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Commit 3fba5a8b authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
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[NET]: dev_mcast: switch to generic net_device address lists 



Use generic net_device address lists for multicast list handling.
Some defines are used to keep drivers working.

Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bf742482

include/linux/netdevice.h

+7 −10
Original line number Diff line number Diff line
@@ -190,14 +190,11 @@ struct dev_addr_list 
 *	We tag multicasts with these structures.

 */



struct dev_mc_list

{	

	struct dev_mc_list	*next;

	__u8			dmi_addr[MAX_ADDR_LEN];

	unsigned char		dmi_addrlen;

	int			dmi_users;

	int			dmi_gusers;

};

#define dev_mc_list	dev_addr_list

#define dmi_addr	da_addr

#define dmi_addrlen	da_addrlen

#define dmi_users	da_users

#define dmi_gusers	da_gusers



struct hh_cache

{
@@ -400,7 +397,7 @@ struct net_device 
	unsigned char		addr_len;	/* hardware address length	*/

	unsigned short          dev_id;		/* for shared network cards */



	struct dev_mc_list	*mc_list;	/* Multicast mac addresses	*/

	struct dev_addr_list	*mc_list;	/* Multicast mac addresses	*/

	int			mc_count;	/* Number of installed mcasts	*/

	int			promiscuity;

	int			allmulti;

net/core/dev_mcast.c

+15 −81
Original line number Diff line number Diff line
@@ -102,47 +102,20 @@ void dev_mc_upload(struct net_device *dev) 


int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl)

{

	int err = 0;

	struct dev_mc_list *dmi, **dmip;

	int err;



	netif_tx_lock_bh(dev);



	for (dmip = &dev->mc_list; (dmi = *dmip) != NULL; dmip = &dmi->next) {

		/*

		 *	Find the entry we want to delete. The device could

		 *	have variable length entries so check these too.

		 */

		if (memcmp(dmi->dmi_addr, addr, dmi->dmi_addrlen) == 0 &&

		    alen == dmi->dmi_addrlen) {

			if (glbl) {

				int old_glbl = dmi->dmi_gusers;

				dmi->dmi_gusers = 0;

				if (old_glbl == 0)

					break;

			}

			if (--dmi->dmi_users)

				goto done;



			/*

			 *	Last user. So delete the entry.

			 */

			*dmip = dmi->next;

	err = __dev_addr_delete(&dev->mc_list, addr, alen, glbl);

	if (!err) {

		dev->mc_count--;



			kfree(dmi);



		/*

		 *	We have altered the list, so the card

		 *	loaded filter is now wrong. Fix it

		 */

			__dev_mc_upload(dev);



			netif_tx_unlock_bh(dev);

			return 0;

		}

		__dev_mc_upload(dev);

	}

	err = -ENOENT;

done:

	netif_tx_unlock_bh(dev);

	return err;

}
@@ -153,46 +126,15 @@ int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl) 


int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl)

{

	int err = 0;

	struct dev_mc_list *dmi, *dmi1;



	dmi1 = kmalloc(sizeof(*dmi), GFP_ATOMIC);

	int err;



	netif_tx_lock_bh(dev);

	for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) {

		if (memcmp(dmi->dmi_addr, addr, dmi->dmi_addrlen) == 0 &&

		    dmi->dmi_addrlen == alen) {

			if (glbl) {

				int old_glbl = dmi->dmi_gusers;

				dmi->dmi_gusers = 1;

				if (old_glbl)

					goto done;

			}

			dmi->dmi_users++;

			goto done;

		}

	}



	if ((dmi = dmi1) == NULL) {

		netif_tx_unlock_bh(dev);

		return -ENOMEM;

	}

	memcpy(dmi->dmi_addr, addr, alen);

	dmi->dmi_addrlen = alen;

	dmi->next = dev->mc_list;

	dmi->dmi_users = 1;

	dmi->dmi_gusers = glbl ? 1 : 0;

	dev->mc_list = dmi;

	err = __dev_addr_add(&dev->mc_list, addr, alen, glbl);

	if (!err) {

		dev->mc_count++;



		__dev_mc_upload(dev);



	netif_tx_unlock_bh(dev);

	return 0;



done:

	}

	netif_tx_unlock_bh(dev);

	kfree(dmi1);

	return err;

}
@@ -203,16 +145,8 @@ int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl) 
void dev_mc_discard(struct net_device *dev)

{

	netif_tx_lock_bh(dev);



	while (dev->mc_list != NULL) {

		struct dev_mc_list *tmp = dev->mc_list;

		dev->mc_list = tmp->next;

		if (tmp->dmi_users > tmp->dmi_gusers)

			printk("dev_mc_discard: multicast leakage! dmi_users=%d\n", tmp->dmi_users);

		kfree(tmp);

	}

	__dev_addr_discard(&dev->mc_list);

	dev->mc_count = 0;



	netif_tx_unlock_bh(dev);

}
@@ -244,7 +178,7 @@ static void dev_mc_seq_stop(struct seq_file *seq, void *v) 


static int dev_mc_seq_show(struct seq_file *seq, void *v)

{

	struct dev_mc_list *m;

	struct dev_addr_list *m;

	struct net_device *dev = v;



	netif_tx_lock_bh(dev);