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Date: Thu, 13 Dec 2012 20:23:22 -0800
From: Joe Perches <joe@...ches.com>
To: "David S. Miller" <davem@...emloft.net>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
James Morris <jmorris@...ei.org>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Patrick McHardy <kaber@...sh.net>
Cc: Duan Jiong <djduanjiong@...il.com>,
Steffen Klassert <steffen.klassert@...unet.com>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH V2] ndisc: Use more standard logging styles
The logging style in this file is "baroque".
Convert indirect uses of net_<level>_ratelimited to
simply use net_<level>_ratelimited.
Add a nd_dbg macro and #define ND_DEBUG for the other
generally inactivated logging messages.
Make those inactivated messages emit only at KERN_DEBUG
instead of other levels. Add "%s: " __func__ to all
these nd_dbg macros and remove the embedded function
names and prefixes.
Signed-off-by: Joe Perches <joe@...ches.com>
---
net/ipv6/ndisc.c | 139 ++++++++++++++++++++++++------------------------------
1 files changed, 61 insertions(+), 78 deletions(-)
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index f2a007b..de1c1f2 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -72,14 +72,19 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
-/* Set to 3 to get tracing... */
-#define ND_DEBUG 1
+/* #define ND_DEBUG */
-#define ND_PRINTK(val, level, fmt, ...) \
+#ifdef ND_DEBUG
+#define nd_dbg(fmt, ...) \
+ net_dbg_ratelimited("%s: " fmt, __func__, ##__VA_ARGS__)
+#else
+#define nd_dbg(fmt, ...) \
do { \
- if (val <= ND_DEBUG) \
- net_##level##_ratelimited(fmt, ##__VA_ARGS__); \
+ if (0) \
+ net_dbg_ratelimited("%s: " fmt, \
+ __func__, ##__VA_ARGS__); \
} while (0)
+#endif
static u32 ndisc_hash(const void *pkey,
const struct net_device *dev,
@@ -220,9 +225,8 @@ struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
case ND_OPT_MTU:
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);
+ nd_dbg("duplicated ND6 option found: type=%d\n",
+ nd_opt->nd_opt_type);
} else {
ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt;
}
@@ -250,11 +254,9 @@ struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
* 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);
+ nd_dbg("ignored unsupported option; type=%d, len=%d\n",
+ nd_opt->nd_opt_type,
+ nd_opt->nd_opt_len);
}
}
opt_len -= l;
@@ -399,8 +401,8 @@ static struct sk_buff *ndisc_build_skb(struct net_device *dev,
len + hlen + tlen),
1, &err);
if (!skb) {
- ND_PRINTK(0, err, "ND: %s failed to allocate an skb, err=%d\n",
- __func__, err);
+ net_err_ratelimited("ND: %s failed to allocate an skb, err=%d\n",
+ __func__, err);
return NULL;
}
@@ -629,9 +631,8 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
if ((probes -= neigh->parms->ucast_probes) < 0) {
if (!(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, neigh, target, target, saddr);
} else if ((probes -= neigh->parms->app_probes) < 0) {
@@ -677,7 +678,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
int is_router = -1;
if (ipv6_addr_is_multicast(&msg->target)) {
- ND_PRINTK(2, warn, "NS: multicast target address\n");
+ nd_dbg("multicast target address\n");
return;
}
@@ -690,20 +691,19 @@ static void ndisc_recv_ns(struct sk_buff *skb)
daddr->s6_addr32[1] == htonl(0x00000000) &&
daddr->s6_addr32[2] == htonl(0x00000001) &&
daddr->s6_addr [12] == 0xff )) {
- ND_PRINTK(2, warn, "NS: bad DAD packet (wrong destination)\n");
+ nd_dbg("bad DAD packet (wrong destination)\n");
return;
}
if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) {
- ND_PRINTK(2, warn, "NS: invalid ND options\n");
+ nd_dbg("invalid ND options\n");
return;
}
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");
+ nd_dbg("invalid link-layer address length\n");
return;
}
@@ -713,8 +713,7 @@ static void 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");
+ nd_dbg("bad DAD packet (link-layer address option)\n");
return;
}
}
@@ -832,30 +831,29 @@ static void ndisc_recv_na(struct sk_buff *skb)
struct neighbour *neigh;
if (skb->len < sizeof(struct nd_msg)) {
- ND_PRINTK(2, warn, "NA: packet too short\n");
+ nd_dbg("packet too short\n");
return;
}
if (ipv6_addr_is_multicast(&msg->target)) {
- ND_PRINTK(2, warn, "NA: target address is multicast\n");
+ nd_dbg("target address is multicast\n");
return;
}
if (ipv6_addr_is_multicast(daddr) &&
msg->icmph.icmp6_solicited) {
- ND_PRINTK(2, warn, "NA: solicited NA is multicasted\n");
+ nd_dbg("solicited NA is multicasted\n");
return;
}
if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) {
- ND_PRINTK(2, warn, "NS: invalid ND option\n");
+ nd_dbg("invalid ND option\n");
return;
}
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");
+ nd_dbg("invalid link-layer address length\n");
return;
}
}
@@ -876,9 +874,8 @@ static void ndisc_recv_na(struct sk_buff *skb)
unsolicited advertisement.
