Add debug trace points for freeze/release device queue.

1 files changed, 57 insertions, 0 deletions

diff --git a/sys/cam/cam_xpt.c b/sys/cam/cam_xpt.c
index da0b4da..e50b0ad 100644
--- a/sys/cam/cam_xpt.c
+++ b/sys/cam/cam_xpt.c
@@ -3561,6 +3561,40 @@ xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
 	return (retval);
 }
 
+int
+xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
+{
+	int retval = 0;
+
+	if (path->bus != dev->target->bus) {
+		if (path->bus->path_id == CAM_BUS_WILDCARD)
+			retval = 1;
+		else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
+			retval = 2;
+		else
+			return (-1);
+	}
+	if (path->target != dev->target) {
+		if (path->target->target_id == CAM_TARGET_WILDCARD) {
+			if (retval == 0)
+				retval = 1;
+		} else if (dev->target->target_id == CAM_TARGET_WILDCARD)
+			retval = 2;
+		else
+			return (-1);
+	}
+	if (path->device != dev) {
+		if (path->device->lun_id == CAM_LUN_WILDCARD) {
+			if (retval == 0)
+				retval = 1;
+		} else if (dev->lun_id == CAM_LUN_WILDCARD)
+			retval = 2;
+		else
+			return (-1);
+	}
+	return (retval);
+}
+
 void
 xpt_print_path(struct cam_path *path)
 {
@@ -3594,6 +3628,21 @@ xpt_print_path(struct cam_path *path)
 }
 
 void
+xpt_print_device(struct cam_ed *device)
+{
+
+	if (device == NULL)
+		printf("(nopath): ");
+	else {
+		printf("(noperiph:%s%d:%d:%d:%d): ", device->sim->sim_name,
+		       device->sim->unit_number,
+		       device->sim->bus_id,
+		       device->target->target_id,
+		       device->lun_id);
+	}
+}
+
+void
 xpt_print(struct cam_path *path, const char *fmt, ...)
 {
 	va_list ap;
@@ -4114,6 +4163,8 @@ xpt_freeze_devq(struct cam_path *path, u_int count)
 	struct cam_ed *dev = path->device;
 
 	mtx_assert(path->bus->sim->mtx, MA_OWNED);
+	CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq() %u->%u\n",
+	    dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
 	dev->ccbq.queue.qfrozen_cnt += count;
 	/* Remove frozen device from sendq. */
 	if (device_is_queued(dev)) {
@@ -4138,6 +4189,7 @@ xpt_release_devq_timeout(void *arg)
 	struct cam_ed *device;
 
 	device = (struct cam_ed *)arg;
+	CAM_DEBUG_DEV(device, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
 	xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
 }
 
@@ -4146,6 +4198,8 @@ xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
 {
 
 	mtx_assert(path->bus->sim->mtx, MA_OWNED);
+	CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
+	    count, run_queue));
 	xpt_release_devq_device(path->device, count, run_queue);
 }
 
@@ -4153,6 +4207,9 @@ void
 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
 {
 
+	CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
+	    ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
+	    dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
 	if (count > dev->ccbq.queue.qfrozen_cnt) {
 #ifdef INVARIANTS
 		printf("xpt_release_devq(): requested %u > present %u\n",