ipv6: Remove privacy config option.

The code for privacy extentions is very mature, and making it
configurable only gives marginal memory/code savings in exchange
for obfuscation and hard to read code via CPP ifdef'ery.

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 4 insertions, 62 deletions

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index a80a63cfb70c..5d89d1b808a6 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -21,13 +21,11 @@ struct ipv6_devconf {
         __s32           force_mld_version;
         __s32           mldv1_unsolicited_report_interval;
         __s32           mldv2_unsolicited_report_interval;
-#ifdef CONFIG_IPV6_PRIVACY
         __s32           use_tempaddr;
         __s32           temp_valid_lft;
         __s32           temp_prefered_lft;
         __s32           regen_max_retry;
         __s32           max_desync_factor;
-#endif
         __s32           max_addresses;
         __s32           accept_ra_defrtr;
         __s32           accept_ra_pinfo;
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index 02ef7727bb55..76d54270f2e2 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -66,11 +66,10 @@ struct inet6_ifaddr {
         struct hlist_node       addr_lst;
         struct list_head        if_list;
 
-#ifdef CONFIG_IPV6_PRIVACY
         struct list_head        tmp_list;
         struct inet6_ifaddr     *ifpub;
         int                     regen_count;
-#endif
+
         bool                    tokenized;
 
         struct rcu_head         rcu;
@@ -192,11 +191,9 @@ struct inet6_dev {
         __u32                   if_flags;
         int                     dead;
 
-#ifdef CONFIG_IPV6_PRIVACY
         u8                      rndid[8];
         struct timer_list       regen_timer;
         struct list_head        tempaddr_list;
-#endif
 
         struct in6_addr         token;
 
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index e1a8d903e366..d92e5586783e 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -21,24 +21,6 @@ menuconfig IPV6
 
 if IPV6
 
-config IPV6_PRIVACY
-        bool "IPv6: Privacy Extensions (RFC 3041) support"
-        ---help---
-          Privacy Extensions for Stateless Address Autoconfiguration in IPv6
-          support.  With this option, additional periodically-altered
-          pseudo-random global-scope unicast address(es) will be assigned to
-          your interface(s).
-        
-          We use our standard pseudo-random algorithm to generate the
-          randomized interface identifier, instead of one described in RFC 3041.
-
-          By default the kernel does not generate temporary addresses.
-          To use temporary addresses, do
-        
-                echo 2 >/proc/sys/net/ipv6/conf/all/use_tempaddr 
-
-          See <file:Documentation/networking/ip-sysctl.txt> for details.
-
 config IPV6_ROUTER_PREF
         bool "IPv6: Router Preference (RFC 4191) support"
         ---help---
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index cd3fb301da38..542d09561ed6 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -83,11 +83,7 @@
 #include <linux/if_tunnel.h>
 #include <linux/rtnetlink.h>
 #include <linux/netconf.h>
-
-#ifdef CONFIG_IPV6_PRIVACY
 #include <linux/random.h>
-#endif
-
 #include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
@@ -124,11 +120,9 @@ static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
 }
 #endif
 
-#ifdef CONFIG_IPV6_PRIVACY
 static void __ipv6_regen_rndid(struct inet6_dev *idev);
 static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
 static void ipv6_regen_rndid(unsigned long data);
-#endif
 
