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Message-ID: <54DDCBDE.2050002@windriver.com> Date: Fri, 13 Feb 2015 18:03:10 +0800 From: yzhu1 <Yanjun.Zhu@...driver.com> To: <netdev@...r.kernel.org>, <mst@...hat.com>, <jasowang@...hat.com>, <viro@...iv.linux.org.uk>, <davem@...emloft.net>, <sergei.shtylyov@...entembedded.com>, <jonathon.reinhart@...il.com>, <maxk@....qualcomm.com> Subject: Re: [PATCH 1/1] tun: change speed from 10M to dynamically configured add maxk@....qualcomm.com, the maintainer of tun/tap driver. Zhu Yanjun On 02/13/2015 02:19 PM, Zhu Yanjun wrote: > The default speed of normal nic is 1000M while the default speed > of tun is 10M. Now the default speed of tun is changed to 1000M. > And there are 3 options: 10M, 100M and 1000M to the speed of tun. > The command "ethtool -s tun0 speed 10/100/1000" can configure the > speed of tun dynamically. > > CC: Michael S. Tsirkin <mst@...hat.com> > CC: Jason Wang <jasowang@...hat.com> > CC: Al Viro <viro@...iv.linux.org.uk> > Reviewed-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com> > Reviewed-by: Jonathon Reinhart <jonathon.reinhart@...il.com> > Signed-off-by: Zhu Yanjun <Yanjun.Zhu@...driver.com> > --- > drivers/net/tun.c | 43 ++++++++++++++++++++++++++++++++++++++++++- > include/uapi/linux/if_tun.h | 5 +++++ > 2 files changed, 47 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/tun.c b/drivers/net/tun.c > index 8c8dc16..423b276 100644 > --- a/drivers/net/tun.c > +++ b/drivers/net/tun.c > @@ -950,6 +950,9 @@ static void tun_net_init(struct net_device *dev) > dev->addr_len = 0; > dev->mtu = 1500; > > + /* Set default speed 1000M */ > + tun->flags |= TUN_CTRL_SPD_1000; > + > /* Zero header length */ > dev->type = ARPHRD_NONE; > dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; > @@ -2257,9 +2260,18 @@ static struct miscdevice tun_miscdev = { > > static int tun_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) > { > + struct tun_struct *tun = netdev_priv(dev); > + > + /* Get the speed of tun */ > + if (tun->flags & TUN_CTRL_SPD_1000) { > + ethtool_cmd_speed_set(cmd, SPEED_1000); > + } else if (tun->flags & TUN_CTRL_SPD_100) { > + ethtool_cmd_speed_set(cmd, SPEED_100); > + } else > + ethtool_cmd_speed_set(cmd, SPEED_10); > + > cmd->supported = 0; > cmd->advertising = 0; > - ethtool_cmd_speed_set(cmd, SPEED_10); > cmd->duplex = DUPLEX_FULL; > cmd->port = PORT_TP; > cmd->phy_address = 0; > @@ -2287,6 +2299,34 @@ static void tun_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info > } > } > > +static int tun_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) > +{ > + struct tun_struct *tun = netdev_priv(dev); > + u32 speed = ethtool_cmd_speed(cmd); > + int ret = 0; > + > + /* Set speed flag */ > + switch (speed) { > + case 10: > + tun->flags &= ~(TUN_CTRL_SPD_100 | TUN_CTRL_SPD_1000); > + tun->flags |= TUN_CTRL_SPD_10; > + break; > + case 100: > + tun->flags &= ~(TUN_CTRL_SPD_10 | TUN_CTRL_SPD_1000); > + tun->flags |= TUN_CTRL_SPD_100; > + break; > + case 1000: > + tun->flags &= ~(TUN_CTRL_SPD_10 | TUN_CTRL_SPD_100); > + tun->flags |= TUN_CTRL_SPD_1000; > + break; > + default: > + ret = -EINVAL; > + tun_debug(KERN_INFO, tun, "wrong speed!\n"); > + } > + > + return ret; > +} > + > static u32 tun_get_msglevel(struct net_device *dev) > { > #ifdef TUN_DEBUG > @@ -2307,6 +2347,7 @@ static void tun_set_msglevel(struct net_device *dev, u32 value) > > static const struct ethtool_ops tun_ethtool_ops = { > .get_settings = tun_get_settings, > + .set_settings = tun_set_settings, > .get_drvinfo = tun_get_drvinfo, > .get_msglevel = tun_get_msglevel, > .set_msglevel = tun_set_msglevel, > diff --git a/include/uapi/linux/if_tun.h b/include/uapi/linux/if_tun.h > index 50ae243..78a09a7 100644 > --- a/include/uapi/linux/if_tun.h > +++ b/include/uapi/linux/if_tun.h > @@ -66,6 +66,11 @@ > #define IFF_PERSIST 0x0800 > #define IFF_NOFILTER 0x1000 > > +/*add speed control, default 1000M*/ > +#define TUN_CTRL_SPD_10 0x0020 > +#define TUN_CTRL_SPD_100 0x0040 > +#define TUN_CTRL_SPD_1000 0x0080 > + > /* Socket options */ > #define TUN_TX_TIMESTAMP 1 > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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