[IPV6] xfrm6_tunnel: Delete debugging code.

It doesn't compile, and it's dubious in several regards:

1) is enabled by non-Kconfig controlled CONFIG_* value
   (noted by Randy Dunlap)
2) XFRM6_TUNNEL_SPI_MAGIC is defined after it's first use
3) the debugging messages print object pointer addresses
   which have no meaning without context

So let's just get rid of it.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 130 deletions

diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index 6b44fe8516c3..c8f9369c2a87 100644
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -31,27 +31,6 @@
 #include <linux/icmpv6.h>
 #include <linux/mutex.h>
 
-#ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG
-# define X6TDEBUG       3
-#else
-# define X6TDEBUG       1
-#endif
-
-#define X6TPRINTK(fmt, args...)         printk(fmt, ## args)
-#define X6TNOPRINTK(fmt, args...)       do { ; } while(0)
-
-#if X6TDEBUG >= 1
-# define X6TPRINTK1     X6TPRINTK
-#else
-# define X6TPRINTK1     X6TNOPRINTK
-#endif
-
-#if X6TDEBUG >= 3
-# define X6TPRINTK3     X6TPRINTK
-#else
-# define X6TPRINTK3     X6TNOPRINTK
-#endif
-
 /*
  * xfrm_tunnel_spi things are for allocating unique id ("spi") 
  * per xfrm_address_t.
@@ -62,15 +41,8 @@ struct xfrm6_tunnel_spi {
         xfrm_address_t addr;
         u32 spi;
         atomic_t refcnt;
-#ifdef XFRM6_TUNNEL_SPI_MAGIC
-        u32 magic;
-#endif
 };
 
-#ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG
-# define XFRM6_TUNNEL_SPI_MAGIC 0xdeadbeef
-#endif
-
 static DEFINE_RWLOCK(xfrm6_tunnel_spi_lock);
 
 static u32 xfrm6_tunnel_spi;
@@ -86,43 +58,15 @@ static kmem_cache_t *xfrm6_tunnel_spi_kmem __read_mostly;
 static struct hlist_head xfrm6_tunnel_spi_byaddr[XFRM6_TUNNEL_SPI_BYADDR_HSIZE];
 static struct hlist_head xfrm6_tunnel_spi_byspi[XFRM6_TUNNEL_SPI_BYSPI_HSIZE];
 
-#ifdef XFRM6_TUNNEL_SPI_MAGIC
-static int x6spi_check_magic(const struct xfrm6_tunnel_spi *x6spi,
-                             const char *name)
-{
-        if (unlikely(x6spi->magic != XFRM6_TUNNEL_SPI_MAGIC)) {
-                X6TPRINTK3(KERN_DEBUG "%s(): x6spi object "
-                                      "at %p has corrupted magic %08x "
-                                      "(should be %08x)\n",
-                           name, x6spi, x6spi->magic, XFRM6_TUNNEL_SPI_MAGIC);
-                return -1;
-        }
-        return 0;
-}
-#else
-static int inline x6spi_check_magic(const struct xfrm6_tunnel_spi *x6spi,
-                                    const char *name)
-{
-        return 0;
-}
-#endif
-
-#define X6SPI_CHECK_MAGIC(x6spi) x6spi_check_magic((x6spi), __FUNCTION__)
-
-
 static unsigned inline xfrm6_tunnel_spi_hash_byaddr(xfrm_address_t *addr)
 {
         unsigned h;
 
-        X6TPRINTK3(KERN_DEBUG "%s(addr=%p)\n", __FUNCTION__, addr);
-
         h = addr->a6[0] ^ addr->a6[1] ^ addr->a6[2] ^ addr->a6[3];
         h ^= h >> 16;
         h ^= h >> 8;
         h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1;
 
-        X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, h);
-
         return h;
 }
 
@@ -136,19 +80,13 @@ static int xfrm6_tunnel_spi_init(void)
 {
         int i;
 
