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Diffstat (limited to 'net/ipv6/ndisc.c')
-rw-r--r--net/ipv6/ndisc.c184
1 files changed, 75 insertions, 109 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index ecb5c4b8518f..7d5abb3158ec 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -243,9 +243,8 @@ struct ndisc_options *ndisc_parse_options(const struct net_device *dev,
case ND_OPT_NONCE:
case ND_OPT_REDIRECT_HDR:
if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) {
- ND_PRINTK(2, warn,
- "%s: duplicated ND6 option found: type=%d\n",
- __func__, nd_opt->nd_opt_type);
+ net_dbg_ratelimited("%s: duplicated ND6 option found: type=%d\n",
+ __func__, nd_opt->nd_opt_type);
} else {
ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt;
}
@@ -275,11 +274,8 @@ struct ndisc_options *ndisc_parse_options(const struct net_device *dev,
* to accommodate future extension to the
* protocol.
*/
- ND_PRINTK(2, notice,
- "%s: ignored unsupported option; type=%d, len=%d\n",
- __func__,
- nd_opt->nd_opt_type,
- nd_opt->nd_opt_len);
+ net_dbg_ratelimited("%s: ignored unsupported option; type=%d, len=%d\n",
+ __func__, nd_opt->nd_opt_type, nd_opt->nd_opt_len);
}
next_opt:
opt_len -= l;
@@ -377,24 +373,25 @@ static int ndisc_constructor(struct neighbour *neigh)
static int pndisc_constructor(struct pneigh_entry *n)
{
struct in6_addr *addr = (struct in6_addr *)&n->key;
- struct in6_addr maddr;
struct net_device *dev = n->dev;
+ struct in6_addr maddr;
- if (!dev || !__in6_dev_get(dev))
+ if (!dev)
return -EINVAL;
+
addrconf_addr_solict_mult(addr, &maddr);
- ipv6_dev_mc_inc(dev, &maddr);
- return 0;
+ return ipv6_dev_mc_inc(dev, &maddr);
}
static void pndisc_destructor(struct pneigh_entry *n)
{
struct in6_addr *addr = (struct in6_addr *)&n->key;
- struct in6_addr maddr;
struct net_device *dev = n->dev;
+ struct in6_addr maddr;
- if (!dev || !__in6_dev_get(dev))
+ if (!dev)
return;
+
addrconf_addr_solict_mult(addr, &maddr);
ipv6_dev_mc_dec(dev, &maddr);
}
@@ -473,6 +470,7 @@ void ndisc_send_skb(struct sk_buff *skb, const struct in6_addr *daddr,
{
struct icmp6hdr *icmp6h = icmp6_hdr(skb);
struct dst_entry *dst = skb_dst(skb);
+ struct net_device *dev;
struct inet6_dev *idev;
struct net *net;
struct sock *sk;
@@ -507,11 +505,12 @@ void ndisc_send_skb(struct sk_buff *skb, const struct in6_addr *daddr,
ip6_nd_hdr(skb, saddr, daddr, READ_ONCE(inet6_sk(sk)->hop_limit), skb->len);
- idev = __in6_dev_get(dst->dev);
+ dev = dst_dev(dst);
+ idev = __in6_dev_get(dev);
IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTREQUESTS);
err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT,
- net, sk, skb, NULL, dst->dev,
+ net, sk, skb, NULL, dev,
dst_output);
if (!err) {
ICMP6MSGOUT_INC_STATS(net, idev, type);
@@ -751,9 +750,8 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
probes -= NEIGH_VAR(neigh->parms, UCAST_PROBES);
if (probes < 0) {
if (!(READ_ONCE(neigh->nud_state) & NUD_VALID)) {
- ND_PRINTK(1, dbg,
- "%s: trying to ucast probe in NUD_INVALID: %pI6\n",
- __func__, target);
+ net_dbg_ratelimited("%s: trying to ucast probe in NUD_INVALID: %pI6\n",
+ __func__, target);
}
ndisc_send_ns(dev, target, target, saddr, 0);
} else if ((probes -= NEIGH_VAR(neigh->parms, APP_PROBES)) < 0) {
@@ -770,11 +768,9 @@ static int pndisc_is_router(const void *pkey,
struct pneigh_entry *n;
int ret = -1;
- read_lock_bh(&nd_tbl.lock);
- n = __pneigh_lookup(&nd_tbl, dev_net(dev), pkey, dev);
+ n = pneigh_lookup(&nd_tbl, dev_net(dev), pkey, dev);
if (n)
- ret = !!(n->flags & NTF_ROUTER);
- read_unlock_bh(&nd_tbl.lock);
+ ret = !!(READ_ONCE(n->flags) & NTF_ROUTER);
return ret;
}
@@ -811,7 +807,7 @@ static enum skb_drop_reason ndisc_recv_ns(struct sk_buff *skb)
return SKB_DROP_REASON_PKT_TOO_SMALL;
if (ipv6_addr_is_multicast(&msg->target)) {
- ND_PRINTK(2, warn, "NS: multicast target address\n");
+ net_dbg_ratelimited("NS: multicast target address\n");
return reason;
}
@@ -820,7 +816,7 @@ static enum skb_drop_reason ndisc_recv_ns(struct sk_buff *skb)
* DAD has to be destined for solicited node multicast address.
