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2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b 
 kernel/include/linux/dynamic_debug.h
....@@ -47,10 +47,11 @@
4747 } __attribute__((aligned(8)));
4848 
4949 
50
+
51
+#if defined(CONFIG_DYNAMIC_DEBUG_CORE)
52
+
5053 int ddebug_add_module(struct _ddebug *tab, unsigned int n,
5154 				const char *modname);
52
-
53
-#if defined(CONFIG_DYNAMIC_DEBUG)
5455 extern int ddebug_remove_module(const char *mod_name);
5556 extern __printf(2, 3)
5657 void __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...);
....@@ -71,44 +72,43 @@
7172 			  const struct net_device *dev,
7273 			  const char *fmt, ...);
7374 
74
-#define DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, key, init)	\
75
+struct ib_device;
76
+
77
+extern __printf(3, 4)
78
+void __dynamic_ibdev_dbg(struct _ddebug *descriptor,
79
+			 const struct ib_device *ibdev,
80
+			 const char *fmt, ...);
81
+
82
+#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt)		\
7583 	static struct _ddebug  __aligned(8)			\
76
-	__attribute__((section("__verbose"))) name = {		\
84
+	__section("__dyndbg") name = {				\
7785 		.modname = KBUILD_MODNAME,			\
7886 		.function = __func__,				\
7987 		.filename = __FILE__,				\
8088 		.format = (fmt),				\
8189 		.lineno = __LINE__,				\
8290 		.flags = _DPRINTK_FLAGS_DEFAULT,		\
83
-		dd_key_init(key, init)				\
91
+		_DPRINTK_KEY_INIT				\
8492 	}
8593 
8694 #ifdef CONFIG_JUMP_LABEL
8795 
88
-#define dd_key_init(key, init) key = (init)
89
-
9096 #ifdef DEBUG
91
-#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \
92
-	DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, .key.dd_key_true, \
93
-					  (STATIC_KEY_TRUE_INIT))
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+
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+#define _DPRINTK_KEY_INIT .key.dd_key_true = (STATIC_KEY_TRUE_INIT)
9499 
95100 #define DYNAMIC_DEBUG_BRANCH(descriptor) \
96101 	static_branch_likely(&descriptor.key.dd_key_true)
97102 #else
98
-#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \
99
-	DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, .key.dd_key_false, \
100
-					  (STATIC_KEY_FALSE_INIT))
103
+#define _DPRINTK_KEY_INIT .key.dd_key_false = (STATIC_KEY_FALSE_INIT)
101104 
102105 #define DYNAMIC_DEBUG_BRANCH(descriptor) \
103106 	static_branch_unlikely(&descriptor.key.dd_key_false)
104107 #endif
105108 
106
-#else
109
+#else /* !CONFIG_JUMP_LABEL */
107110 
108
-#define dd_key_init(key, init)
109
-
110
-#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \
111
-	DEFINE_DYNAMIC_DEBUG_METADATA_KEY(name, fmt, 0, 0)
111
+#define _DPRINTK_KEY_INIT
112112 
113113 #ifdef DEBUG
114114 #define DYNAMIC_DEBUG_BRANCH(descriptor) \
....@@ -118,47 +118,72 @@
118118 	unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)
119119 #endif
120120 
121
-#endif
121
+#endif /* CONFIG_JUMP_LABEL */
122
+
123
+#define __dynamic_func_call(id, fmt, func, ...) do {	\
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+	DEFINE_DYNAMIC_DEBUG_METADATA(id, fmt);		\
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+	if (DYNAMIC_DEBUG_BRANCH(id))			\
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+		func(&id, ##__VA_ARGS__);		\
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+} while (0)
128
+
129
+#define __dynamic_func_call_no_desc(id, fmt, func, ...) do {	\
130
+	DEFINE_DYNAMIC_DEBUG_METADATA(id, fmt);			\
131
+	if (DYNAMIC_DEBUG_BRANCH(id))				\
132
+		func(__VA_ARGS__);				\
133
+} while (0)
134
+
135
+/*
136
+ * "Factory macro" for generating a call to func, guarded by a
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+ * DYNAMIC_DEBUG_BRANCH. The dynamic debug descriptor will be
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+ * initialized using the fmt argument. The function will be called with
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+ * the address of the descriptor as first argument, followed by all
140
+ * the varargs. Note that fmt is repeated in invocations of this
141
+ * macro.
142
+ */
143
+#define _dynamic_func_call(fmt, func, ...)				\
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+	__dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
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+/*
146
+ * A variant that does the same, except that the descriptor is not
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+ * passed as the first argument to the function; it is only called
148
+ * with precisely the macro's varargs.
