Commit 46e5f401 authored by Florent Fourcot's avatar Florent Fourcot Committed by David S. Miller
Browse files

ipv6: add a flag to get the flow label used remotly 



This information is already available via IPV6_FLOWINFO
of IPV6_2292PKTOPTIONS, and them a filtering to get the flow label
information. But it is probably logical and easier for users to add this
here, and to control both sent/received flow label values with the
IPV6_FLOWLABEL_MGR option.

Signed-off-by: default avatarFlorent Fourcot <florent.fourcot@enst-bretagne.fr>
Acked-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent df3687ff

include/net/ipv6.h

+2 −1
Original line number Diff line number Diff line
@@ -253,7 +253,8 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space, 
					 struct ipv6_txoptions *fopt);

void fl6_free_socklist(struct sock *sk);

int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);

int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq);

int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,

			   int flags);

int ip6_flowlabel_init(void);

void ip6_flowlabel_cleanup(void);

include/uapi/linux/in6.h

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ struct in6_flowlabel_req { 
#define IPV6_FL_F_CREATE	1

#define IPV6_FL_F_EXCL		2

#define IPV6_FL_F_REFLECT	4

#define IPV6_FL_F_REMOTE	8



#define IPV6_FL_S_NONE		0

#define IPV6_FL_S_EXCL		1

net/ipv6/ip6_flowlabel.c

+7 −1
Original line number Diff line number Diff line
@@ -481,11 +481,17 @@ static inline void fl_link(struct ipv6_pinfo *np, struct ipv6_fl_socklist *sfl, 
	spin_unlock_bh(&ip6_sk_fl_lock);

}



int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq)

int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,

			   int flags)

{

	struct ipv6_pinfo *np = inet6_sk(sk);

	struct ipv6_fl_socklist *sfl;



	if (flags & IPV6_FL_F_REMOTE) {

		freq->flr_label = np->rcv_flowinfo & IPV6_FLOWLABEL_MASK;

		return 0;

	}



	if (np->repflow) {

		freq->flr_label = np->flow_label;

		return 0;

net/ipv6/ipv6_sockglue.c

+4 −1
Original line number Diff line number Diff line
@@ -1221,6 +1221,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 
	case IPV6_FLOWLABEL_MGR:

	{

		struct in6_flowlabel_req freq;

		int flags;



		if (len < sizeof(freq))

			return -EINVAL;
@@ -1232,9 +1233,11 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, 
			return -EINVAL;



		len = sizeof(freq);

		flags = freq.flr_flags;



		memset(&freq, 0, sizeof(freq));



		val = ipv6_flowlabel_opt_get(sk, &freq);

		val = ipv6_flowlabel_opt_get(sk, &freq, flags);

		if (val < 0)

			return val;

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