fcoe: Add runtime debug logging with module parameter debug_logging
This patch converts all FC_DBG statements to use new runtime tunable
debug macros. The fcoe.ko module now has a debug_logging module
parameter.
fcoe_debug_logging is an unsigned integer representing a bitmask of all
available logging levels. Currently only two logging levels are
supported-
bit
LSB 0 = general fcoe logging
1 = netdevice related logging
This patch also attempts to clean up some debug statement formatting
so it's more readable.
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index a1eb8c1..0d724fa 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -40,6 +40,30 @@
#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
+unsigned int fcoe_debug_logging;
+module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+#define FCOE_LOGGING 0x01 /* General logging, not categorized */
+#define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
+
+#define FCOE_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(fcoe_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0);
+
+#define FCOE_DBG(fmt, args...) \
+ FCOE_CHECK_LOGGING(FCOE_LOGGING, \
+ printk(KERN_INFO "fcoe: " fmt, ##args);)
+
+#define FCOE_NETDEV_DBG(netdev, fmt, args...) \
+ FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING, \
+ printk(KERN_INFO "fcoe: %s" fmt, \
+ netdev->name, ##args);)
+
/*
* this percpu struct for fcoe
*/