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Message-ID: <489A9529.5010909@pobox.com>
Date: Thu, 07 Aug 2008 02:24:41 -0400
From: Jeff Garzik <jgarzik@...ox.com>
To: Wang Chen <wangchen@...fujitsu.com>
CC: NETDEV <netdev@...r.kernel.org>
Subject: Re: RESEND [PATCH 1/2] net-driver: Drivers don't set IFF_* flag
Wang Chen wrote:
> Some hardware set promisc when they are requested to set IFF_ALLMULTI flag.
> It's ok, but if drivers set IFF_PROMISC flag when they set promisc,
> it will broken upper layer handle for promisc and allmulti.
> In addition, drivers can use their own hardware programming to make it.
> So do not allow drivers to set IFF_* flags.
>
> This is a general driver fix, so I didn't split it to pieces and send
> to specific driver maintainers.
>
> Signed-off-by: Wang Chen <wangchen@...fujitsu.com>
> ---
> diff --git a/drivers/net/3c523.c b/drivers/net/3c523.c
> index dc6e474..e2ce41d 100644
> --- a/drivers/net/3c523.c
> +++ b/drivers/net/3c523.c
> @@ -640,10 +640,8 @@ static int init586(struct net_device *dev)
> cfg_cmd->time_low = 0x00;
> cfg_cmd->time_high = 0xf2;
> cfg_cmd->promisc = 0;
> - if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
> + if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC))
> cfg_cmd->promisc = 1;
> - dev->flags |= IFF_PROMISC;
> - }
> cfg_cmd->carr_coll = 0x00;
>
> p->scb->cbl_offset = make16(cfg_cmd);
> diff --git a/drivers/net/3c527.c b/drivers/net/3c527.c
> index 6aca0c6..abc84f7 100644
> --- a/drivers/net/3c527.c
> +++ b/drivers/net/3c527.c
> @@ -1521,14 +1521,11 @@ static void do_mc32_set_multicast_list(struct net_device *dev, int retry)
> struct mc32_local *lp = netdev_priv(dev);
> u16 filt = (1<<2); /* Save Bad Packets, for stats purposes */
>
> - if (dev->flags&IFF_PROMISC)
> + if ((dev->flags&IFF_PROMISC) ||
> + (dev->flags&IFF_ALLMULTI) ||
> + dev->mc_count > 10)
> /* Enable promiscuous mode */
> filt |= 1;
> - else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > 10)
> - {
> - dev->flags|=IFF_PROMISC;
> - filt |= 1;
> - }
> else if(dev->mc_count)
> {
> unsigned char block[62];
> diff --git a/drivers/net/atp.c b/drivers/net/atp.c
> index 3d44333..c10cd80 100644
> --- a/drivers/net/atp.c
> +++ b/drivers/net/atp.c
> @@ -854,14 +854,9 @@ static void set_rx_mode_8002(struct net_device *dev)
> struct net_local *lp = netdev_priv(dev);
> long ioaddr = dev->base_addr;
>
> - if ( dev->mc_count > 0 || (dev->flags & (IFF_ALLMULTI|IFF_PROMISC))) {
> - /* We must make the kernel realise we had to move
> - * into promisc mode or we start all out war on
> - * the cable. - AC
> - */
> - dev->flags|=IFF_PROMISC;
> + if (dev->mc_count > 0 || (dev->flags & (IFF_ALLMULTI|IFF_PROMISC)))
> lp->addr_mode = CMR2h_PROMISC;
> - } else
> + else
> lp->addr_mode = CMR2h_Normal;
> write_reg_high(ioaddr, CMR2, lp->addr_mode);
> }
> diff --git a/drivers/net/de620.c b/drivers/net/de620.c
> index 3f5190c..d454e14 100644
> --- a/drivers/net/de620.c
> +++ b/drivers/net/de620.c
> @@ -488,13 +488,6 @@ static void de620_set_multicast_list(struct net_device *dev)
> {
> if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
> { /* Enable promiscuous mode */
> - /*
> - * We must make the kernel realise we had to move
> - * into promisc mode or we start all out war on
> - * the cable. - AC
> - */
> - dev->flags|=IFF_PROMISC;
> -
> de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
> }
> else
> diff --git a/drivers/net/eepro.c b/drivers/net/eepro.c
> index 56f5049..1f11350 100644
> --- a/drivers/net/eepro.c
> +++ b/drivers/net/eepro.c
> @@ -1283,14 +1283,6 @@ set_multicast_list(struct net_device *dev)
>
> if (dev->flags&(IFF_ALLMULTI|IFF_PROMISC) || dev->mc_count > 63)
> {
> - /*
> - * We must make the kernel realise we had to move
> - * into promisc mode or we start all out war on
> - * the cable. If it was a promisc request the
> - * flag is already set. If not we assert it.
