[IPV6]: Eliminate difference in actions of sysctl and proc handler for conf.all.forwarding
The only difference in this case is that updating all.forwarding
causes the update in default.forwarding when done via proc, but
not via the system call.
Besides, this consolidates a good portion of code.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index dbff389..95cf3aa 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -476,6 +476,21 @@
}
read_unlock(&dev_base_lock);
}
+
+static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old)
+{
+ if (p == &ipv6_devconf_dflt.forwarding)
+ return;
+
+ if (p == &ipv6_devconf.forwarding) {
+ ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
+ addrconf_forward_change();
+ } else if ((!*p) ^ (!old))
+ dev_forward_change((struct inet6_dev *)table->extra1);
+
+ if (*p)
+ rt6_purge_dflt_routers();
+}
#endif
/* Nobody refers to this ifaddr, destroy it */
@@ -3771,22 +3786,8 @@
ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
- if (write && valp != &ipv6_devconf_dflt.forwarding) {
- if (valp != &ipv6_devconf.forwarding) {
- if ((!*valp) ^ (!val)) {
- struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
- if (idev == NULL)
- return ret;
- dev_forward_change(idev);
- }
- } else {
- ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
- addrconf_forward_change();
- }
- if (*valp)
- rt6_purge_dflt_routers();
- }
-
+ if (write)
+ addrconf_fixup_forwarding(ctl, valp, val);
return ret;
}
@@ -3797,6 +3798,7 @@
void __user *newval, size_t newlen)
{
int *valp = table->data;
+ int val = *valp;
int new;
if (!newval || !newlen)
@@ -3821,26 +3823,8 @@
}
}
- if (valp != &ipv6_devconf_dflt.forwarding) {
- if (valp != &ipv6_devconf.forwarding) {
- struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
- int changed;
- if (unlikely(idev == NULL))
- return -ENODEV;
- changed = (!*valp) ^ (!new);
- *valp = new;
- if (changed)
- dev_forward_change(idev);
- } else {
- *valp = new;
- addrconf_forward_change();
- }
-
- if (*valp)
- rt6_purge_dflt_routers();
- } else
- *valp = new;
-
+ *valp = new;
+ addrconf_fixup_forwarding(table, valp, val);
return 1;
}