2 files changed, 65 insertions, 17 deletions

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index cb26e3d952a2..e5dcfa57e099 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -11,12 +11,14 @@
 #include <linux/types.h>
 #include <linux/slab.h>
 #include <linux/in.h>
+#include <linux/in6.h>
 #include <linux/sunrpc/clnt.h>
 #include <linux/sunrpc/svc.h>
 #include <linux/lockd/lockd.h>
 #include <linux/lockd/sm_inter.h>
 #include <linux/mutex.h>
 
+#include <net/ipv6.h>
 
 #define NLMDBG_FACILITY         NLMDBG_HOSTCACHE
 #define NLM_HOST_NRHASH         32
@@ -38,6 +40,32 @@ static struct nsm_handle *	nsm_find(const struct sockaddr_in *sin,
                                          const char *hostname,
                                          unsigned int hostname_len);
 
+static void nlm_display_address(const struct sockaddr *sap,
+                                char *buf, const size_t len)
+{
+        const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+        const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+
+        switch (sap->sa_family) {
+        case AF_UNSPEC:
+                snprintf(buf, len, "unspecified");
+                break;
+        case AF_INET:
+                snprintf(buf, len, NIPQUAD_FMT, NIPQUAD(sin->sin_addr.s_addr));
+                break;
+        case AF_INET6:
+                if (ipv6_addr_v4mapped(&sin6->sin6_addr))
+                        snprintf(buf, len, NIPQUAD_FMT,
+                                 NIPQUAD(sin6->sin6_addr.s6_addr32[3]));
+                else
+                        snprintf(buf, len, NIP6_FMT, NIP6(sin6->sin6_addr));
+                break;
+        default:
+                snprintf(buf, len, "unsupported address family");
+                break;
+        }
+}
+
 /*
  * Common host lookup routine for server & client
  */
@@ -54,14 +82,10 @@ static struct nlm_host *nlm_lookup_host(int server,
         struct nsm_handle *nsm = NULL;
         int             hash;
 
-        dprintk("lockd: nlm_lookup_host("NIPQUAD_FMT"->"NIPQUAD_FMT
-                        ", p=%d, v=%u, my role=%s, name=%.*s)\n",
-                        NIPQUAD(ssin->sin_addr.s_addr),
-                        NIPQUAD(sin->sin_addr.s_addr), proto, version,
-                        server? "server" : "client",
-                        hostname_len,
-                        hostname? hostname : "<none>");
-
+        dprintk("lockd: nlm_lookup_host(proto=%d, vers=%u,"
+                        " my role is %s, hostname=%.*s)\n",
+                        proto, version, server ? "server" : "client",
+                        hostname_len, hostname ? hostname : "<none>");
 
         hash = NLM_ADDRHASH(sin->sin_addr.s_addr);
 
@@ -101,6 +125,8 @@ static struct nlm_host *nlm_lookup_host(int server,
                 hlist_add_head(&host->h_hash, chain);
 
                 nlm_get_host(host);
+                dprintk("lockd: nlm_lookup_host found host %s (%s)\n",
+                                host->h_name, host->h_addrbuf);
                 goto out;
         }
 
@@ -113,13 +139,17 @@ static struct nlm_host *nlm_lookup_host(int server,
         else {
                 host = NULL;
                 nsm = nsm_find(sin, hostname, hostname_len);
-                if (!nsm)
+                if (!nsm) {
+                        dprintk("lockd: nlm_lookup_host failed; "
+                                "no nsm handle\n");
                         goto out;
+                }
         }
 
         host = kzalloc(sizeof(*host), GFP_KERNEL);
         if (!host) {
                 nsm_release(nsm);
+                dprintk("lockd: nlm_lookup_host failed; no memory\n");
                 goto out;
         }
         host->h_name       = nsm->sm_name;
@@ -146,6 +176,15 @@ static struct nlm_host *nlm_lookup_host(int server,
         INIT_LIST_HEAD(&host->h_reclaim);
 
