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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; | |
e9d376f0 JB |
18 | unsigned int lineno:24; |
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 JB |
23 | */ |
24 | #define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */ | |
8ba6ebf5 BVA |
25 | #define _DPRINTK_FLAGS_INCL_MODNAME (1<<1) |
26 | #define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2) | |
27 | #define _DPRINTK_FLAGS_INCL_LINENO (1<<3) | |
28 | #define _DPRINTK_FLAGS_INCL_TID (1<<4) | |
b558c96f JC |
29 | #if defined DEBUG |
30 | #define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT | |
31 | #else | |
e9d376f0 | 32 | #define _DPRINTK_FLAGS_DEFAULT 0 |
b558c96f | 33 | #endif |
e9d376f0 JB |
34 | unsigned int flags:8; |
35 | } __attribute__((aligned(8))); | |
36 | ||
37 | ||
38 | int ddebug_add_module(struct _ddebug *tab, unsigned int n, | |
39 | const char *modname); | |
40 | ||
41 | #if defined(CONFIG_DYNAMIC_DEBUG) | |
ff49d74a | 42 | extern int ddebug_remove_module(const char *mod_name); |
b9075fa9 JP |
43 | extern __printf(2, 3) |
44 | int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...); | |
e9d376f0 | 45 | |
cbc46635 JP |
46 | struct device; |
47 | ||
b9075fa9 JP |
48 | extern __printf(3, 4) |
49 | int __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev, | |
50 | const char *fmt, ...); | |
cbc46635 | 51 | |
ffa10cb4 JB |
52 | struct net_device; |
53 | ||
b9075fa9 JP |
54 | extern __printf(3, 4) |
55 | int __dynamic_netdev_dbg(struct _ddebug *descriptor, | |
56 | const struct net_device *dev, | |
57 | const char *fmt, ...); | |
ffa10cb4 | 58 | |
07613b0b JB |
59 | #define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ |
60 | static struct _ddebug __used __aligned(8) \ | |
61 | __attribute__((section("__verbose"))) name = { \ | |
62 | .modname = KBUILD_MODNAME, \ | |
63 | .function = __func__, \ | |
64 | .filename = __FILE__, \ | |
65 | .format = (fmt), \ | |
66 | .lineno = __LINE__, \ | |
67 | .flags = _DPRINTK_FLAGS_DEFAULT, \ | |
07613b0b JB |
68 | } |
69 | ||
70 | #define dynamic_pr_debug(fmt, ...) \ | |
71 | do { \ | |
72 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
87e6f968 | 73 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
07613b0b JB |
74 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ |
75 | ##__VA_ARGS__); \ | |
76 | } while (0) | |
77 | ||
78 | #define dynamic_dev_dbg(dev, fmt, ...) \ | |
79 | do { \ | |
87e6f968 JC |
80 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ |
81 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ | |
07613b0b JB |
82 | __dynamic_dev_dbg(&descriptor, dev, fmt, \ |
83 | ##__VA_ARGS__); \ | |
84 | } while (0) | |
85 | ||
86 | #define dynamic_netdev_dbg(dev, fmt, ...) \ | |
87 | do { \ | |
88 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
87e6f968 | 89 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ |
07613b0b JB |
90 | __dynamic_netdev_dbg(&descriptor, dev, fmt, \ |
91 | ##__VA_ARGS__); \ | |
92 | } while (0) | |
ffa10cb4 | 93 | |
e9d376f0 JB |
94 | #else |
95 | ||
ff49d74a | 96 | static inline int ddebug_remove_module(const char *mod) |
e9d376f0 JB |
97 | { |
98 | return 0; | |
99 | } | |
100 | ||
00b55864 JP |
101 | #define dynamic_pr_debug(fmt, ...) \ |
102 | do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0) | |
be70e267 | 103 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
00b55864 | 104 | do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0) |
e9d376f0 JB |
105 | #endif |
106 | ||
107 | #endif |