From 53b562df8c203e189fc69f7af0d8668e8dec5a8a Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Fri, 15 Jun 2018 16:23:36 +0300 Subject: [PATCH] mlxsw: spectrum_router: Allow appending to dev-only routes Commit f34436a43092 ("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: f34436a43092 ("net/ipv6: Simplify route replace and appending into multipath route") Signed-off-by: Ido Schimmel Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- .../ethernet/mellanox/mlxsw/spectrum_router.c | 27 +++++++++++++------ 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 77b2adb29341..c8956ab224ea 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -4771,11 +4771,11 @@ mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry) static struct mlxsw_sp_fib6_entry * 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; - if (!mlxsw_sp_fib6_rt_can_mp(nrt) || replace) + if (!append) return NULL; 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; if (rt->fib6_metric < nrt->fib6_metric) continue; - if (rt->fib6_metric == nrt->fib6_metric && - mlxsw_sp_fib6_rt_can_mp(rt)) + if (rt->fib6_metric == nrt->fib6_metric) return fib6_entry; if (rt->fib6_metric > nrt->fib6_metric) 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, - struct fib6_info *rt, bool replace) + struct fib6_info *rt, bool replace, + bool append) { struct mlxsw_sp_fib6_entry *fib6_entry; 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 * 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) { err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt); if (err) @@ -5350,6 +5350,14 @@ static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp, 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); if (IS_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: mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); err_fib6_entry_create: +err_fib6_entry_append: err_fib6_entry_nexthop_add: mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 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 = container_of(work, struct mlxsw_sp_fib_event_work, work); struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; - bool replace; + bool replace, append; int err; 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_ADD: replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; + append = fib_work->event == FIB_EVENT_ENTRY_APPEND; err = mlxsw_sp_router_fib6_add(mlxsw_sp, - fib_work->fen6_info.rt, replace); + fib_work->fen6_info.rt, replace, + append); if (err) mlxsw_sp_router_fib_abort(mlxsw_sp); mlxsw_sp_rt6_release(fib_work->fen6_info.rt); -- 2.45.2