4f2c6ae5c6
When switchdev drivers process FDB notifications from the underlying
device they resolve the netdev to which the entry points to and notify
the bridge using the switchdev notifier.
However, since the RTNL mutex is not held there is nothing preventing
the netdev from disappearing in the middle, which will cause
br_switchdev_event() to dereference a non-existing netdev.
Make switchdev drivers hold the lock at the beginning of the
notification processing session and release it once it ends, after
notifying the bridge.
Also, remove switchdev_mutex and fdb_lock, as they are no longer needed
when RTNL mutex is held.
Fixes: 03bf0c2812 ("switchdev: introduce switchdev notifier")
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>
258 lines
7.4 KiB
C
258 lines
7.4 KiB
C
/*
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* drivers/net/ethernet/mellanox/mlxsw/spectrum.h
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* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
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* Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
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* Copyright (c) 2015 Elad Raz <eladr@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MLXSW_SPECTRUM_H
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#define _MLXSW_SPECTRUM_H
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#include <linux/types.h>
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#include <linux/netdevice.h>
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#include <linux/bitops.h>
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#include <linux/if_vlan.h>
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#include <linux/list.h>
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#include <net/switchdev.h>
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#include "port.h"
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#include "core.h"
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#define MLXSW_SP_VFID_BASE VLAN_N_VID
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#define MLXSW_SP_VFID_PORT_MAX 512 /* Non-bridged VLAN interfaces */
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#define MLXSW_SP_VFID_BR_MAX 8192 /* Bridged VLAN interfaces */
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#define MLXSW_SP_VFID_MAX (MLXSW_SP_VFID_PORT_MAX + MLXSW_SP_VFID_BR_MAX)
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#define MLXSW_SP_LAG_MAX 64
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#define MLXSW_SP_PORT_PER_LAG_MAX 16
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#define MLXSW_SP_MID_MAX 7000
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struct mlxsw_sp_port;
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struct mlxsw_sp_upper {
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struct net_device *dev;
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unsigned int ref_count;
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};
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struct mlxsw_sp_vfid {
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struct list_head list;
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u16 nr_vports;
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u16 vfid; /* Starting at 0 */
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struct net_device *br_dev;
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u16 vid;
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};
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struct mlxsw_sp_mid {
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struct list_head list;
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unsigned char addr[ETH_ALEN];
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u16 vid;
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u16 mid;
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unsigned int ref_count;
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};
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static inline u16 mlxsw_sp_vfid_to_fid(u16 vfid)
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{
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return MLXSW_SP_VFID_BASE + vfid;
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}
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static inline u16 mlxsw_sp_fid_to_vfid(u16 fid)
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{
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return fid - MLXSW_SP_VFID_BASE;
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}
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static inline bool mlxsw_sp_fid_is_vfid(u16 fid)
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{
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return fid >= MLXSW_SP_VFID_BASE;
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}
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struct mlxsw_sp {
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struct {
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struct list_head list;
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unsigned long mapped[BITS_TO_LONGS(MLXSW_SP_VFID_PORT_MAX)];
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} port_vfids;
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struct {
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struct list_head list;
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unsigned long mapped[BITS_TO_LONGS(MLXSW_SP_VFID_BR_MAX)];
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} br_vfids;
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struct {
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struct list_head list;
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unsigned long mapped[BITS_TO_LONGS(MLXSW_SP_MID_MAX)];
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} br_mids;
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unsigned long active_fids[BITS_TO_LONGS(VLAN_N_VID)];
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struct mlxsw_sp_port **ports;
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struct mlxsw_core *core;
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const struct mlxsw_bus_info *bus_info;
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unsigned char base_mac[ETH_ALEN];
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struct {
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struct delayed_work dw;
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#define MLXSW_SP_DEFAULT_LEARNING_INTERVAL 100
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unsigned int interval; /* ms */
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} fdb_notify;
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#define MLXSW_SP_DEFAULT_AGEING_TIME 300
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u32 ageing_time;
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struct mlxsw_sp_upper master_bridge;
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struct mlxsw_sp_upper lags[MLXSW_SP_LAG_MAX];
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};
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static inline struct mlxsw_sp_upper *
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mlxsw_sp_lag_get(struct mlxsw_sp *mlxsw_sp, u16 lag_id)
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{
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return &mlxsw_sp->lags[lag_id];
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}
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struct mlxsw_sp_port_pcpu_stats {
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u64 rx_packets;
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u64 rx_bytes;
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u64 tx_packets;
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u64 tx_bytes;
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struct u64_stats_sync syncp;
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u32 tx_dropped;
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};
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struct mlxsw_sp_port {
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struct net_device *dev;
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struct mlxsw_sp_port_pcpu_stats __percpu *pcpu_stats;