         nrhosts++;
+
+        nlm_display_address((struct sockaddr *)&host->h_addr,
+                                host->h_addrbuf, sizeof(host->h_addrbuf));
+        nlm_display_address((struct sockaddr *)&host->h_saddr,
+                                host->h_saddrbuf, sizeof(host->h_saddrbuf));
+
+        dprintk("lockd: nlm_lookup_host created host %s\n",
+                        host->h_name);
+
 out:
         mutex_unlock(&nlm_host_mutex);
         return host;
@@ -210,9 +249,8 @@ nlm_bind_host(struct nlm_host *host)
 {
         struct rpc_clnt *clnt;
 
-        dprintk("lockd: nlm_bind_host("NIPQUAD_FMT"->"NIPQUAD_FMT")\n",
-                        NIPQUAD(host->h_saddr.sin_addr),
-                        NIPQUAD(host->h_addr.sin_addr));
+        dprintk("lockd: nlm_bind_host %s (%s), my addr=%s\n",
+                        host->h_name, host->h_addrbuf, host->h_saddrbuf);
 
         /* Lock host handle */
         mutex_lock(&host->h_mutex);
@@ -224,7 +262,7 @@ nlm_bind_host(struct nlm_host *host)
                 if (time_after_eq(jiffies, host->h_nextrebind)) {
                         rpc_force_rebind(clnt);
                         host->h_nextrebind = jiffies + NLM_HOST_REBIND;
-                        dprintk("lockd: next rebind in %ld jiffies\n",
+                        dprintk("lockd: next rebind in %lu jiffies\n",
                                         host->h_nextrebind - jiffies);
                 }
         } else {
@@ -327,12 +365,16 @@ void nlm_host_rebooted(const struct sockaddr_in *sin,
         struct nsm_handle *nsm;
         struct nlm_host *host;
 
-        dprintk("lockd: nlm_host_rebooted(%s, %u.%u.%u.%u)\n",
-                        hostname, NIPQUAD(sin->sin_addr));
-
         /* Find the NSM handle for this peer */
-        if (!(nsm = __nsm_find(sin, hostname, hostname_len, 0)))
+        nsm = __nsm_find(sin, hostname, hostname_len, 0);
+        if (nsm == NULL) {
+                dprintk("lockd: never saw rebooted peer '%.*s' before\n",
+                                hostname_len, hostname);
                 return;
+        }
+
+        dprintk("lockd: nlm_host_rebooted(%.*s, %s)\n",
+                        hostname_len, hostname, nsm->sm_addrbuf);
 
         /* When reclaiming locks on this peer, make sure that
          * we set up a new notification */
@@ -516,6 +558,8 @@ retry:
         nsm->sm_name = (char *) (nsm + 1);
         memcpy(nsm->sm_name, hostname, hostname_len);
         nsm->sm_name[hostname_len] = '\0';
+        nlm_display_address((struct sockaddr *)&nsm->sm_addr,
+                                nsm->sm_addrbuf, sizeof(nsm->sm_addrbuf));
         atomic_set(&nsm->sm_count, 1);
         goto retry;
 
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index dbb87ab282e8..0691efbd0b34 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -61,6 +61,9 @@ struct nlm_host {
         struct list_head        h_granted;      /* Locks in GRANTED state */
         struct list_head        h_reclaim;      /* Locks in RECLAIM state */
         struct nsm_handle *     h_nsmhandle;    /* NSM status handle */
+
+        char                    h_addrbuf[48],  /* address eyecatchers */
+                                h_saddrbuf[48];
 };
 
 struct nsm_handle {
@@ -70,6 +73,7 @@ struct nsm_handle {
         struct sockaddr_in      sm_addr;
         unsigned int            sm_monitored : 1,
                                 sm_sticky : 1;  /* don't unmonitor */
+        char                    sm_addrbuf[48]; /* address eyecatcher */
 };
 
 /*