 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
 static int ipv6_count_addresses(struct inet6_dev *idev);
@@ -183,13 +177,11 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
         .rtr_solicits           = MAX_RTR_SOLICITATIONS,
         .rtr_solicit_interval   = RTR_SOLICITATION_INTERVAL,
         .rtr_solicit_delay      = MAX_RTR_SOLICITATION_DELAY,
-#ifdef CONFIG_IPV6_PRIVACY
         .use_tempaddr           = 0,
         .temp_valid_lft         = TEMP_VALID_LIFETIME,
         .temp_prefered_lft      = TEMP_PREFERRED_LIFETIME,
         .regen_max_retry        = REGEN_MAX_RETRY,
         .max_desync_factor      = MAX_DESYNC_FACTOR,
-#endif
         .max_addresses          = IPV6_MAX_ADDRESSES,
         .accept_ra_defrtr       = 1,
         .accept_ra_pinfo        = 1,
@@ -221,13 +213,11 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
         .rtr_solicits           = MAX_RTR_SOLICITATIONS,
         .rtr_solicit_interval   = RTR_SOLICITATION_INTERVAL,
         .rtr_solicit_delay      = MAX_RTR_SOLICITATION_DELAY,
-#ifdef CONFIG_IPV6_PRIVACY
         .use_tempaddr           = 0,
         .temp_valid_lft         = TEMP_VALID_LIFETIME,
         .temp_prefered_lft      = TEMP_PREFERRED_LIFETIME,
         .regen_max_retry        = REGEN_MAX_RETRY,
         .max_desync_factor      = MAX_DESYNC_FACTOR,
-#endif
         .max_addresses          = IPV6_MAX_ADDRESSES,
         .accept_ra_defrtr       = 1,
         .accept_ra_pinfo        = 1,
@@ -371,7 +361,6 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
         }
 #endif
 
-#ifdef CONFIG_IPV6_PRIVACY
         INIT_LIST_HEAD(&ndev->tempaddr_list);
         setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
         if ((dev->flags&IFF_LOOPBACK) ||
@@ -384,7 +373,7 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
                 in6_dev_hold(ndev);
                 ipv6_regen_rndid((unsigned long) ndev);
         }
-#endif
+
         ndev->token = in6addr_any;
 
         if (netif_running(dev) && addrconf_qdisc_ok(dev))
@@ -865,12 +854,10 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
         /* Add to inet6_dev unicast addr list. */
         ipv6_link_dev_addr(idev, ifa);
 
-#ifdef CONFIG_IPV6_PRIVACY
         if (ifa->flags&IFA_F_TEMPORARY) {
                 list_add(&ifa->tmp_list, &idev->tempaddr_list);
                 in6_ifa_hold(ifa);
         }
-#endif
 
         in6_ifa_hold(ifa);
         write_unlock(&idev->lock);
@@ -913,7 +900,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
         spin_unlock_bh(&addrconf_hash_lock);
 
         write_lock_bh(&idev->lock);
-#ifdef CONFIG_IPV6_PRIVACY
+
         if (ifp->flags&IFA_F_TEMPORARY) {
                 list_del(&ifp->tmp_list);
                 if (ifp->ifpub) {
@@ -922,7 +909,6 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
                 }
                 __in6_ifa_put(ifp);
         }
-#endif
 
         list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
                 if (ifa == ifp) {
@@ -1013,7 +999,6 @@ out:
         in6_ifa_put(ifp);
 }
 
-#ifdef CONFIG_IPV6_PRIVACY
 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
 {
         struct inet6_dev *idev = ifp->idev;
@@ -1116,7 +1101,6 @@ retry:
 out:
         return ret;
 }
-#endif
 
 /*
  *      Choose an appropriate source address (RFC3484)
@@ -1131,9 +1115,7 @@ enum {
 #endif
         IPV6_SADDR_RULE_OIF,
         IPV6_SADDR_RULE_LABEL,
-#ifdef CONFIG_IPV6_PRIVACY
         IPV6_SADDR_RULE_PRIVACY,
-#endif
         IPV6_SADDR_RULE_ORCHID,
         IPV6_SADDR_RULE_PREFIX,
         IPV6_SADDR_RULE_MAX
@@ -1247,7 +1229,6 @@ static int ipv6_get_saddr_eval(struct net *net,
                                       &score->ifa->addr, score->addr_type,
                                       score->ifa->idev->dev->ifindex) == dst->label;
                 break;
-#ifdef CONFIG_IPV6_PRIVACY
         case IPV6_SADDR_RULE_PRIVACY:
             {
                 /* Rule 7: Prefer public address
@@ -1259,7 +1240,6 @@ static int ipv6_get_saddr_eval(struct net *net,
                 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
                 break;
             }
-#endif
         case IPV6_SADDR_RULE_ORCHID:
                 /* Rule 8-: Prefer ORCHID vs ORCHID or
                  *          non-ORCHID vs non-ORCHID
@@ -1588,7 +1568,6 @@ static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
                 if (dad_failed)
                         ipv6_ifa_notify(0, ifp);
                 in6_ifa_put(ifp);
-#ifdef CONFIG_IPV6_PRIVACY
         } else if (ifp->flags&IFA_F_TEMPORARY) {
                 struct inet6_ifaddr *ifpub;
                 spin_lock_bh(&ifp->lock);
@@ -1602,7 +1581,6 @@ static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
                         spin_unlock_bh(&ifp->lock);
                 }
                 ipv6_del_addr(ifp);
-#endif
         } else
                 ipv6_del_addr(ifp);
 }
@@ -1851,7 +1829,6 @@ static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
         return err;
 }
 
