Commit b8bae41e authored by Rami Rosen's avatar Rami Rosen Committed by David S. Miller
Browse files

ipv4: add mc_count to in_device. 



This patch add mc_count to struct in_device and updates
increment/decrement/initilaize of this field in IPv4 and in IPv6.

- Also printing the vfs /proc entry (/proc/net/igmp) is adjusted to
use the new mc_count.

Signed-off-by: default avatarRami Rosen <ramirose@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent be713a44

include/linux/inetdevice.h

+1 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ struct in_device 
	struct in_ifaddr	*ifa_list;	/* IP ifaddr chain		*/

	rwlock_t		mc_list_lock;

	struct ip_mc_list	*mc_list;	/* IP multicast filter chain    */

	int			mc_count;	          /* Number of installed mcasts	*/

	spinlock_t		mc_tomb_lock;

	struct ip_mc_list	*mc_tomb;

	unsigned long		mr_v1_seen;

net/ipv4/igmp.c

+5 −2
Original line number Diff line number Diff line
@@ -1234,6 +1234,7 @@ void ip_mc_inc_group(struct in_device *in_dev, __be32 addr) 
	write_lock_bh(&in_dev->mc_list_lock);

	im->next=in_dev->mc_list;

	in_dev->mc_list=im;

	in_dev->mc_count++;

	write_unlock_bh(&in_dev->mc_list_lock);

#ifdef CONFIG_IP_MULTICAST

	igmpv3_del_delrec(in_dev, im->multiaddr);
@@ -1282,6 +1283,7 @@ void ip_mc_dec_group(struct in_device *in_dev, __be32 addr) 
			if (--i->users == 0) {

				write_lock_bh(&in_dev->mc_list_lock);

				*ip = i->next;

				in_dev->mc_count--;

				write_unlock_bh(&in_dev->mc_list_lock);

				igmp_group_dropped(i);
@@ -1330,6 +1332,7 @@ void ip_mc_init_dev(struct in_device *in_dev) 
	setup_timer(&in_dev->mr_gq_timer, igmp_gq_timer_expire,

			(unsigned long)in_dev);

	in_dev->mr_ifc_count = 0;

	in_dev->mc_count     = 0;

	setup_timer(&in_dev->mr_ifc_timer, igmp_ifc_timer_expire,

			(unsigned long)in_dev);

	in_dev->mr_qrv = IGMP_Unsolicited_Report_Count;
@@ -1369,8 +1372,8 @@ void ip_mc_destroy_dev(struct in_device *in_dev) 
	write_lock_bh(&in_dev->mc_list_lock);

	while ((i = in_dev->mc_list) != NULL) {

		in_dev->mc_list = i->next;

		in_dev->mc_count--;

		write_unlock_bh(&in_dev->mc_list_lock);



		igmp_group_dropped(i);

		ip_ma_put(i);
@@ -2383,7 +2386,7 @@ static int igmp_mc_seq_show(struct seq_file *seq, void *v) 


		if (state->in_dev->mc_list == im) {

			seq_printf(seq, "%d\t%-10s: %5d %7s\n",

				   state->dev->ifindex, state->dev->name, state->dev->mc_count, querier);

				   state->dev->ifindex, state->dev->name, state->in_dev->mc_count, querier);

		}



		seq_printf(seq,

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