net/ipv6: allow sysctl to change link-local address generation mode
The address generation mode for IPv6 link-local can only be configured
by netlink messages. This patch adds the ability to change the address
generation mode via sysctl.
v1 -> v2
Removed the rtnl lock and switch to use RCU lock to iterate through
the netdev list.
v2 -> v3
Removed the addrgenmode variable from the idev structure and use the
systcl storage for the flag.
Simplifed the logic for sysctl handling by removing the supported
for all operation.
Added support for more types of tunnel interfaces for link-local
address generation.
Based the patches from net-next.
v3 -> v4
Removed unnecessary whitespace changes.
Signed-off-by: Felix Jia <felix.jia@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 671d014..71be5b3 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -69,6 +69,7 @@ struct ipv6_devconf {
__s32 seg6_require_hmac;
#endif
__u32 enhanced_dad;
+ __u32 addr_gen_mode;
struct ctl_table_header *sysctl_header;
};
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index 0fa4c32..f656f90 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -205,7 +205,6 @@ struct inet6_dev {
__s32 rs_interval; /* in jiffies */
__u8 rs_probes;
- __u8 addr_gen_mode;
unsigned long tstamp; /* ipv6InterfaceTable update timestamp */
struct rcu_head rcu;
};
diff --git a/include/uapi/linux/ipv6.h b/include/uapi/linux/ipv6.h
index eaf65dc..8ef9e75 100644
--- a/include/uapi/linux/ipv6.h
+++ b/include/uapi/linux/ipv6.h
@@ -182,6 +182,7 @@ enum {
DEVCONF_SEG6_ENABLED,
DEVCONF_SEG6_REQUIRE_HMAC,
DEVCONF_ENHANCED_DAD,
+ DEVCONF_ADDR_GEN_MODE,
DEVCONF_MAX
};