diff options
Diffstat (limited to 'drivers/net/can/dev/netlink.c')
-rw-r--r-- | drivers/net/can/dev/netlink.c | 49 |
1 files changed, 42 insertions, 7 deletions
diff --git a/drivers/net/can/dev/netlink.c b/drivers/net/can/dev/netlink.c index 8efa22d9f214..036d85ef07f5 100644 --- a/drivers/net/can/dev/netlink.c +++ b/drivers/net/can/dev/netlink.c @@ -36,10 +36,24 @@ static const struct nla_policy can_tdc_policy[IFLA_CAN_TDC_MAX + 1] = { [IFLA_CAN_TDC_TDCF] = { .type = NLA_U32 }, }; +static int can_validate_bittiming(const struct can_bittiming *bt, + struct netlink_ext_ack *extack) +{ + /* sample point is in one-tenth of a percent */ + if (bt->sample_point >= 1000) { + NL_SET_ERR_MSG(extack, "sample point must be between 0 and 100%"); + + return -EINVAL; + } + + return 0; +} + static int can_validate(struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) { bool is_can_fd = false; + int err; /* Make sure that valid CAN FD configurations always consist of * - nominal/arbitration bittiming @@ -51,6 +65,15 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[], if (!data) return 0; + if (data[IFLA_CAN_BITTIMING]) { + struct can_bittiming bt; + + memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt)); + err = can_validate_bittiming(&bt, extack); + if (err) + return err; + } + if (data[IFLA_CAN_CTRLMODE]) { struct can_ctrlmode *cm = nla_data(data[IFLA_CAN_CTRLMODE]); u32 tdc_flags = cm->flags & CAN_CTRLMODE_TDC_MASK; @@ -71,7 +94,6 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[], */ if (data[IFLA_CAN_TDC]) { struct nlattr *tb_tdc[IFLA_CAN_TDC_MAX + 1]; - int err; err = nla_parse_nested(tb_tdc, IFLA_CAN_TDC_MAX, data[IFLA_CAN_TDC], @@ -102,6 +124,15 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[], return -EOPNOTSUPP; } + if (data[IFLA_CAN_DATA_BITTIMING]) { + struct can_bittiming bt; + + memcpy(&bt, nla_data(data[IFLA_CAN_DATA_BITTIMING]), sizeof(bt)); + err = can_validate_bittiming(&bt, extack); + if (err) + return err; + } + return 0; } @@ -184,13 +215,15 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[], err = can_get_bittiming(dev, &bt, priv->bittiming_const, priv->bitrate_const, - priv->bitrate_const_cnt); + priv->bitrate_const_cnt, + extack); if (err) return err; if (priv->bitrate_max && bt.bitrate > priv->bitrate_max) { - netdev_err(dev, "arbitration bitrate surpasses transceiver capabilities of %d bps\n", - priv->bitrate_max); + NL_SET_ERR_MSG_FMT(extack, + "arbitration bitrate %u bps surpasses transceiver capabilities of %u bps", + bt.bitrate, priv->bitrate_max); return -EINVAL; } @@ -288,13 +321,15 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[], err = can_get_bittiming(dev, &dbt, priv->data_bittiming_const, priv->data_bitrate_const, - priv->data_bitrate_const_cnt); + priv->data_bitrate_const_cnt, + extack); if (err) return err; if (priv->bitrate_max && dbt.bitrate > priv->bitrate_max) { - netdev_err(dev, "canfd data bitrate surpasses transceiver capabilities of %d bps\n", - priv->bitrate_max); + NL_SET_ERR_MSG_FMT(extack, + "CANFD data bitrate %u bps surpasses transceiver capabilities of %u bps", + dbt.bitrate, priv->bitrate_max); return -EINVAL; } |