ceph: debugging

Some debugging infrastructure, including the ability to adjust the
level of debug output on a per-file basis.

diff --git a/fs/ceph/ceph_debug.h b/fs/ceph/ceph_debug.h
new file mode 100644 (file)
index 0000000..2add05c
--- /dev/null
+++ b/fs/ceph/ceph_debug.h
@@ -0,0 +1,86 @@
+#ifndef _FS_CEPH_DEBUG_H
+#define _FS_CEPH_DEBUG_H
+
+#include <linux/string.h>
+
+extern int ceph_debug __read_mostly;         /* debug level. */
+extern int ceph_debug_console __read_mostly; /* send debug output to console? */
+extern int ceph_debug_mask __read_mostly;
+
+/*
+ * different debug levels for different modules.  These default to -1.
+ * If they are >= 0, then they override the global ceph_debug value.
+ */
+extern int ceph_debug_addr __read_mostly;
+extern int ceph_debug_caps __read_mostly;
+extern int ceph_debug_dir __read_mostly;
+extern int ceph_debug_export __read_mostly;
+extern int ceph_debug_file __read_mostly;
+extern int ceph_debug_inode __read_mostly;
+extern int ceph_debug_ioctl __read_mostly;
+extern int ceph_debug_mdsc __read_mostly;
+extern int ceph_debug_mdsmap __read_mostly;
+extern int ceph_debug_msgr __read_mostly;
+extern int ceph_debug_mon __read_mostly;
+extern int ceph_debug_osdc __read_mostly;
+extern int ceph_debug_osdmap __read_mostly;
+extern int ceph_debug_snap __read_mostly;
+extern int ceph_debug_super __read_mostly;
+extern int ceph_debug_protocol __read_mostly;
+extern int ceph_debug_proc __read_mostly;
+extern int ceph_debug_tools __read_mostly;
+
+#define DOUT_MASK_ADDR         0x00000001
+#define DOUT_MASK_CAPS         0x00000002
+#define DOUT_MASK_DIR          0x00000004
+#define DOUT_MASK_EXPORT       0x00000008
+#define DOUT_MASK_FILE         0x00000010
+#define DOUT_MASK_INODE                0x00000020
+#define DOUT_MASK_IOCTL                0x00000040
+#define DOUT_MASK_MDSC         0x00000080
+#define DOUT_MASK_MDSMAP       0x00000100
+#define DOUT_MASK_MSGR         0x00000200
+#define DOUT_MASK_MON          0x00000400
+#define DOUT_MASK_OSDC         0x00000800
+#define DOUT_MASK_OSDMAP       0x00001000
+#define DOUT_MASK_SNAP         0x00002000
+#define DOUT_MASK_SUPER                0x00004000
+#define DOUT_MASK_PROTOCOL     0x00008000
+#define DOUT_MASK_PROC         0x00010000
+#define DOUT_MASK_TOOLS                0x00020000
+
+#define DOUT_UNMASKABLE        0x80000000
+
+#define _STRINGIFY(x) #x
+#define STRINGIFY(x) _STRINGIFY(x)
+
+#define FMT_PREFIX "%-30.30s: "
+#define FMT_SUFFIX "%s"
+#define LOG_ARGS __FILE__ ":" STRINGIFY(__LINE__)
+#define TRAIL_PARAM ""
+
+#define LOG_LINE FMT_PREFIX fmt, LOG_ARGS, args
+
+#define dout_flag(x, mask, fmt, args...) do {                          \
+               if (((ceph_debug_mask | DOUT_UNMASKABLE) & mask) &&     \
+                   ((DOUT_VAR >= 0 && x <= DOUT_VAR) ||                \
+                    (DOUT_VAR < 0 && x <= ceph_debug))) {              \
+                       if (ceph_debug_console)                         \
+                               printk(KERN_ERR FMT_PREFIX fmt, LOG_ARGS, \
+                                      args);                           \
+                       else                                            \
+                               printk(KERN_DEBUG FMT_PREFIX fmt, LOG_ARGS, \
+                                      args);                           \
+               }                                                       \
+       } while (0)
+
+#define _dout(x, fmt, args...) dout_flag(x, DOUT_MASK, fmt FMT_SUFFIX, args)
+
+#define _derr(x, fmt, args...) do {                                    \
+               printk(KERN_ERR FMT_PREFIX fmt FMT_SUFFIX, LOG_ARGS, args); \
+       } while (0)
+
+#define dout(x, args...) _dout(x, args, TRAIL_PARAM)
+#define derr(x, args...) _derr(x, args, TRAIL_PARAM)
+
+#endif