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Date: Sat, 2 Nov 2013 17:58:44 +0100 From: Florent Fourcot <florent.fourcot@...t-bretagne.fr> To: netdev@...r.kernel.org Cc: Florent Fourcot <florent.fourcot@...t-bretagne.fr> Subject: [PATCH RFC] ipv6: enable IPV6_FLOWLABEL_MGR for getsockopt It is already possible to set/put/renew a label with IPV6_FLOWLABEL_MGR and setsockopt. This patch add the possibility to get information about this label (current value, time before expiration, etc). It helps application to take decision for a renew or a release of the label. Signed-off-by: Florent Fourcot <florent.fourcot@...t-bretagne.fr> --- include/net/ipv6.h | 1 + net/ipv6/ip6_flowlabel.c | 23 +++++++++++++++++++++++ net/ipv6/ipv6_sockglue.c | 23 +++++++++++++++++++++++ 3 files changed, 47 insertions(+) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index dd96638..2a5f668 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -250,6 +250,7 @@ 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 ip6_flowlabel_init(void); void ip6_flowlabel_cleanup(void); diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index 819578e..34f58b7 100644 --- a/net/ipv6/ip6_flowlabel.c +++ b/net/ipv6/ip6_flowlabel.c @@ -475,6 +475,29 @@ 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) +{ + struct ipv6_pinfo *np = inet6_sk(sk); + struct ipv6_fl_socklist *sfl; + + rcu_read_lock_bh(); + for_each_sk_fl_rcu(np, sfl) { + if (sfl->fl->label == (np->flow_label & IPV6_FLOWLABEL_MASK)) { + freq->flr_label = sfl->fl->label; + freq->flr_dst = sfl->fl->dst; + freq->flr_share = sfl->fl->share; + freq->flr_expires = (sfl->fl->expires - jiffies) / HZ; + freq->flr_linger = sfl->fl->linger / HZ; + + rcu_read_unlock_bh(); + return 0; + } + } + rcu_read_unlock_bh(); + + return 0; +} + int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen) { int uninitialized_var(err); diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 4919a8e..9ca96c2 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -1212,6 +1212,29 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, val = np->sndflow; break; + case IPV6_FLOWLABEL_MGR: + { + struct in6_flowlabel_req freq; + + if (len < sizeof(freq)) + return -EINVAL; + + len = sizeof(freq); + memset(&freq, 0, sizeof(freq)); + + val = ipv6_flowlabel_opt_get(sk, &freq); + if (val < 0) + return val; + + if (put_user(len, optlen)) + return -EFAULT; + if (copy_to_user(optval, &freq, len)) + return -EFAULT; + + return 0; + break; + } + case IPV6_ADDR_PREFERENCES: val = 0; -- 1.8.4.rc3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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