*/
if (skb->pkt_type != PACKET_LOOPBACK)
- ND_PRINTK(1, warn,
- "NA: someone advertises our address %pI6 on %s!\n",
- &ifp->addr, ifp->idev->dev->name);
+ net_warn_ratelimited("NA: someone advertises our address %pI6 on %s!\n",
+ &ifp->addr, ifp->idev->dev->name);
in6_ifa_put(ifp);
return;
}
@@ -940,7 +937,7 @@ static void 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;
}
@@ -957,7 +954,7 @@ static void ndisc_recv_rs(struct sk_buff *skb)
/* Parse ND options */
if (!ndisc_parse_options(rs_msg->opt, ndoptlen, &ndopts)) {
- ND_PRINTK(2, notice, "NS: invalid ND option, ignored\n");
+ nd_dbg("invalid ND option, ignored\n");
goto out;
}
@@ -1043,17 +1040,17 @@ static void ndisc_router_discovery(struct sk_buff *skb)
optlen = (skb->tail - skb->transport_header) - sizeof(struct ra_msg);
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK(2, warn, "RA: source address is not link-local\n");
+ nd_dbg("source address is not link-local\n");
return;
}
if (optlen < 0) {
- ND_PRINTK(2, warn, "RA: packet too short\n");
+ nd_dbg("packet too short\n");
return;
}
#ifdef CONFIG_IPV6_NDISC_NODETYPE
if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
- ND_PRINTK(2, warn, "RA: from host or unauthorized router\n");
+ nd_dbg("from host or unauthorized router\n");
return;
}
#endif
@@ -1064,13 +1061,13 @@ static void ndisc_router_discovery(struct sk_buff *skb)
in6_dev = __in6_dev_get(skb->dev);
if (in6_dev == NULL) {
- 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;
}
if (!ndisc_parse_options(opt, optlen, &ndopts)) {
- ND_PRINTK(2, warn, "RA: invalid ND options\n");
+ nd_dbg("invalid ND options\n");
return;
}
@@ -1123,9 +1120,8 @@ static void ndisc_router_discovery(struct sk_buff *skb)
if (rt) {
neigh = dst_neigh_lookup(&rt->dst, &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__);
ip6_rt_put(rt);
return;
}
@@ -1136,21 +1132,19 @@ static void ndisc_router_discovery(struct sk_buff *skb)
}
if (rt == NULL && lifetime) {
- ND_PRINTK(3, dbg, "RA: adding default router\n");
+ nd_dbg("adding default router\n");
rt = rt6_add_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev, pref);
if (rt == NULL) {
- 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;
}
neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr);
if (neigh == NULL) {
- 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__);
ip6_rt_put(rt);
return;
}
@@ -1218,8 +1212,7 @@ 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");
+ nd_dbg("invalid link-layer address length\n");
goto out;
}
}
@@ -1283,7 +1276,7 @@ skip_routeinfo:
mtu = ntohl(n);
if (mtu < IPV6_MIN_MTU || mtu > skb->dev->mtu) {
- ND_PRINTK(2, warn, "RA: invalid mtu: %d\n", mtu);
+ nd_dbg("invalid mtu: %d\n", mtu);
} else if (in6_dev->cnf.mtu6 != mtu) {
in6_dev->cnf.mtu6 = mtu;
@@ -1304,7 +1297,7 @@ skip_routeinfo:
}
if (ndopts.nd_opts_tgt_lladdr || ndopts.nd_opts_rh) {
- ND_PRINTK(2, warn, "RA: invalid RA options\n");
+ nd_dbg("invalid RA options\n");
}
out:
ip6_rt_put(rt);
@@ -1318,15 +1311,13 @@ static void 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");
+ nd_dbg("from host or unauthorized router\n");
return;
}
#endif
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
- ND_PRINTK(2, warn,
- "Redirect: source address is not link-local\n");
+ nd_dbg("source address is not link-local\n");
return;
}
@@ -1356,15 +1347,13 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
bool ret;
if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) {
- ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n",
- dev->name);
+ nd_dbg("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");
+ nd_dbg("target address is not link-local unicast\n");
return;
}
@@ -1383,8 +1372,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
rt = (struct rt6_info *) dst;
if (rt->rt6i_flags & RTF_GATEWAY) {
- ND_PRINTK(2, warn,
- "Redirect: destination is not a neighbour\n");
+ nd_dbg("destination is not a neighbour\n");
goto release;
}
peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1);
@@ -1397,8 +1385,7 @@ 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");
+ nd_dbg("no neigh for target address\n");
goto release;
}
@@ -1426,9 +1413,8 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
len + hlen + tlen),
1, &err);
if (buff == NULL) {
- ND_PRINTK(0, err,
- "Redirect: %s failed to allocate an skb, err=%d\n",
- __func__, err);
+ net_err_ratelimited("Redirect: %s failed to allocate an skb, err=%d\n",
+ __func__, err);
goto release;
}
@@ -1513,14 +1499,12 @@ int 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);
+ nd_dbg("invalid hop-limit: %d\n", ipv6_hdr(skb)->hop_limit);
return 0;
}
if (msg->icmph.icmp6_code != 0) {
- ND_PRINTK(2, warn, "NDISC: invalid ICMPv6 code: %d\n",
- msg->icmph.icmp6_code);
+ nd_dbg("invalid ICMPv6 code: %d\n", msg->icmph.icmp6_code);
return 0;
}
@@ -1648,9 +1632,8 @@ 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;
}
--
1.7.8.112.g3fd21
--
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