-        X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
         xfrm6_tunnel_spi = 0;
         xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi",
                                                   sizeof(struct xfrm6_tunnel_spi),
                                                   0, SLAB_HWCACHE_ALIGN,
                                                   NULL, NULL);
-        if (!xfrm6_tunnel_spi_kmem) {
-                X6TPRINTK1(KERN_ERR
-                           "%s(): failed to allocate xfrm6_tunnel_spi_kmem\n",
-                           __FUNCTION__);
+        if (!xfrm6_tunnel_spi_kmem)
                 return -ENOMEM;
-        }
 
         for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++)
                 INIT_HLIST_HEAD(&xfrm6_tunnel_spi_byaddr[i]);
@@ -161,22 +99,16 @@ static void xfrm6_tunnel_spi_fini(void)
 {
         int i;
 
-        X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
         for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++) {
                 if (!hlist_empty(&xfrm6_tunnel_spi_byaddr[i]))
-                        goto err;
+                        return;
         }
         for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++) {
                 if (!hlist_empty(&xfrm6_tunnel_spi_byspi[i]))
-                        goto err;
+                        return;
         }
         kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
         xfrm6_tunnel_spi_kmem = NULL;
-        return;
-err:
-        X6TPRINTK1(KERN_ERR "%s(): table is not empty\n", __FUNCTION__);
-        return;
 }
 
 static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
@@ -184,19 +116,13 @@ static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
         struct xfrm6_tunnel_spi *x6spi;
         struct hlist_node *pos;
 
-        X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
         hlist_for_each_entry(x6spi, pos,
                              &xfrm6_tunnel_spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
                              list_byaddr) {
-                if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) {
-                        X6SPI_CHECK_MAGIC(x6spi);
-                        X6TPRINTK3(KERN_DEBUG "%s() = %p(%u)\n", __FUNCTION__, x6spi, x6spi->spi);
+                if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0)
                         return x6spi;
-                }
         }
 
-        X6TPRINTK3(KERN_DEBUG "%s() = NULL(0)\n", __FUNCTION__);
         return NULL;
 }
 
@@ -205,8 +131,6 @@ u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr)
         struct xfrm6_tunnel_spi *x6spi;
         u32 spi;
 
-        X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
         read_lock_bh(&xfrm6_tunnel_spi_lock);
         x6spi = __xfrm6_tunnel_spi_lookup(saddr);
         spi = x6spi ? x6spi->spi : 0;
@@ -223,8 +147,6 @@ static u32 __xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
         struct hlist_node *pos;
         unsigned index;
 
-        X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
         if (xfrm6_tunnel_spi < XFRM6_TUNNEL_SPI_MIN ||
             xfrm6_tunnel_spi >= XFRM6_TUNNEL_SPI_MAX)
                 xfrm6_tunnel_spi = XFRM6_TUNNEL_SPI_MIN;
@@ -258,18 +180,10 @@ try_next_2:;
         spi = 0;
         goto out;
 alloc_spi:
-        X6TPRINTK3(KERN_DEBUG "%s(): allocate new spi for " NIP6_FMT "\n",
-                              __FUNCTION__, 
-                              NIP6(*(struct in6_addr *)saddr));
         x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, SLAB_ATOMIC);
-        if (!x6spi) {
-                X6TPRINTK1(KERN_ERR "%s(): kmem_cache_alloc() failed\n", 
-                           __FUNCTION__);
+        if (!x6spi)
                 goto out;
-        }
-#ifdef XFRM6_TUNNEL_SPI_MAGIC
-        x6spi->magic = XFRM6_TUNNEL_SPI_MAGIC;
-#endif
+
         memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr));
         x6spi->spi = spi;
         atomic_set(&x6spi->refcnt, 1);
@@ -278,9 +192,7 @@ alloc_spi:
 
         index = xfrm6_tunnel_spi_hash_byaddr(saddr);
         hlist_add_head(&x6spi->list_byaddr, &xfrm6_tunnel_spi_byaddr[index]);
-        X6SPI_CHECK_MAGIC(x6spi);
 out:
-        X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, spi);
         return spi;
 }
 
@@ -289,8 +201,6 @@ u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
         struct xfrm6_tunnel_spi *x6spi;
         u32 spi;
 
