]>
Commit | Line | Data |
---|---|---|
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) | |
e9d376f0 JB |
29 | #define _DPRINTK_FLAGS_DEFAULT 0 |
30 | unsigned int flags:8; | |
52159d98 | 31 | char enabled; |
e9d376f0 JB |
32 | } __attribute__((aligned(8))); |
33 | ||
34 | ||
35 | int ddebug_add_module(struct _ddebug *tab, unsigned int n, | |
36 | const char *modname); | |
37 | ||
38 | #if defined(CONFIG_DYNAMIC_DEBUG) | |
ff49d74a | 39 | extern int ddebug_remove_module(const char *mod_name); |
8ba6ebf5 BVA |
40 | extern int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...) |
41 | __attribute__ ((format (printf, 2, 3))); | |
e9d376f0 | 42 | |
cbc46635 JP |
43 | struct device; |
44 | ||
45 | extern int __dynamic_dev_dbg(struct _ddebug *descriptor, | |
46 | const struct device *dev, | |
47 | const char *fmt, ...) | |
48 | __attribute__ ((format (printf, 3, 4))); | |
49 | ||
ffa10cb4 JB |
50 | struct net_device; |
51 | ||
52 | extern int __dynamic_netdev_dbg(struct _ddebug *descriptor, | |
53 | const struct net_device *dev, | |
54 | const char *fmt, ...) | |
55 | __attribute__ ((format (printf, 3, 4))); | |
56 | ||
07613b0b JB |
57 | #define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ |
58 | static struct _ddebug __used __aligned(8) \ | |
59 | __attribute__((section("__verbose"))) name = { \ | |
60 | .modname = KBUILD_MODNAME, \ | |
61 | .function = __func__, \ | |
62 | .filename = __FILE__, \ | |
63 | .format = (fmt), \ | |
64 | .lineno = __LINE__, \ | |
65 | .flags = _DPRINTK_FLAGS_DEFAULT, \ | |
66 | .enabled = false, \ | |
67 | } | |
68 | ||
69 | #define dynamic_pr_debug(fmt, ...) \ | |
70 | do { \ | |
71 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
72 | if (unlikely(descriptor.enabled)) \ | |
73 | __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \ | |
74 | ##__VA_ARGS__); \ | |
75 | } while (0) | |
76 | ||
77 | #define dynamic_dev_dbg(dev, fmt, ...) \ | |
78 | do { \ | |
79 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
80 | if (unlikely(descriptor.enabled)) \ | |
81 | __dynamic_dev_dbg(&descriptor, dev, fmt, \ | |
82 | ##__VA_ARGS__); \ | |
83 | } while (0) | |
84 | ||
85 | #define dynamic_netdev_dbg(dev, fmt, ...) \ | |
86 | do { \ | |
87 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
88 | if (unlikely(descriptor.enabled)) \ | |
89 | __dynamic_netdev_dbg(&descriptor, dev, fmt, \ | |
90 | ##__VA_ARGS__); \ | |
91 | } while (0) | |
ffa10cb4 | 92 | |
e9d376f0 JB |
93 | #else |
94 | ||
ff49d74a | 95 | static inline int ddebug_remove_module(const char *mod) |
e9d376f0 JB |
96 | { |
97 | return 0; | |
98 | } | |
99 | ||
00b55864 JP |
100 | #define dynamic_pr_debug(fmt, ...) \ |
101 | do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0) | |
be70e267 | 102 | #define dynamic_dev_dbg(dev, fmt, ...) \ |
00b55864 | 103 | do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0) |
e9d376f0 JB |
104 | #endif |
105 | ||
106 | #endif |