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e9d376f0 JB |
1 | #ifndef _DYNAMIC_DEBUG_H |
2 | #define _DYNAMIC_DEBUG_H | |
3 | ||
e9d376f0 JB |
4 | /* |
5 | * An instance of this structure is created in a special | |
6 | * ELF section at every dynamic debug callsite. At runtime, | |
7 | * the special section is treated as an array of these. | |
8 | */ | |
9 | struct _ddebug { | |
10 | /* | |
11 | * These fields are used to drive the user interface | |
12 | * for selecting and displaying debug callsites. | |
13 | */ | |
14 | const char *modname; | |
15 | const char *function; | |
16 | const char *filename; | |
17 | const char *format; | |
e703ddae | 18 | unsigned int lineno:18; |
e9d376f0 JB |
19 | /* |
20 | * The flags field controls the behaviour at the callsite. | |
21 | * The bits here are changed dynamically when the user | |
2b2f68b5 | 22 | * writes commands to <debugfs>/dynamic_debug/control |
e9d376f0 | 23 | */ |
5ca7d2a6 JC |
24 | #define _DPRINTK_FLAGS_NONE 0 |
25 | #define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */ | |
8ba6ebf5 BVA |
26 | #define _DPRINTK_FLAGS_INCL_MODNAME (1<<1) |
27 | #define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2) | |
28 | #define _DPRINTK_FLAGS_INCL_LINENO (1<<3) | |
29 | #define _DPRINTK_FLAGS_INCL_TID (1<<4) | |
b558c96f JC |
30 | #if defined DEBUG |
31 | #define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT | |
32 | #else | |
e9d376f0 | 33 | #define _DPRINTK_FLAGS_DEFAULT 0 |
b558c96f | 34 | #endif |
e9d376f0 JB |
35 | unsigned int flags:8; |
36 | } __attribute__((aligned(8))); | |
37 | ||
38 | ||
39 | int ddebug_add_module(struct _ddebug *tab, unsigned int n, | |
40 | const char *modname); | |
41 | ||
42 | #if defined(CONFIG_DYNAMIC_DEBUG) | |
ff49d74a | 43 | extern int ddebug_remove_module(const char *mod_name); |
b9075fa9 JP |
44 | extern __printf(2, 3) |
45 | int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...); | |
e9d376f0 | 46 | |
cbc46635 JP |
47 | struct device; |
48 | ||
b9075fa9 JP |
49 | extern __printf(3, 4) |
50 | int __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev, | |
51 | const char *fmt, ...); | |
cbc46635 | 52 | |
ffa10cb4 JB |
53 | struct net_device; |
54 | ||
b9075fa9 JP |
55 | extern __printf(3, 4) |
56 | int __dynamic_netdev_dbg(struct _ddebug *descriptor, | |
57 | const struct net_device *dev, | |
58 | const char *fmt, ...); | |
ffa10cb4 | 59 | |
07613b0b JB |
60 | #define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ |
61 | static struct _ddebug __used __aligned(8) \ | |
62 | __attribute__((section("__verbose"))) name = { \ | |
63 | .modname = KBUILD_MODNAME, \ | |
64 | .function = __func__, \ | |
65 | .filename = __FILE__, \ | |
66 | .format = (fmt), \ | |
67 | .lineno = __LINE__, \ | |
68 | .flags = _DPRINTK_FLAGS_DEFAULT, \ | |
07613b0b JB |
69 | } |
70 | ||
71 | #define dynamic_pr_debug(fmt, ...) \ | |
72 | do { \ | |
73 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
87e6f968 | 74 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
07613b0b JB |
75 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ |
76 | ##__VA_ARGS__); \ | |
77 | } while (0) | |
78 | ||
79 | #define dynamic_dev_dbg(dev, fmt, ...) \ | |
80 | do { \ | |
87e6f968 JC |
81 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
82 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ | |
07613b0b JB |
83 | __dynamic_dev_dbg(&descriptor, dev, fmt, \ |
84 | ##__VA_ARGS__); \ | |
85 | } while (0) | |
86 | ||
87 | #define dynamic_netdev_dbg(dev, fmt, ...) \ | |
88 | do { \ | |
89 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
87e6f968 | 90 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
07613b0b JB |
91 | __dynamic_netdev_dbg(&descriptor, dev, fmt, \ |
92 | ##__VA_ARGS__); \ | |
93 | } while (0) | |
ffa10cb4 | 94 | |
e9d376f0 JB |
95 | #else |
96 | ||
ff49d74a | 97 | static inline int ddebug_remove_module(const char *mod) |
e9d376f0 JB |
98 | { |
99 | return 0; | |
100 | } | |
101 | ||
00b55864 JP |
102 | #define dynamic_pr_debug(fmt, ...) \ |
103 | do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0) | |
be70e267 | 104 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
00b55864 | 105 | do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0) |
e9d376f0 JB |
106 | #endif |
107 | ||
108 | #endif |