*/
if (dad && !ipv6_addr_is_solict_mult(daddr)) {
- ND_PRINTK(2, warn, "NS: bad DAD packet (wrong destination)\n");
+ net_dbg_ratelimited("NS: bad DAD packet (wrong destination)\n");
return reason;
}
@@ -830,8 +826,7 @@ static enum skb_drop_reason ndisc_recv_ns(struct sk_buff *skb)
if (ndopts.nd_opts_src_lladdr) {
lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr, dev);
if (!lladdr) {
- ND_PRINTK(2, warn,
- "NS: invalid link-layer address length\n");
+ net_dbg_ratelimited("NS: invalid link-layer address length\n");
return reason;
}
@@ -841,8 +836,7 @@ static enum skb_drop_reason ndisc_recv_ns(struct sk_buff *skb)
* in the message.
*/
if (dad) {
- ND_PRINTK(2, warn,
- "NS: bad DAD packet (link-layer address option)\n");
+ net_dbg_ratelimited("NS: bad DAD packet (link-layer address option)\n");
return reason;
}
}
@@ -859,10 +853,8 @@ have_ifp:
if (nonce != 0 && ifp->dad_nonce == nonce) {
u8 *np = (u8 *)&nonce;
/* Matching nonce if looped back */
- ND_PRINTK(2, notice,
- "%s: IPv6 DAD loopback for address %pI6c nonce %pM ignored\n",
- ifp->idev->dev->name,
- &ifp->addr, np);
+ net_dbg_ratelimited("%s: IPv6 DAD loopback for address %pI6c nonce %pM ignored\n",
+ ifp->idev->dev->name, &ifp->addr, np);
goto out;
}
/*
@@ -1013,13 +1005,13 @@ static enum skb_drop_reason ndisc_recv_na(struct sk_buff *skb)
return SKB_DROP_REASON_PKT_TOO_SMALL;
if (ipv6_addr_is_multicast(&msg->target)) {
- ND_PRINTK(2, warn, "NA: target address is multicast\n");
+ net_dbg_ratelimited("NA: target address is multicast\n");
return reason;
}
if (ipv6_addr_is_multicast(daddr) &&
msg->icmph.icmp6_solicited) {
- ND_PRINTK(2, warn, "NA: solicited NA is multicasted\n");
+ net_dbg_ratelimited("NA: solicited NA is multicasted\n");
return reason;
}
@@ -1038,8 +1030,7 @@ static enum skb_drop_reason ndisc_recv_na(struct sk_buff *skb)
if (ndopts.nd_opts_tgt_lladdr) {
lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, dev);
if (!lladdr) {
- ND_PRINTK(2, warn,
- "NA: invalid link-layer address length\n");
+ net_dbg_ratelimited("NA: invalid link-layer address length\n");
return reason;
}
}
@@ -1060,9 +1051,9 @@ static enum skb_drop_reason ndisc_recv_na(struct sk_buff *skb)
unsolicited advertisement.
