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Message-Id: <1253977393-7757-1-git-send-email-contact@saschahlusiak.de>
Date: Sat, 26 Sep 2009 17:03:13 +0200
From: Sascha Hlusiak <contact@...chahlusiak.de>
To: netdev@...r.kernel.org
Cc: fred.l.templin@...ing.org,
Sascha Hlusiak <contact@...chahlusiak.de>
Subject: [PATCH] Revert "sit: stateless autoconf for isatap"
This reverts commit 645069299a1c7358cf7330afe293f07552f11a5d.
While the code does not actually break anything, it does not completely follow
RFC5214 yet. After talking back with Fred L. Templin, I agree that completing the
ISATAP specific RS/RA code, would pollute the kernel a lot with code that is better
implemented in userspace.
The kernel should not send RS packages for ISATAP at all.
Signed-off-by: Sascha Hlusiak <contact@...chahlusiak.de>
Acked-by: Fred L. Templin <Fred.L.Templin@...ing.com>
---
include/linux/if_tunnel.h | 2 +-
include/net/ipip.h | 7 -----
net/ipv6/ndisc.c | 1 -
net/ipv6/sit.c | 58 ---------------------------------------------
4 files changed, 1 insertions(+), 67 deletions(-)
diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h
index 5eb9b0f..5a9aae4 100644
--- a/include/linux/if_tunnel.h
+++ b/include/linux/if_tunnel.h
@@ -44,7 +44,7 @@ struct ip_tunnel_prl {
__u16 flags;
__u16 __reserved;
__u32 datalen;
- __u32 rs_delay;
+ __u32 __reserved2;
/* data follows */
};
diff --git a/include/net/ipip.h b/include/net/ipip.h
index 76e3ea6..87acf8f 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -27,18 +27,11 @@ struct ip_tunnel
unsigned int prl_count; /* # of entries in PRL */
};
-/* ISATAP: default interval between RS in secondy */
-#define IPTUNNEL_RS_DEFAULT_DELAY (900)
-
struct ip_tunnel_prl_entry
{
struct ip_tunnel_prl_entry *next;
__be32 addr;
u16 flags;
- unsigned long rs_delay;
- struct timer_list rs_timer;
- struct ip_tunnel *tunnel;
- spinlock_t lock;
};
#define IPTUNNEL_XMIT() do { \
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 498b9b0..f74e4e2 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -658,7 +658,6 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
&icmp6h, NULL,
send_sllao ? ND_OPT_SOURCE_LL_ADDR : 0);
}
-EXPORT_SYMBOL(ndisc_send_rs);
static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index fcb5396..d65e0c4 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -15,7 +15,6 @@
* Roger Venning <r.venning@...stra.com>: 6to4 support
* Nate Thompson <nate@...bog.net>: 6to4 support
* Fred Templin <fred.l.templin@...ing.com>: isatap support
- * Sascha Hlusiak <mail@...chahlusiak.de>: stateless autoconf for isatap
*/
#include <linux/module.h>
@@ -223,44 +222,6 @@ failed:
return NULL;
}
-static void ipip6_tunnel_rs_timer(unsigned long data)
-{
- struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *) data;
- struct inet6_dev *ifp;
- struct inet6_ifaddr *addr;
-
- spin_lock(&p->lock);
- ifp = __in6_dev_get(p->tunnel->dev);
-
- read_lock_bh(&ifp->lock);
- for (addr = ifp->addr_list; addr; addr = addr->if_next) {
- struct in6_addr rtr;
-
- if (!(ipv6_addr_type(&addr->addr) & IPV6_ADDR_LINKLOCAL))
- continue;
-
- /* Send RS to guessed linklocal address of router
- *
- * Better: send to ff02::2 encapsuled in unicast directly
- * to router-v4 instead of guessing the v6 address.
- *
- * Cisco/Windows seem to not set the u/l bit correctly,
- * so we won't guess right.
- */
- ipv6_addr_set(&rtr, htonl(0xFE800000), 0, 0, 0);
- if (!__ipv6_isatap_ifid(rtr.s6_addr + 8,
- p->addr)) {
- ndisc_send_rs(p->tunnel->dev, &addr->addr, &rtr);
- }
- }
- read_unlock_bh(&ifp->lock);
-
- mod_timer(&p->rs_timer, jiffies + HZ * p->rs_delay);
- spin_unlock(&p->lock);
-
- return;
-}
-
static struct ip_tunnel_prl_entry *
__ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr)
{
@@ -319,7 +280,6 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t,
continue;
kp[c].addr = prl->addr;
kp[c].flags = prl->flags;
- kp[c].rs_delay = prl->rs_delay;
c++;
if (kprl.addr != htonl(INADDR_ANY))
break;
@@ -369,23 +329,11 @@ ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg)
}
p->next = t->prl;
- p->tunnel = t;
t->prl = p;
t->prl_count++;
-
- spin_lock_init(&p->lock);
- setup_timer(&p->rs_timer, ipip6_tunnel_rs_timer, (unsigned long) p);
update:
p->addr = a->addr;
p->flags = a->flags;
- p->rs_delay = a->rs_delay;
- if (p->rs_delay == 0)
- p->rs_delay = IPTUNNEL_RS_DEFAULT_DELAY;
- spin_lock(&p->lock);
- del_timer(&p->rs_timer);
- if (p->flags & PRL_DEFAULT)
- mod_timer(&p->rs_timer, jiffies + 1);
- spin_unlock(&p->lock);
out:
write_unlock(&ipip6_lock);
return err;
@@ -404,9 +352,6 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
if ((*p)->addr == a->addr) {
x = *p;
*p = x->next;
- spin_lock(&x->lock);
- del_timer(&x->rs_timer);
- spin_unlock(&x->lock);
kfree(x);
t->prl_count--;
goto out;
@@ -417,9 +362,6 @@ ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a)
while (t->prl) {
x = t->prl;
t->prl = t->prl->next;
- spin_lock(&x->lock);
- del_timer(&x->rs_timer);
- spin_unlock(&x->lock);
kfree(x);
t->prl_count--;
}
--
1.6.5.rc1
--
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