Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f7ed925c authored by WANG Cong's avatar WANG Cong Committed by David S. Miller
Browse files

ipv6: update the comment in mcast.c 



Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 414b6c94

net/ipv6/mcast.c

+5 −7
Original line number Original line Diff line number Diff line
@@ -556,9 +556,8 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, 
	}

	}





	err = -EADDRNOTAVAIL;

	err = -EADDRNOTAVAIL;

	/*

	/* changes to the ipv6_mc_list require the socket lock and

	 * changes to the ipv6_mc_list require the socket lock and

	 * rtnl lock. We have the socket lock and rcu read lock,

	 * a read lock on ip6_sk_mc_lock. We have the socket lock,

	 * so reading the list is safe.

	 * so reading the list is safe.

	 */

	 */
@@ -582,9 +581,8 @@ int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, 
	    copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {

	    copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {

		return -EFAULT;

		return -EFAULT;

	}

	}

	/* changes to psl require the socket lock, a read lock on

	/* changes to psl require the socket lock, and a write lock

	 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We

	 * on pmc->sflock. We have the socket lock so reading here is safe.

	 * have the socket lock, so reading here is safe.

	 */

	 */

	for (i = 0; i < copycount; i++) {

	for (i = 0; i < copycount; i++) {

		struct sockaddr_in6 *psin6;

		struct sockaddr_in6 *psin6;
@@ -2350,7 +2348,7 @@ static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, 
{

{

	int err;

	int err;





	/* callers have the socket lock and a write lock on ipv6_sk_mc_lock,

	/* callers have the socket lock and rtnl lock

	 * so no other readers or writers of iml or its sflist

	 * so no other readers or writers of iml or its sflist

	 */

	 */

	if (!iml->sflist) {

	if (!iml->sflist) {