*/
if (skb->pkt_type != PACKET_LOOPBACK)
- ND_PRINTK(1, warn,
- "NA: %pM advertised our address %pI6c on %s!\n",
- eth_hdr(skb)->h_source, &ifp->addr, ifp->idev->dev->name);
+ net_warn_ratelimited("NA: %pM advertised our address %pI6c on %s!\n",
+ eth_hdr(skb)->h_source, &ifp->addr,
+ ifp->idev->dev->name);
in6_ifa_put(ifp);
return reason;
}
@@ -1107,7 +1098,7 @@ static enum skb_drop_reason ndisc_recv_na(struct sk_buff *skb)
if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) &&
READ_ONCE(net->ipv6.devconf_all->forwarding) &&
READ_ONCE(net->ipv6.devconf_all->proxy_ndp) &&
- pneigh_lookup(&nd_tbl, net, &msg->target, dev, 0)) {
+ pneigh_lookup(&nd_tbl, net, &msg->target, dev)) {
/* XXX: idev->cnf.proxy_ndp */
goto out;
}
@@ -1149,7 +1140,7 @@ static enum skb_drop_reason ndisc_recv_rs(struct sk_buff *skb)
idev = __in6_dev_get(skb->dev);
if (!idev) {
- ND_PRINTK(1, err, "RS: can't find in6 device\n");
+ net_err_ratelimited("RS: can't find in6 device\n");
return reason;
}
@@ -1257,11 +1248,9 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
optlen = (skb_tail_pointer(skb) - skb_transport_header(skb)) -
sizeof(struct ra_msg);
- ND_PRINTK(2, info,
- "RA: %s, dev: %s\n",
- __func__, skb->dev->name);
+ net_dbg_ratelimited("RA: %s, dev: %s\n", __func__, skb->dev->name);
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK(2, warn, "RA: source address is not link-local\n");
+ net_dbg_ratelimited("RA: source address is not link-local\n");
return reason;
}
if (optlen < 0)
@@ -1269,15 +1258,14 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
#ifdef CONFIG_IPV6_NDISC_NODETYPE
if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
- ND_PRINTK(2, warn, "RA: from host or unauthorized router\n");
+ net_dbg_ratelimited("RA: from host or unauthorized router\n");
return reason;
}
#endif
in6_dev = __in6_dev_get(skb->dev);
if (!in6_dev) {
- ND_PRINTK(0, err, "RA: can't find inet6 device for %s\n",
- skb->dev->name);
+ net_err_ratelimited("RA: can't find inet6 device for %s\n", skb->dev->name);
return reason;
}
@@ -1285,18 +1273,16 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
return SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS;
if (!ipv6_accept_ra(in6_dev)) {
- ND_PRINTK(2, info,
- "RA: %s, did not accept ra for dev: %s\n",
- __func__, skb->dev->name);
+ net_dbg_ratelimited("RA: %s, did not accept ra for dev: %s\n", __func__,
+ skb->dev->name);
goto skip_linkparms;
}
#ifdef CONFIG_IPV6_NDISC_NODETYPE
/* skip link-specific parameters from interior routers */
if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) {
- ND_PRINTK(2, info,
- "RA: %s, nodetype is NODEFAULT, dev: %s\n",
- __func__, skb->dev->name);
+ net_dbg_ratelimited("RA: %s, nodetype is NODEFAULT, dev: %s\n", __func__,
+ skb->dev->name);
goto skip_linkparms;
}
#endif
@@ -1325,18 +1311,16 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
send_ifinfo_notify = true;
if (!READ_ONCE(in6_dev->cnf.accept_ra_defrtr)) {
- ND_PRINTK(2, info,
- "RA: %s, defrtr is false for dev: %s\n",
- __func__, skb->dev->name);
+ net_dbg_ratelimited("RA: %s, defrtr is false for dev: %s\n", __func__,
+ skb->dev->name);
goto skip_defrtr;
}
lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime);
if (lifetime != 0 &&
lifetime < READ_ONCE(in6_dev->cnf.accept_ra_min_lft)) {
- ND_PRINTK(2, info,
- "RA: router lifetime (%ds) is too short: %s\n",
- lifetime, skb->dev->name);
+ net_dbg_ratelimited("RA: router lifetime (%ds) is too short: %s\n", lifetime,
+ skb->dev->name);
goto skip_defrtr;
}
