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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/dynamic_debug.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/dynamic_debug.h')
-rw-r--r--include/linux/dynamic_debug.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
new file mode 100644
index 00000000..7e3c53a9
--- /dev/null
+++ b/include/linux/dynamic_debug.h
@@ -0,0 +1,108 @@
+#ifndef _DYNAMIC_DEBUG_H
+#define _DYNAMIC_DEBUG_H
+
+/*
+ * An instance of this structure is created in a special
+ * ELF section at every dynamic debug callsite. At runtime,
+ * the special section is treated as an array of these.
+ */
+struct _ddebug {
+ /*
+ * These fields are used to drive the user interface
+ * for selecting and displaying debug callsites.
+ */
+ const char *modname;
+ const char *function;
+ const char *filename;
+ const char *format;
+ unsigned int lineno:18;
+ /*
+ * The flags field controls the behaviour at the callsite.
+ * The bits here are changed dynamically when the user
+ * writes commands to <debugfs>/dynamic_debug/control
+ */
+#define _DPRINTK_FLAGS_NONE 0
+#define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */
+#define _DPRINTK_FLAGS_INCL_MODNAME (1<<1)
+#define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2)
+#define _DPRINTK_FLAGS_INCL_LINENO (1<<3)
+#define _DPRINTK_FLAGS_INCL_TID (1<<4)
+#if defined DEBUG
+#define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT
+#else
+#define _DPRINTK_FLAGS_DEFAULT 0
+#endif
+ unsigned int flags:8;
+} __attribute__((aligned(8)));
+
+
+int ddebug_add_module(struct _ddebug *tab, unsigned int n,
+ const char *modname);
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+extern int ddebug_remove_module(const char *mod_name);
+extern __printf(2, 3)
+int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...);
+
+struct device;
+
+extern __printf(3, 4)
+int __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev,
+ const char *fmt, ...);
+
+struct net_device;
+
+extern __printf(3, 4)
+int __dynamic_netdev_dbg(struct _ddebug *descriptor,
+ const struct net_device *dev,
+ const char *fmt, ...);
+
+#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \
+ static struct _ddebug __used __aligned(8) \
+ __attribute__((section("__verbose"))) name = { \
+ .modname = KBUILD_MODNAME, \
+ .function = __func__, \
+ .filename = __FILE__, \
+ .format = (fmt), \
+ .lineno = __LINE__, \
+ .flags = _DPRINTK_FLAGS_DEFAULT, \
+ }
+
+#define dynamic_pr_debug(fmt, ...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
+ ##__VA_ARGS__); \
+} while (0)
+
+#define dynamic_dev_dbg(dev, fmt, ...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ __dynamic_dev_dbg(&descriptor, dev, fmt, \
+ ##__VA_ARGS__); \
+} while (0)
+
+#define dynamic_netdev_dbg(dev, fmt, ...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ __dynamic_netdev_dbg(&descriptor, dev, fmt, \
+ ##__VA_ARGS__); \
+} while (0)
+
+#else
+
+static inline int ddebug_remove_module(const char *mod)
+{
+ return 0;
+}
+
+#define dynamic_pr_debug(fmt, ...) \
+ do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
+#define dynamic_dev_dbg(dev, fmt, ...) \
+ do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0)
+#endif
+
+#endif