1 files changed, 30 insertions, 0 deletions

diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index ef5659b211e9..9266c4600208 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -46,6 +46,7 @@ static void	nlmsvc_remove_block(struct nlm_block *block);
 static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock);
 static void nlmsvc_freegrantargs(struct nlm_rqst *call);
 static const struct rpc_call_ops nlmsvc_grant_ops;
+static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie);
 
 /*
  * The list of blocked locks to retry
@@ -934,3 +935,32 @@ nlmsvc_retry_blocked(void)
 
         return timeout;
 }
+
+#ifdef RPC_DEBUG
+static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie)
+{
+        /*
+         * We can get away with a static buffer because we're only
+         * called with BKL held.
+         */
+        static char buf[2*NLM_MAXCOOKIELEN+1];
+        unsigned int i, len = sizeof(buf);
+        char *p = buf;
+
+        len--;  /* allow for trailing \0 */
+        if (len < 3)
+                return "???";
+        for (i = 0 ; i < cookie->len ; i++) {
+                if (len < 2) {
+                        strcpy(p-3, "...");
+                        break;
+                }
+                sprintf(p, "%02x", cookie->data[i]);
+                p += 2;
+                len -= 2;
+        }
+        *p = '\0';
+
+        return buf;
+}
+#endif