[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: NDavid Teigland <teigland@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/dlm/dlm_internal.h

@@ -467,6 +467,7 @@ struct dlm_ls {
 	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;

fs/dlm/lockspace.c

@@ -81,6 +81,11 @@ static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf)
 	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 @@ static struct dlm_attr dlm_attr_recover_status = {
 	.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,
 };
 

fs/dlm/member.c

@@ -176,7 +176,8 @@ static int ping_members(struct dlm_ls *ls)
 			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;
 }
 

fs/dlm/rcom.c

@@ -97,6 +97,7 @@ int dlm_rcom_status(struct dlm_ls *ls, int nodeid)
 	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 dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len)
 	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,