[PATCH net-next 2/3] ipv6: add a flag to get the flow label used remotly
From: Florent Fourcot <hidden>
Date: 2014-01-14 17:50:19
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
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: Florent Fourcot <redacted> --- include/net/ipv6.h | 2 +- include/uapi/linux/in6.h | 1 + net/ipv6/ip6_flowlabel.c | 7 ++++++- net/ipv6/ipv6_sockglue.c | 5 ++++- 4 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 12079c6..54cb251 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h@@ -252,7 +252,7 @@ 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 ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq, int flags); int ip6_flowlabel_init(void); void ip6_flowlabel_cleanup(void);
diff --git a/include/uapi/linux/in6.h b/include/uapi/linux/in6.h
index a4359b1..2428b80 100644
--- a/include/uapi/linux/in6.h
+++ b/include/uapi/linux/in6.h@@ -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
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index ba23643..2c0f9dc 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c@@ -481,11 +481,16 @@ 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;
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index af0ecb9..a47653a 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c@@ -1220,6 +1220,7 @@ 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;
@@ -1231,9 +1232,11 @@ 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;
--
1.8.5.2