-        X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
         write_lock_bh(&xfrm6_tunnel_spi_lock);
         x6spi = __xfrm6_tunnel_spi_lookup(saddr);
         if (x6spi) {
@@ -300,8 +210,6 @@ u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr)
                 spi = __xfrm6_tunnel_alloc_spi(saddr);
         write_unlock_bh(&xfrm6_tunnel_spi_lock);
 
-        X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, spi);
-
         return spi;
 }
 
@@ -312,8 +220,6 @@ void xfrm6_tunnel_free_spi(xfrm_address_t *saddr)
         struct xfrm6_tunnel_spi *x6spi;
         struct hlist_node *pos, *n;
 
-        X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr);
-
         write_lock_bh(&xfrm6_tunnel_spi_lock);
 
         hlist_for_each_entry_safe(x6spi, pos, n, 
@@ -321,12 +227,6 @@ void xfrm6_tunnel_free_spi(xfrm_address_t *saddr)
                                   list_byaddr)
         {
                 if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) {
-                        X6TPRINTK3(KERN_DEBUG "%s(): x6spi object for " NIP6_FMT 
-                                              " found at %p\n",
-                                   __FUNCTION__, 
-                                   NIP6(*(struct in6_addr *)saddr),
-                                   x6spi);
-                        X6SPI_CHECK_MAGIC(x6spi);
                         if (atomic_dec_and_test(&x6spi->refcnt)) {
                                 hlist_del(&x6spi->list_byaddr);
                                 hlist_del(&x6spi->list_byspi);
@@ -377,20 +277,14 @@ static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                 case ICMPV6_ADDR_UNREACH:
                 case ICMPV6_PORT_UNREACH:
                 default:
-                        X6TPRINTK3(KERN_DEBUG
-                                   "xfrm6_tunnel: Destination Unreach.\n");
                         break;
                 }
                 break;
         case ICMPV6_PKT_TOOBIG:
-                        X6TPRINTK3(KERN_DEBUG 
-                                   "xfrm6_tunnel: Packet Too Big.\n");
                 break;
         case ICMPV6_TIME_EXCEED:
                 switch (code) {
                 case ICMPV6_EXC_HOPLIMIT:
-                        X6TPRINTK3(KERN_DEBUG
-                                   "xfrm6_tunnel: Too small Hoplimit.\n");
                         break;
                 case ICMPV6_EXC_FRAGTIME:
                 default: 
@@ -447,22 +341,14 @@ static struct xfrm6_tunnel xfrm6_tunnel_handler = {
 
 static int __init xfrm6_tunnel_init(void)
 {
-        X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
-        if (xfrm_register_type(&xfrm6_tunnel_type, AF_INET6) < 0) {
-                X6TPRINTK1(KERN_ERR
-                           "xfrm6_tunnel init: can't add xfrm type\n");
+        if (xfrm_register_type(&xfrm6_tunnel_type, AF_INET6) < 0)
                 return -EAGAIN;
-        }
+
         if (xfrm6_tunnel_register(&xfrm6_tunnel_handler)) {
-                X6TPRINTK1(KERN_ERR
-                           "xfrm6_tunnel init(): can't add handler\n");
                 xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
                 return -EAGAIN;
         }
         if (xfrm6_tunnel_spi_init() < 0) {
-                X6TPRINTK1(KERN_ERR
-                           "xfrm6_tunnel init: failed to initialize spi\n");
                 xfrm6_tunnel_deregister(&xfrm6_tunnel_handler);
                 xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
                 return -EAGAIN;
@@ -472,15 +358,9 @@ static int __init xfrm6_tunnel_init(void)
 
 static void __exit xfrm6_tunnel_fini(void)
 {
-        X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__);
-
         xfrm6_tunnel_spi_fini();
-        if (xfrm6_tunnel_deregister(&xfrm6_tunnel_handler))
-                X6TPRINTK1(KERN_ERR 
-                           "xfrm6_tunnel close: can't remove handler\n");
-        if (xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6) < 0)
-                X6TPRINTK1(KERN_ERR
-                           "xfrm6_tunnel close: can't remove xfrm type\n");
+        xfrm6_tunnel_deregister(&xfrm6_tunnel_handler);
+        xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
 }
 
 module_init(xfrm6_tunnel_init);