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Date: Tue, 27 Feb 2018 14:53:46 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, petrm@...lanox.com, idosch@...lanox.com,
mlxsw@...lanox.com, xeb@...l.ru, dsa@...ulusnetworks.com
Subject: [patch net-next 12/15] mlxsw: Handle config changes pertinent to SPAN
From: Petr Machata <petrm@...lanox.com>
For some netdevices, for which mlxsw offloads mirroring, may have a
complex relationship between the declared intent and low-level
device configuration.
Trying to accurately track which changes might influence offloading
decisions is finicky and error-prone. Instead, this patch introduces a
function mlxsw_sp_span_entry_respin, which re-queries the configuration
anew and, if different, removes the existing offloads and installs new
ones.
Call this function strategically at event handlers that might influence
the mirroring configuration.
Signed-off-by: Petr Machata <petrm@...lanox.com>
Reviewed-by: Ido Schimmel <idosch@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 29 +++++++++++++---------
.../net/ethernet/mellanox/mlxsw/spectrum_router.c | 7 ++++++
.../net/ethernet/mellanox/mlxsw/spectrum_span.c | 24 ++++++++++++++++++
.../net/ethernet/mellanox/mlxsw/spectrum_span.h | 1 +
4 files changed, 49 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index b070cad8dba7..8d2d140d7910 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1,6 +1,6 @@
/*
* drivers/net/ethernet/mellanox/mlxsw/spectrum.c
- * Copyright (c) 2015-2017 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved.
* Copyright (c) 2015-2017 Jiri Pirko <jiri@...lanox.com>
* Copyright (c) 2015 Ido Schimmel <idosch@...lanox.com>
* Copyright (c) 2015 Elad Raz <eladr@...lanox.com>
@@ -3667,14 +3667,24 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
goto err_afa_init;
}
+ err = mlxsw_sp_span_init(mlxsw_sp);
+ if (err) {
+ dev_err(mlxsw_sp->bus_info->dev, "Failed to init span system\n");
+ goto err_span_init;
+ }
+
+ /* Initialize router after SPAN is initialized, so that the FIB and
+ * neighbor event handlers can issue SPAN respin.
+ */
err = mlxsw_sp_router_init(mlxsw_sp);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize router\n");
goto err_router_init;
}
- /* Initialize netdevice notifier after router is initialized, so that
- * the event handler can use router structures.
+ /* Initialize netdevice notifier after router and SPAN is initialized,
+ * so that the event handler can use router structures and call SPAN
+ * respin.
*/
mlxsw_sp->netdevice_nb.notifier_call = mlxsw_sp_netdevice_event;
err = register_netdevice_notifier(&mlxsw_sp->netdevice_nb);
@@ -3683,12 +3693,6 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
goto err_netdev_notifier;
}
- err = mlxsw_sp_span_init(mlxsw_sp);
- if (err) {
- dev_err(mlxsw_sp->bus_info->dev, "Failed to init span system\n");
- goto err_span_init;
- }
-
err = mlxsw_sp_acl_init(mlxsw_sp);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize ACL\n");
@@ -3714,12 +3718,12 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
err_dpipe_init:
mlxsw_sp_acl_fini(mlxsw_sp);
err_acl_init:
- mlxsw_sp_span_fini(mlxsw_sp);
-err_span_init:
unregister_netdevice_notifier(&mlxsw_sp->netdevice_nb);
err_netdev_notifier:
mlxsw_sp_router_fini(mlxsw_sp);
err_router_init:
+ mlxsw_sp_span_fini(mlxsw_sp);
+err_span_init:
mlxsw_sp_afa_fini(mlxsw_sp);
err_afa_init:
mlxsw_sp_counter_pool_fini(mlxsw_sp);
@@ -3745,9 +3749,9 @@ static void mlxsw_sp_fini(struct mlxsw_core *mlxsw_core)
mlxsw_sp_ports_remove(mlxsw_sp);
mlxsw_sp_dpipe_fini(mlxsw_sp);
mlxsw_sp_acl_fini(mlxsw_sp);
- mlxsw_sp_span_fini(mlxsw_sp);
unregister_netdevice_notifier(&mlxsw_sp->netdevice_nb);
mlxsw_sp_router_fini(mlxsw_sp);
+ mlxsw_sp_span_fini(mlxsw_sp);
mlxsw_sp_afa_fini(mlxsw_sp);
mlxsw_sp_counter_pool_fini(mlxsw_sp);
mlxsw_sp_switchdev_fini(mlxsw_sp);
@@ -4641,6 +4645,7 @@ static int mlxsw_sp_netdevice_event(struct notifier_block *nb,
if (span_entry)
mlxsw_sp_span_entry_invalidate(mlxsw_sp, span_entry);
}
+ mlxsw_sp_span_respin(mlxsw_sp);
if (mlxsw_sp_netdev_is_ipip_ol(mlxsw_sp, dev))
err = mlxsw_sp_netdevice_ipip_ol_event(mlxsw_sp, dev,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 05146970c19c..69f16c605b9d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -70,6 +70,7 @@
#include "spectrum_mr.h"
#include "spectrum_mr_tcam.h"
#include "spectrum_router.h"
+#include "spectrum_span.h"
struct mlxsw_sp_fib;
struct mlxsw_sp_vr;
@@ -2330,6 +2331,8 @@ static void mlxsw_sp_router_neigh_event_work(struct work_struct *work)
read_unlock_bh(&n->lock);
rtnl_lock();
+ mlxsw_sp_span_respin(mlxsw_sp);
+
entry_connected = nud_state & NUD_VALID && !dead;
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!entry_connected && !neigh_entry)
@@ -5589,6 +5592,8 @@ static void mlxsw_sp_router_fib4_event_work(struct work_struct *work)
/* Protect internal structures from changes */
rtnl_lock();
+ mlxsw_sp_span_respin(mlxsw_sp);
+
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE: /* fall through */
case FIB_EVENT_ENTRY_APPEND: /* fall through */
@@ -5631,6 +5636,8 @@ static void mlxsw_sp_router_fib6_event_work(struct work_struct *work)
int err;
rtnl_lock();
+ mlxsw_sp_span_respin(mlxsw_sp);
+
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE: /* fall through */
case FIB_EVENT_ENTRY_ADD:
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index c0e0e9af2da7..71102f156a97 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -502,3 +502,27 @@ void mlxsw_sp_span_mirror_del(struct mlxsw_sp_port *from, int span_id,
span_entry->id);
mlxsw_sp_span_inspected_port_del(from, span_entry, type, bind);
}
+
+void mlxsw_sp_span_respin(struct mlxsw_sp *mlxsw_sp)
+{
+ int i;
+ int err;
+
+ ASSERT_RTNL();
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
+ struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span.entries[i];
+ struct mlxsw_sp_span_parms sparms = {0};
+
+ if (!curr->ref_count)
+ continue;
+
+ err = curr->ops->parms(curr->to_dev, &sparms);
+ if (err)
+ continue;
+
+ if (memcmp(&sparms, &curr->parms, sizeof(sparms))) {
+ mlxsw_sp_span_entry_deconfigure(curr);
+ mlxsw_sp_span_entry_configure(mlxsw_sp, curr, sparms);
+ }
+ }
+}
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index 9390b05a7919..b6dcd7d7277c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -76,6 +76,7 @@ struct mlxsw_sp_span_entry_ops {
int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp);
void mlxsw_sp_span_fini(struct mlxsw_sp *mlxsw_sp);
+void mlxsw_sp_span_respin(struct mlxsw_sp *mlxsw_sp);
int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
const struct net_device *to_dev,
--
2.14.3
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