@@ -1346,9 +1330,8 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
net = dev_net(in6_dev->dev);
if (!READ_ONCE(in6_dev->cnf.accept_ra_from_local) &&
ipv6_chk_addr(net, &ipv6_hdr(skb)->saddr, in6_dev->dev, 0)) {
- ND_PRINTK(2, info,
- "RA from local address detected on dev: %s: default router ignored\n",
- skb->dev->name);
+ net_dbg_ratelimited("RA from local address detected on dev: %s: default router ignored\n",
+ skb->dev->name);
goto skip_defrtr;
}
@@ -1366,9 +1349,8 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
rt->fib6_nh->fib_nh_dev, NULL,
&ipv6_hdr(skb)->saddr);
if (!neigh) {
- ND_PRINTK(0, err,
- "RA: %s got default router without neighbour\n",
- __func__);
+ net_err_ratelimited("RA: %s got default router without neighbour\n",
+ __func__);
fib6_info_release(rt);
return reason;
}
@@ -1381,10 +1363,10 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
rt = NULL;
}
- ND_PRINTK(3, info, "RA: rt: %p lifetime: %d, metric: %d, for dev: %s\n",
- rt, lifetime, defrtr_usr_metric, skb->dev->name);
+ net_dbg_ratelimited("RA: rt: %p lifetime: %d, metric: %d, for dev: %s\n", rt, lifetime,
+ defrtr_usr_metric, skb->dev->name);
if (!rt && lifetime) {
- ND_PRINTK(3, info, "RA: adding default router\n");
+ net_dbg_ratelimited("RA: adding default router\n");
if (neigh)
neigh_release(neigh);
@@ -1393,9 +1375,7 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
skb->dev, pref, defrtr_usr_metric,
lifetime);
if (!rt) {
- ND_PRINTK(0, err,
- "RA: %s failed to add default route\n",
- __func__);
+ net_err_ratelimited("RA: %s failed to add default route\n", __func__);
return reason;
}
@@ -1403,9 +1383,8 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
rt->fib6_nh->fib_nh_dev, NULL,
&ipv6_hdr(skb)->saddr);
if (!neigh) {
- ND_PRINTK(0, err,
- "RA: %s got default router without neighbour\n",
- __func__);
+ net_err_ratelimited("RA: %s got default router without neighbour\n",
+ __func__);
fib6_info_release(rt);
return reason;
}
@@ -1436,7 +1415,7 @@ static enum skb_drop_reason ndisc_router_discovery(struct sk_buff *skb)
fib6_metric_set(rt, RTAX_HOPLIMIT,
ra_msg->icmph.icmp6_hop_limit);
} else {
- ND_PRINTK(2, warn, "RA: Got route advertisement with lower hop_limit than minimum\n");
+ net_dbg_ratelimited("RA: Got route advertisement with lower hop_limit than minimum\n");
}
}
@@ -1492,8 +1471,7 @@ skip_linkparms:
lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr,
skb->dev);
if (!lladdr) {
- ND_PRINTK(2, warn,
- "RA: invalid link-layer address length\n");
+ net_dbg_ratelimited("RA: invalid link-layer address length\n");
goto out;
}
}
@@ -1507,9 +1485,8 @@ skip_linkparms:
}
if (!ipv6_accept_ra(in6_dev)) {
- ND_PRINTK(2, info,
- "RA: %s, accept_ra is false for dev: %s\n",
- __func__, skb->dev->name);
+ net_dbg_ratelimited("RA: %s, accept_ra is false for dev: %s\n", __func__,
+ skb->dev->name);
goto out;
}
@@ -1517,9 +1494,8 @@ skip_linkparms:
if (!READ_ONCE(in6_dev->cnf.accept_ra_from_local) &&
ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr,
in6_dev->dev, 0)) {
- ND_PRINTK(2, info,
- "RA from local address detected on dev: %s: router info ignored.\n",
- skb->dev->name);
+ net_dbg_ratelimited("RA from local address detected on dev: %s: router info ignored.\n",
+ skb->dev->name);
goto skip_routeinfo;
}
@@ -1555,9 +1531,8 @@ skip_routeinfo:
#ifdef CONFIG_IPV6_NDISC_NODETYPE
/* skip link-specific ndopts from interior routers */
if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) {
- ND_PRINTK(2, info,
- "RA: %s, nodetype is NODEFAULT (interior routes), dev: %s\n",
- __func__, skb->dev->name);