-#ifdef CONFIG_IPV6_PRIVACY
 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
 static void __ipv6_regen_rndid(struct inet6_dev *idev)
 {
@@ -1919,7 +1896,6 @@ static void  __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmp
         if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
                 __ipv6_regen_rndid(idev);
 }
-#endif
 
 /*
  *      Add prefix route.
@@ -2207,9 +2183,7 @@ ok:
                 if (ifp) {
                         int flags;
                         unsigned long now;
-#ifdef CONFIG_IPV6_PRIVACY
                         struct inet6_ifaddr *ift;
-#endif
                         u32 stored_lft;
 
                         /* update lifetime (RFC2462 5.5.3 e) */
@@ -2250,7 +2224,6 @@ ok:
                         } else
                                 spin_unlock(&ifp->lock);
 
-#ifdef CONFIG_IPV6_PRIVACY
                         read_lock_bh(&in6_dev->lock);
                         /* update all temporary addresses in the list */
                         list_for_each_entry(ift, &in6_dev->tempaddr_list,
@@ -2315,7 +2288,7 @@ ok:
                         } else {
                                 read_unlock_bh(&in6_dev->lock);
                         }
-#endif
+
                         in6_ifa_put(ifp);
                         addrconf_verify(0);
                 }
@@ -2995,7 +2968,6 @@ static int addrconf_ifdown(struct net_device *dev, int how)
         if (!how)
                 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
 
-#ifdef CONFIG_IPV6_PRIVACY
         if (how && del_timer(&idev->regen_timer))
                 in6_dev_put(idev);
 
@@ -3015,7 +2987,6 @@ static int addrconf_ifdown(struct net_device *dev, int how)
                 in6_ifa_put(ifa);
                 write_lock_bh(&idev->lock);
         }
-#endif
 
         while (!list_empty(&idev->addr_list)) {
                 ifa = list_first_entry(&idev->addr_list,
@@ -3528,7 +3499,6 @@ restart:
                                         in6_ifa_put(ifp);
                                         goto restart;
                                 }
-#ifdef CONFIG_IPV6_PRIVACY
                         } else if ((ifp->flags&IFA_F_TEMPORARY) &&
                                    !(ifp->flags&IFA_F_TENTATIVE)) {
                                 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
@@ -3556,7 +3526,6 @@ restart:
                                 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
                                         next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
                                 spin_unlock(&ifp->lock);
-#endif
                         } else {
                                 /* ifp->prefered_lft <= ifp->valid_lft */
                                 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
@@ -4128,13 +4097,11 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
                 jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
         array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
                 jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
-#ifdef CONFIG_IPV6_PRIVACY
         array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
         array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
         array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
         array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
         array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
-#endif
         array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
         array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
         array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
@@ -4828,7 +4795,6 @@ static struct addrconf_sysctl_table
                         .mode           = 0644,
                         .proc_handler   = proc_dointvec_ms_jiffies,
                 },
-#ifdef CONFIG_IPV6_PRIVACY
                 {
                         .procname       = "use_tempaddr",
                         .data           = &ipv6_devconf.use_tempaddr,
@@ -4864,7 +4830,6 @@ static struct addrconf_sysctl_table
                         .mode           = 0644,
                         .proc_handler   = proc_dointvec,
                 },
-#endif
                 {
                         .procname       = "max_addresses",
                         .data           = &ipv6_devconf.max_addresses,