| Vivien Didelot | a40c175 | 2017-05-19 17:00:44 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Handling of a single switch port |
| 3 | * |
| 4 | * Copyright (c) 2017 Savoir-faire Linux Inc. |
| 5 | * Vivien Didelot <vivien.didelot@savoirfairelinux.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/if_bridge.h> |
| 14 | |
| 15 | #include "dsa_priv.h" |
| 16 | |
| 17 | int dsa_port_set_state(struct dsa_port *dp, u8 state, |
| 18 | struct switchdev_trans *trans) |
| 19 | { |
| 20 | struct dsa_switch *ds = dp->ds; |
| 21 | int port = dp->index; |
| 22 | |
| 23 | if (switchdev_trans_ph_prepare(trans)) |
| 24 | return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP; |
| 25 | |
| 26 | if (ds->ops->port_stp_state_set) |
| 27 | ds->ops->port_stp_state_set(ds, port, state); |
| 28 | |
| 29 | if (ds->ops->port_fast_age) { |
| 30 | /* Fast age FDB entries or flush appropriate forwarding database |
| 31 | * for the given port, if we are moving it from Learning or |
| 32 | * Forwarding state, to Disabled or Blocking or Listening state. |
| 33 | */ |
| 34 | |
| 35 | if ((dp->stp_state == BR_STATE_LEARNING || |
| 36 | dp->stp_state == BR_STATE_FORWARDING) && |
| 37 | (state == BR_STATE_DISABLED || |
| 38 | state == BR_STATE_BLOCKING || |
| 39 | state == BR_STATE_LISTENING)) |
| 40 | ds->ops->port_fast_age(ds, port); |
| 41 | } |
| 42 | |
| 43 | dp->stp_state = state; |
| 44 | |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | void dsa_port_set_state_now(struct dsa_port *dp, u8 state) |
| 49 | { |
| 50 | int err; |
| 51 | |
| 52 | err = dsa_port_set_state(dp, state, NULL); |
| 53 | if (err) |
| 54 | pr_err("DSA: failed to set STP state %u (%d)\n", state, err); |
| 55 | } |