diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2015-03-23 23:36:05 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-23 22:12:09 -0400 |
| commit | 1855b7c3e8537c2a4f5a53c797624713bb3becb4 (patch) | |
| tree | 51a7bac158c3051729d0f9a0061cf033c0e3fafc /net/ipv6 | |
| parent | 5f40ef77adb237954d615a76621df1b80a329b31 (diff) | |
| download | linux-1855b7c3e8537c2a4f5a53c797624713bb3becb4.tar.bz2 | |
ipv6: introduce idgen_delay and idgen_retries knobs
This is specified by RFC 7217.
Cc: Erik Kline <ek@google.com>
Cc: Fernando Gont <fgont@si6networks.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: YOSHIFUJI Hideaki/吉藤英明 <hideaki.yoshifuji@miraclelinux.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/addrconf.c | 11 | ||||
| -rw-r--r-- | net/ipv6/af_inet6.c | 2 | ||||
| -rw-r--r-- | net/ipv6/sysctl_net_ipv6.c | 16 |
3 files changed, 22 insertions, 7 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 9b51fdb42ba9..d2d238334a11 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1712,6 +1712,7 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp) { struct in6_addr addr; struct inet6_dev *idev = ifp->idev; + struct net *net = dev_net(ifp->idev->dev); if (addrconf_dad_end(ifp)) { in6_ifa_put(ifp); @@ -1730,11 +1731,9 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp) struct inet6_ifaddr *ifp2; u32 valid_lft, preferred_lft; int pfxlen = ifp->prefix_len; - const unsigned int idgen_retries = 3; - const unsigned int idgen_delay = 1 * HZ; int retries = ifp->stable_privacy_retry + 1; - if (retries > idgen_retries) { + if (retries > net->ipv6.sysctl.idgen_retries) { net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", ifp->idev->dev->name); goto errdad; @@ -1769,7 +1768,7 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp) ifp2->state = INET6_IFADDR_STATE_PREDAD; spin_unlock_bh(&ifp2->lock); - addrconf_mod_dad_work(ifp2, idgen_delay); + addrconf_mod_dad_work(ifp2, net->ipv6.sysctl.idgen_delay); in6_ifa_put(ifp2); lock_errdad: spin_lock_bh(&ifp->lock); @@ -2899,8 +2898,6 @@ static int ipv6_generate_stable_address(struct in6_addr *address, u8 dad_count, const struct inet6_dev *idev) { - static const int idgen_retries = 3; - static DEFINE_SPINLOCK(lock); static __u32 digest[SHA_DIGEST_WORDS]; static __u32 workspace[SHA_WORKSPACE_WORDS]; @@ -2950,7 +2947,7 @@ retry: if (ipv6_reserved_interfaceid(temp)) { dad_count++; - if (dad_count > idgen_retries) + if (dad_count > dev_net(idev->dev)->ipv6.sysctl.idgen_retries) return -1; goto retry; } diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 6bafcc2c79e3..d8dcc526339e 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -766,6 +766,8 @@ static int __net_init inet6_net_init(struct net *net) net->ipv6.sysctl.icmpv6_time = 1*HZ; net->ipv6.sysctl.flowlabel_consistency = 1; net->ipv6.sysctl.auto_flowlabels = 0; + net->ipv6.sysctl.idgen_retries = 3; + net->ipv6.sysctl.idgen_delay = 1 * HZ; atomic_set(&net->ipv6.fib6_sernum, 1); err = ipv6_init_mibs(net); diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c index c5c10fafcfe2..30f5a4ad04eb 100644 --- a/net/ipv6/sysctl_net_ipv6.c +++ b/net/ipv6/sysctl_net_ipv6.c @@ -54,6 +54,20 @@ static struct ctl_table ipv6_table_template[] = { .mode = 0644, .proc_handler = proc_dointvec }, + { + .procname = "idgen_retries", + .data = &init_net.ipv6.sysctl.idgen_retries, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { + .procname = "idgen_delay", + .data = &init_net.ipv6.sysctl.idgen_delay, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_jiffies, + }, { } }; @@ -93,6 +107,8 @@ static int __net_init ipv6_sysctl_net_init(struct net *net) ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency; ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels; ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect; + ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries; + ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay; ipv6_route_table = ipv6_route_sysctl_init(net); if (!ipv6_route_table) |