[DLM] show nodeid for recovery message

To aid debugging, it's useful to be able to see what nodeid the dlm is
waiting on for a message reply.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 7c3c2d2..ec7e4011 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -467,6 +467,7 @@
 	struct list_head	ls_requestqueue;/* queue remote requests */
 	struct mutex		ls_requestqueue_mutex;
 	char			*ls_recover_buf;
+	int			ls_recover_nodeid; /* for debugging */
 	struct list_head	ls_recover_list;
 	spinlock_t		ls_recover_list_lock;
 	int			ls_recover_list_count;
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 31ed0fe..7adaad5 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -81,6 +81,11 @@
 	return sprintf(buf, "%x\n", status);
 }
 
+static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf)
+{
+	return sprintf(buf, "%d\n", ls->ls_recover_nodeid);
+}
+
 struct dlm_attr {
 	struct attribute attr;
 	ssize_t (*show)(struct dlm_ls *, char *);
@@ -108,11 +113,17 @@
 	.show  = dlm_recover_status_show
 };
 
+static struct dlm_attr dlm_attr_recover_nodeid = {
+	.attr  = {.name = "recover_nodeid", .mode = S_IRUGO},
+	.show  = dlm_recover_nodeid_show
+};
+
 static struct attribute *dlm_attrs[] = {
 	&dlm_attr_control.attr,
 	&dlm_attr_event.attr,
 	&dlm_attr_id.attr,
 	&dlm_attr_recover_status.attr,
+	&dlm_attr_recover_nodeid.attr,
 	NULL,
 };
 
diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index ebb33c3..a3f7de7 100644
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -176,7 +176,8 @@
 			break;
 	}
 	if (error)
-		log_debug(ls, "ping_members aborted %d", error);
+		log_debug(ls, "ping_members aborted %d last nodeid %d",
+			  error, ls->ls_recover_nodeid);
 	return error;
 }
 
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c
index 55fbe31..5573d85 100644
--- a/fs/dlm/rcom.c
+++ b/fs/dlm/rcom.c
@@ -97,6 +97,7 @@
 	int error = 0;
 
 	memset(ls->ls_recover_buf, 0, dlm_config.buffer_size);
+	ls->ls_recover_nodeid = nodeid;
 
 	if (nodeid == dlm_our_nodeid()) {
 		rc = (struct dlm_rcom *) ls->ls_recover_buf;
@@ -159,6 +160,7 @@
 	int error = 0, len = sizeof(struct dlm_rcom);
 
 	memset(ls->ls_recover_buf, 0, dlm_config.buffer_size);
+	ls->ls_recover_nodeid = nodeid;
 
 	if (nodeid == dlm_our_nodeid()) {
 		dlm_copy_master_names(ls, last_name, last_len,