From d1f8297a96b0d70f17704296a6666468f2087ce6 Mon Sep 17 00:00:00 2001 From: Sascha Hlusiak Date: Sat, 26 Sep 2009 20:28:07 -0700 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 Acked-by: Fred L. Templin Signed-off-by: David S. Miller --- 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 insertion(+), 67 deletions(-) diff --git a/include/linux/if_tunnel.h b/include/linux/if_tunnel.h index 5eb9b0f857e0..5a9aae4adb44 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 76e3ea6e2fe5..87acf8f3a155 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 498b9b0b0fad..f74e4e2cdd06 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 fcb539628847..d65e0c496cc0 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -15,7 +15,6 @@ * Roger Venning : 6to4 support * Nate Thompson : 6to4 support * Fred Templin : isatap support - * Sascha Hlusiak : stateless autoconf for isatap */ #include @@ -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--; } -- 2.20.1