPv6 route append logic so that
dev-only routes can be appended and not only gatewayed routes.

Align mlxsw with the new behaviour.

Fixes: f34436a430 ("net/ipv6: Simplify route replace and appending into multipath route")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2018-06-15 16:23:36 +03:00 committed by David S. Miller
parent 6eba08c362
commit 53b562df8c
1 changed files with 19 additions and 8 deletions
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27
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
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@ -4771,11 +4771,11 @@ mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry)
static struct mlxsw_sp_fib6_entry * static struct mlxsw_sp_fib6_entry *
mlxsw_sp_fib6_node_mp_entry_find(const struct mlxsw_sp_fib_node *fib_node, mlxsw_sp_fib6_node_mp_entry_find(const struct mlxsw_sp_fib_node *fib_node,
const struct fib6_info *nrt, bool replace) const struct fib6_info *nrt, bool append)
{ {
struct mlxsw_sp_fib6_entry *fib6_entry; struct mlxsw_sp_fib6_entry *fib6_entry;
if (!mlxsw_sp_fib6_rt_can_mp(nrt) || replace) if (!append)
return NULL; return NULL;
list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) {
@ -4790,8 +4790,7 @@ mlxsw_sp_fib6_node_mp_entry_find(const struct mlxsw_sp_fib_node *fib_node,
break; break;
if (rt->fib6_metric < nrt->fib6_metric) if (rt->fib6_metric < nrt->fib6_metric)
continue; continue;
if (rt->fib6_metric == nrt->fib6_metric && if (rt->fib6_metric == nrt->fib6_metric)
mlxsw_sp_fib6_rt_can_mp(rt))
return fib6_entry; return fib6_entry;
if (rt->fib6_metric > nrt->fib6_metric) if (rt->fib6_metric > nrt->fib6_metric)
break; break;
@ -5316,7 +5315,8 @@ static void mlxsw_sp_fib6_entry_replace(struct mlxsw_sp *mlxsw_sp,
} }
static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp, static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp,
struct fib6_info *rt, bool replace) struct fib6_info *rt, bool replace,
bool append)
{ {
struct mlxsw_sp_fib6_entry *fib6_entry; struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_fib_node *fib_node; struct mlxsw_sp_fib_node *fib_node;
@ -5342,7 +5342,7 @@ static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp,
/* Before creating a new entry, try to append route to an existing /* Before creating a new entry, try to append route to an existing
* multipath entry. * multipath entry.
*/ */
fib6_entry = mlxsw_sp_fib6_node_mp_entry_find(fib_node, rt, replace); fib6_entry = mlxsw_sp_fib6_node_mp_entry_find(fib_node, rt, append);
if (fib6_entry) { if (fib6_entry) {
err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt); err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt);
if (err) if (err)
@ -5350,6 +5350,14 @@ static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp,
return 0; return 0;
} }
/* We received an append event, yet did not find any route to
* append to.
*/
if (WARN_ON(append)) {
err = -EINVAL;
goto err_fib6_entry_append;
}
fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt); fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt);
if (IS_ERR(fib6_entry)) { if (IS_ERR(fib6_entry)) {
err = PTR_ERR(fib6_entry); err = PTR_ERR(fib6_entry);
@ -5367,6 +5375,7 @@ static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp,
err_fib6_node_entry_link: err_fib6_node_entry_link:
mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry);
err_fib6_entry_create: err_fib6_entry_create:
err_fib6_entry_append:
err_fib6_entry_nexthop_add: err_fib6_entry_nexthop_add:
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return err; return err;
@ -5717,7 +5726,7 @@ static void mlxsw_sp_router_fib6_event_work(struct work_struct *work)
struct mlxsw_sp_fib_event_work *fib_work = struct mlxsw_sp_fib_event_work *fib_work =
container_of(work, struct mlxsw_sp_fib_event_work, work); container_of(work, struct mlxsw_sp_fib_event_work, work);
struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp;
bool replace; bool replace, append;
int err; int err;
rtnl_lock(); rtnl_lock();
@ -5728,8 +5737,10 @@ static void mlxsw_sp_router_fib6_event_work(struct work_struct *work)
case FIB_EVENT_ENTRY_APPEND: /* fall through */ case FIB_EVENT_ENTRY_APPEND: /* fall through */
case FIB_EVENT_ENTRY_ADD: case FIB_EVENT_ENTRY_ADD:
replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE;
append = fib_work->event == FIB_EVENT_ENTRY_APPEND;
err = mlxsw_sp_router_fib6_add(mlxsw_sp, err = mlxsw_sp_router_fib6_add(mlxsw_sp,
fib_work->fen6_info.rt, replace); fib_work->fen6_info.rt, replace,
append);
if (err) if (err)
mlxsw_sp_router_fib_abort(mlxsw_sp); mlxsw_sp_router_fib_abort(mlxsw_sp);
mlxsw_sp_rt6_release(fib_work->fen6_info.rt); mlxsw_sp_rt6_release(fib_work->fen6_info.rt);