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struct mlxsw_sp *mlxsw_sp;
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u8 local_port;
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u8 stp_state;
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u8 learning:1,
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learning_sync:1,
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uc_flood:1,
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bridged:1,
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lagged:1;
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u16 pvid;
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u16 lag_id;
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struct {
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struct list_head list;
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struct mlxsw_sp_vfid *vfid;
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u16 vid;
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} vport;
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/* 802.1Q bridge VLANs */
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unsigned long *active_vlans;
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unsigned long *untagged_vlans;
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/* VLAN interfaces */
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struct list_head vports_list;
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};
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static inline struct mlxsw_sp_port *
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mlxsw_sp_port_lagged_get(struct mlxsw_sp *mlxsw_sp, u16 lag_id, u8 port_index)
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{
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struct mlxsw_sp_port *mlxsw_sp_port;
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u8 local_port;
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local_port = mlxsw_core_lag_mapping_get(mlxsw_sp->core,
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lag_id, port_index);
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mlxsw_sp_port = mlxsw_sp->ports[local_port];
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return mlxsw_sp_port && mlxsw_sp_port->lagged ? mlxsw_sp_port : NULL;
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}
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static inline bool
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mlxsw_sp_port_is_vport(const struct mlxsw_sp_port *mlxsw_sp_port)
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{
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return mlxsw_sp_port->vport.vfid;
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}
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static inline struct net_device *
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mlxsw_sp_vport_br_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
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{
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return mlxsw_sp_vport->vport.vfid->br_dev;
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}
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static inline u16
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mlxsw_sp_vport_vid_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
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{
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return mlxsw_sp_vport->vport.vid;
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}
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static inline u16
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mlxsw_sp_vport_vfid_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
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{
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return mlxsw_sp_vport->vport.vfid->vfid;
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}
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static inline struct mlxsw_sp_port *
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mlxsw_sp_port_vport_find(const struct mlxsw_sp_port *mlxsw_sp_port, u16 vid)
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{
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struct mlxsw_sp_port *mlxsw_sp_vport;
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list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
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vport.list) {
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if (mlxsw_sp_vport_vid_get(mlxsw_sp_vport) == vid)
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return mlxsw_sp_vport;
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}
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return NULL;
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}
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static inline struct mlxsw_sp_port *
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mlxsw_sp_port_vport_find_by_vfid(const struct mlxsw_sp_port *mlxsw_sp_port,
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u16 vfid)
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{
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struct mlxsw_sp_port *mlxsw_sp_vport;
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list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
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vport.list) {
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if (mlxsw_sp_vport_vfid_get(mlxsw_sp_vport) == vfid)
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return mlxsw_sp_vport;
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}
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return NULL;
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}
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enum mlxsw_sp_flood_table {
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MLXSW_SP_FLOOD_TABLE_UC,
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MLXSW_SP_FLOOD_TABLE_BM,
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};
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int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp);
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int mlxsw_sp_port_buffers_init(struct mlxsw_sp_port *mlxsw_sp_port);
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int mlxsw_sp_switchdev_init(struct mlxsw_sp *mlxsw_sp);
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void mlxsw_sp_switchdev_fini(struct mlxsw_sp *mlxsw_sp);
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int mlxsw_sp_port_vlan_init(struct mlxsw_sp_port *mlxsw_sp_port);
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void mlxsw_sp_port_switchdev_init(struct mlxsw_sp_port *mlxsw_sp_port);
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void mlxsw_sp_port_switchdev_fini(struct mlxsw_sp_port *mlxsw_sp_port);
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int mlxsw_sp_port_vid_to_fid_set(struct mlxsw_sp_port *mlxsw_sp_port,
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enum mlxsw_reg_svfa_mt mt, bool valid, u16 fid,
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u16 vid);
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int mlxsw_sp_port_vlan_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid_begin,
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u16 vid_end, bool is_member, bool untagged);
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int mlxsw_sp_port_add_vid(struct net_device *dev, __be16 __always_unused proto,
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u16 vid);
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int mlxsw_sp_port_kill_vid(struct net_device *dev,
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__be16 __always_unused proto, u16 vid);
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int mlxsw_sp_vport_flood_set(struct mlxsw_sp_port *mlxsw_sp_vport, u16 vfid,
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bool set, bool only_uc);
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void mlxsw_sp_port_active_vlans_del(struct mlxsw_sp_port *mlxsw_sp_port);
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#endif
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