+ net_dbg_ratelimited("RA: %s, nodetype is NODEFAULT (interior routes), dev: %s\n",
+ __func__, skb->dev->name);
goto out;
}
#endif
@@ -1586,7 +1561,7 @@ skip_routeinfo:
}
if (mtu < IPV6_MIN_MTU || mtu > skb->dev->mtu) {
- ND_PRINTK(2, warn, "RA: invalid mtu: %d\n", mtu);
+ net_dbg_ratelimited("RA: invalid mtu: %d\n", mtu);
} else if (READ_ONCE(in6_dev->cnf.mtu6) != mtu) {
WRITE_ONCE(in6_dev->cnf.mtu6, mtu);
fib6_metric_set(rt, RTAX_MTU, mtu);
@@ -1605,7 +1580,7 @@ skip_routeinfo:
}
if (ndopts.nd_opts_tgt_lladdr || ndopts.nd_opts_rh) {
- ND_PRINTK(2, warn, "RA: invalid RA options\n");
+ net_dbg_ratelimited("RA: invalid RA options\n");
}
out:
/* Send a notify if RA changed managed/otherconf flags or
@@ -1633,15 +1608,13 @@ static enum skb_drop_reason ndisc_redirect_rcv(struct sk_buff *skb)
switch (skb->ndisc_nodetype) {
case NDISC_NODETYPE_HOST:
case NDISC_NODETYPE_NODEFAULT:
- ND_PRINTK(2, warn,
- "Redirect: from host or unauthorized router\n");
+ net_dbg_ratelimited("Redirect: from host or unauthorized router\n");
return reason;
}
#endif
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK(2, warn,
- "Redirect: source address is not link-local\n");
+ net_dbg_ratelimited("Redirect: source address is not link-local\n");
return reason;
}
@@ -1702,15 +1675,13 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
}
if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) {
- ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n",
- dev->name);
+ net_dbg_ratelimited("Redirect: no link-local address on %s\n", dev->name);
return;
}
if (!ipv6_addr_equal(&ipv6_hdr(skb)->daddr, target) &&
ipv6_addr_type(target) != (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK(2, warn,
- "Redirect: target address is not link-local unicast\n");
+ net_dbg_ratelimited("Redirect: target address is not link-local unicast\n");
return;
}
@@ -1729,8 +1700,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
rt = dst_rt6_info(dst);
if (rt->rt6i_flags & RTF_GATEWAY) {
- ND_PRINTK(2, warn,
- "Redirect: destination is not a neighbour\n");
+ net_dbg_ratelimited("Redirect: destination is not a neighbour\n");
goto release;
}
@@ -1743,8 +1713,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
if (dev->addr_len) {
struct neighbour *neigh = dst_neigh_lookup(skb_dst(skb), target);
if (!neigh) {
- ND_PRINTK(2, warn,
- "Redirect: no neigh for target address\n");
+ net_dbg_ratelimited("Redirect: no neigh for target address\n");
goto release;
}
@@ -1845,14 +1814,12 @@ enum skb_drop_reason ndisc_rcv(struct sk_buff *skb)
__skb_push(skb, skb->data - skb_transport_header(skb));
if (ipv6_hdr(skb)->hop_limit != 255) {
- ND_PRINTK(2, warn, "NDISC: invalid hop-limit: %d\n",
- ipv6_hdr(skb)->hop_limit);
+ net_dbg_ratelimited("NDISC: invalid hop-limit: %d\n", ipv6_hdr(skb)->hop_limit);
return SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT;
}
if (msg->icmph.icmp6_code != 0) {
- ND_PRINTK(2, warn, "NDISC: invalid ICMPv6 code: %d\n",
- msg->icmph.icmp6_code);
+ net_dbg_ratelimited("NDISC: invalid ICMPv6 code: %d\n", msg->icmph.icmp6_code);
return SKB_DROP_REASON_IPV6_NDISC_BAD_CODE;
}
@@ -2003,9 +1970,8 @@ static int __net_init ndisc_net_init(struct net *net)
err = inet_ctl_sock_create(&sk, PF_INET6,
SOCK_RAW, IPPROTO_ICMPV6, net);
if (err < 0) {
- ND_PRINTK(0, err,
- "NDISC: Failed to initialize the control socket (err %d)\n",
- err);
+ net_err_ratelimited("NDISC: Failed to initialize the control socket (err %d)\n",
+ err);
return err;
}
generated by cgit (git 2.34.1) at 2025-07-31 18:58:51 +0000