> - */
> - dev->flags|=IFF_PROMISC;
> -
> eepro_sw2bank2(ioaddr); /* be CAREFUL, BANK 2 now */
> mode = inb(ioaddr + REG2);
> outb(mode | PRMSC_Mode, ioaddr + REG2);
> diff --git a/drivers/net/eth16i.c b/drivers/net/eth16i.c
> index e3dd8b1..bee8b3f 100644
> --- a/drivers/net/eth16i.c
> +++ b/drivers/net/eth16i.c
> @@ -1356,7 +1356,6 @@ static void eth16i_multicast(struct net_device *dev)
>
> if(dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
> {
> - dev->flags|=IFF_PROMISC; /* Must do this */
> outb(3, ioaddr + RECEIVE_MODE_REG);
> } else {
> outb(2, ioaddr + RECEIVE_MODE_REG);
> diff --git a/drivers/net/lp486e.c b/drivers/net/lp486e.c
> index 591a7e4..83fa9d8 100644
> --- a/drivers/net/lp486e.c
> +++ b/drivers/net/lp486e.c
> @@ -1272,8 +1272,6 @@ static void set_multicast_list(struct net_device *dev) {
> return;
> }
> if (dev->mc_count == 0 && !(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
> - if (dev->flags & IFF_ALLMULTI)
> - dev->flags |= IFF_PROMISC;
> lp->i596_config[8] &= ~0x01;
> } else {
> lp->i596_config[8] |= 0x01;
> diff --git a/drivers/net/ni5010.c b/drivers/net/ni5010.c
> index a20005c..8e0ca9f 100644
> --- a/drivers/net/ni5010.c
> +++ b/drivers/net/ni5010.c
> @@ -648,7 +648,6 @@ static void ni5010_set_multicast_list(struct net_device *dev)
> PRINTK2((KERN_DEBUG "%s: entering set_multicast_list\n", dev->name));
>
> if (dev->flags&IFF_PROMISC || dev->flags&IFF_ALLMULTI || dev->mc_list) {
> - dev->flags |= IFF_PROMISC;
> outb(RMD_PROMISC, EDLC_RMODE); /* Enable promiscuous mode */
> PRINTK((KERN_DEBUG "%s: Entering promiscuous mode\n", dev->name));
> } else {
> diff --git a/drivers/net/ni52.c b/drivers/net/ni52.c
> index a316dcc..b9a882d 100644
> --- a/drivers/net/ni52.c
> +++ b/drivers/net/ni52.c
> @@ -621,7 +621,7 @@ static int init586(struct net_device *dev)
> if (num_addrs > len) {
> printk(KERN_ERR "%s: switching to promisc. mode\n",
> dev->name);
> - dev->flags |= IFF_PROMISC;
> + writeb(0x01, &cfg_cmd->promisc);
> }
> }
> if (dev->flags & IFF_PROMISC)
> diff --git a/drivers/net/sun3_82586.c b/drivers/net/sun3_82586.c
> index 9b2a7f7..e531302 100644
> --- a/drivers/net/sun3_82586.c
> +++ b/drivers/net/sun3_82586.c
> @@ -425,14 +425,11 @@ static int init586(struct net_device *dev)
> int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
> if(num_addrs > len) {
> printk("%s: switching to promisc. mode\n",dev->name);
> - dev->flags|=IFF_PROMISC;
> + cfg_cmd->promisc = 1;
> }
> }
> if(dev->flags&IFF_PROMISC)
> - {
> - cfg_cmd->promisc=1;
> - dev->flags|=IFF_PROMISC;
> - }
> + cfg_cmd->promisc = 1;
> cfg_cmd->carr_coll = 0x00;
>
> p->scb->cbl_offset = make16(cfg_cmd);
> diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
> index b047306..1ebcafe 100644
> --- a/drivers/net/wireless/orinoco.c
> +++ b/drivers/net/wireless/orinoco.c
> @@ -1998,13 +1998,6 @@ __orinoco_set_multicast_list(struct net_device *dev)
> else
> priv->mc_count = mc_count;
> }
> -
> - /* Since we can set the promiscuous flag when it wasn't asked
> - for, make sure the net_device knows about it. */
> - if (priv->promiscuous)
> - dev->flags |= IFF_PROMISC;
> - else
> - dev->flags &= ~IFF_PROMISC;
> }
>
> /* This must be called from user context, without locks held - use
> diff --git a/drivers/net/wireless/wavelan.c b/drivers/net/wireless/wavelan.c
> index 49ae970..136220b 100644
> --- a/drivers/net/wireless/wavelan.c
> +++ b/drivers/net/wireless/wavelan.c
> @@ -1409,9 +1409,6 @@ static void wavelan_set_multicast_list(struct net_device * dev)
> lp->mc_count = 0;
>
> wv_82586_reconfig(dev);
> -
> - /* Tell the kernel that we are doing a really bad job. */
> - dev->flags |= IFF_PROMISC;
> }
> } else
> /* Are there multicast addresses to send? */
> diff --git a/drivers/net/wireless/wavelan_cs.c b/drivers/net/wireless/wavelan_cs.c
> index b584c0e..00a3559 100644
> --- a/drivers/net/wireless/wavelan_cs.c
> +++ b/drivers/net/wireless/wavelan_cs.c
> @@ -1412,9 +1412,6 @@ wavelan_set_multicast_list(struct net_device * dev)
> lp->mc_count = 0;
>
> wv_82593_reconfig(dev);
> -
> - /* Tell the kernel that we are doing a really bad job... */
> - dev->flags |= IFF_PROMISC;
> }
> }
> else
> @@ -1433,9 +1430,6 @@ wavelan_set_multicast_list(struct net_device * dev)
> lp->mc_count = 0;
>
> wv_82593_reconfig(dev);
> -
> - /* Tell the kernel that we are doing a really bad job... */
> - dev->flags |= IFF_ALLMULTI;
applied
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