149
+ */
150
+#define _dynamic_func_call_no_desc(fmt, func, ...)	\
151
+	__dynamic_func_call_no_desc(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
122152 
123153 #define dynamic_pr_debug(fmt, ...)				\
124
-do {								\
125
-	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);		\
126
-	if (DYNAMIC_DEBUG_BRANCH(descriptor))			\
127
-		__dynamic_pr_debug(&descriptor, pr_fmt(fmt),	\
128
-				   ##__VA_ARGS__);		\
129
-} while (0)
154
+	_dynamic_func_call(fmt,	__dynamic_pr_debug,		\
155
+			   pr_fmt(fmt), ##__VA_ARGS__)
130156 
131157 #define dynamic_dev_dbg(dev, fmt, ...)				\
132
-do {								\
133
-	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);		\
134
-	if (DYNAMIC_DEBUG_BRANCH(descriptor))			\
135
-		__dynamic_dev_dbg(&descriptor, dev, fmt,	\
136
-				  ##__VA_ARGS__);		\
137
-} while (0)
158
+	_dynamic_func_call(fmt,__dynamic_dev_dbg, 		\
159
+			   dev, fmt, ##__VA_ARGS__)
138160 
139161 #define dynamic_netdev_dbg(dev, fmt, ...)			\
140
-do {								\
141
-	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);		\
142
-	if (DYNAMIC_DEBUG_BRANCH(descriptor))			\
143
-		__dynamic_netdev_dbg(&descriptor, dev, fmt,	\
144
-				     ##__VA_ARGS__);		\
145
-} while (0)
162
+	_dynamic_func_call(fmt, __dynamic_netdev_dbg,		\
163
+			   dev, fmt, ##__VA_ARGS__)
146164 
147
-#define dynamic_hex_dump(prefix_str, prefix_type, rowsize,	\
148
-			 groupsize, buf, len, ascii)		\
149
-do {								\
150
-	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor,		\
151
-		__builtin_constant_p(prefix_str) ? prefix_str : "hexdump");\
152
-	if (DYNAMIC_DEBUG_BRANCH(descriptor))			\
153
-		print_hex_dump(KERN_DEBUG, prefix_str,		\
154
-			       prefix_type, rowsize, groupsize,	\
155
-			       buf, len, ascii);		\
156
-} while (0)
165
+#define dynamic_ibdev_dbg(dev, fmt, ...)			\
166
+	_dynamic_func_call(fmt, __dynamic_ibdev_dbg,		\
167
+			   dev, fmt, ##__VA_ARGS__)
157168 
158
-#else
169
+#define dynamic_hex_dump(prefix_str, prefix_type, rowsize,		\
170
+			 groupsize, buf, len, ascii)			\
171
+	_dynamic_func_call_no_desc(__builtin_constant_p(prefix_str) ? prefix_str : "hexdump", \
172
+				   print_hex_dump,			\
173
+				   KERN_DEBUG, prefix_str, prefix_type,	\
174
+				   rowsize, groupsize, buf, len, ascii)
175
+
176
+#else /* !CONFIG_DYNAMIC_DEBUG_CORE */
159177 
160178 #include <linux/string.h>
161179 #include <linux/errno.h>
180
+#include <linux/printk.h>
181
+
182
+static inline int ddebug_add_module(struct _ddebug *tab, unsigned int n,
183
+				    const char *modname)
184
+{
185
+	return 0;
186
+}
162187 
163188 static inline int ddebug_remove_module(const char *mod)
164189 {
....@@ -168,7 +193,7 @@
168193 static inline int ddebug_dyndbg_module_param_cb(char *param, char *val,
169194 						const char *modname)
170195 {
171
-	if (strstr(param, "dyndbg")) {
196
+	if (!strcmp(param, "dyndbg")) {
172197 		/* avoid pr_warn(), which wants pr_fmt() fully defined */
173198 		printk(KERN_WARNING "dyndbg param is supported only in "
174199 			"CONFIG_DYNAMIC_DEBUG builds\n");
....@@ -181,6 +206,13 @@
181206 	do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
182207 #define dynamic_dev_dbg(dev, fmt, ...)					\
183208 	do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0)
184
-#endif
209
+#define dynamic_hex_dump(prefix_str, prefix_type, rowsize,		\
210
+			 groupsize, buf, len, ascii)			\
211
+	do { if (0)							\
212
+		print_hex_dump(KERN_DEBUG, prefix_str, prefix_type,	\
213
+				rowsize, groupsize, buf, len, ascii);	\
214
+	} while (0)
215
+
216
+#endif /* !CONFIG_DYNAMIC_DEBUG_CORE */
185217 
186218 #endif