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ipv6: introduce IFA_F_STABLE_PRIVACY flag

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We need to mark appropriate addresses so we can do retries in case their
DAD failed.

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>
This commit is contained in:
Hannes Frederic Sowa 2015-03-23 23:36:02 +01:00 committed by David S. Miller
parent 622c81d57b
commit 64236f3f3d
2 changed files with 9 additions and 6 deletions
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1
include/uapi/linux/if_addr.h
View File

@ -51,6 +51,7 @@ enum {
#define IFA_F_MANAGETEMPADDR 0x100
#define IFA_F_NOPREFIXROUTE 0x200
#define IFA_F_MCAUTOJOIN 0x400
#define IFA_F_STABLE_PRIVACY 0x800
struct ifa_cacheinfo {
__u32 ifa_prefered;

14
net/ipv6/addrconf.c
View File

@ -2199,6 +2199,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
__u32 valid_lft;
__u32 prefered_lft;
int addr_type;
u32 addr_flags = 0;
struct inet6_dev *in6_dev;
struct net *net = dev_net(dev);
@ -2309,6 +2310,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
IN6_ADDR_GEN_MODE_STABLE_PRIVACY &&
!ipv6_generate_stable_address(&addr, 0,
in6_dev)) {
addr_flags |= IFA_F_STABLE_PRIVACY;
goto ok;
} else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
@ -2328,7 +2330,6 @@ ok:
if (ifp == NULL && valid_lft) {
int max_addresses = in6_dev->cnf.max_addresses;
u32 addr_flags = 0;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
if (in6_dev->cnf.optimistic_dad &&
@ -2807,10 +2808,11 @@ static void init_loopback(struct net_device *dev)
}
}
static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
static void addrconf_add_linklocal(struct inet6_dev *idev,
const struct in6_addr *addr, u32 flags)
{
struct inet6_ifaddr *ifp;
u32 addr_flags = IFA_F_PERMANENT;
u32 addr_flags = flags | IFA_F_PERMANENT;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
if (idev->cnf.optimistic_dad &&
@ -2818,7 +2820,6 @@ static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr
addr_flags |= IFA_F_OPTIMISTIC;
#endif
ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
if (!IS_ERR(ifp)) {
@ -2916,7 +2917,8 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_STABLE_PRIVACY) {
if (!ipv6_generate_stable_address(&addr, 0, idev))
addrconf_add_linklocal(idev, &addr);
addrconf_add_linklocal(idev, &addr,
IFA_F_STABLE_PRIVACY);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
} else if (idev->addr_gen_mode == IN6_ADDR_GEN_MODE_EUI64) {
@ -2925,7 +2927,7 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
* couldn't generate one.
*/
if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0)
addrconf_add_linklocal(idev, &addr);
addrconf_add_linklocal(idev, &addr, 0);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
}