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1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | #ifndef DRBD_POLYMORPH_PRINTK_H | |
3 | #define DRBD_POLYMORPH_PRINTK_H | |
4 | ||
aa034695 CB |
5 | #if !defined(CONFIG_DYNAMIC_DEBUG) |
6 | #undef DEFINE_DYNAMIC_DEBUG_METADATA | |
7 | #undef __dynamic_pr_debug | |
8 | #undef DYNAMIC_DEBUG_BRANCH | |
9 | #define DEFINE_DYNAMIC_DEBUG_METADATA(D, F) const char *D = F; ((void)D) | |
10 | #define __dynamic_pr_debug(D, F, args...) do { (void)(D); if (0) printk(F, ## args); } while (0) | |
11 | #define DYNAMIC_DEBUG_BRANCH(D) false | |
12 | #endif | |
13 | ||
14 | ||
15 | #define __drbd_printk_drbd_device_prep(device) \ | |
16 | const struct drbd_device *__d = (device); \ | |
17 | const struct drbd_resource *__r = __d->resource | |
18 | #define __drbd_printk_drbd_device_fmt(fmt) "drbd %s/%u drbd%u: " fmt | |
19 | #define __drbd_printk_drbd_device_args() __r->name, __d->vnr, __d->minor | |
20 | #define __drbd_printk_drbd_device_unprep() | |
21 | ||
22 | #define __drbd_printk_drbd_peer_device_prep(peer_device) \ | |
23 | const struct drbd_device *__d; \ | |
24 | const struct drbd_resource *__r; \ | |
25 | __d = (peer_device)->device; \ | |
26 | __r = __d->resource | |
27 | #define __drbd_printk_drbd_peer_device_fmt(fmt) \ | |
28 | "drbd %s/%u drbd%u: " fmt | |
29 | #define __drbd_printk_drbd_peer_device_args() \ | |
30 | __r->name, __d->vnr, __d->minor | |
31 | #define __drbd_printk_drbd_peer_device_unprep() | |
32 | ||
33 | #define __drbd_printk_drbd_resource_prep(resource) \ | |
34 | const struct drbd_resource *__r = resource | |
35 | #define __drbd_printk_drbd_resource_fmt(fmt) "drbd %s: " fmt | |
36 | #define __drbd_printk_drbd_resource_args() __r->name | |
37 | #define __drbd_printk_drbd_resource_unprep(resource) | |
38 | ||
39 | #define __drbd_printk_drbd_connection_prep(connection) \ | |
40 | const struct drbd_connection *__c = (connection); \ | |
41 | const struct drbd_resource *__r = __c->resource | |
42 | #define __drbd_printk_drbd_connection_fmt(fmt) \ | |
43 | "drbd %s: " fmt | |
44 | #define __drbd_printk_drbd_connection_args() \ | |
45 | __r->name | |
46 | #define __drbd_printk_drbd_connection_unprep() | |
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47 | |
48 | void drbd_printk_with_wrong_object_type(void); | |
aa034695 | 49 | void drbd_dyn_dbg_with_wrong_object_type(void); |
136160c1 | 50 | |
aa034695 CB |
51 | #define __drbd_printk_choose_cond(obj, struct_name) \ |
52 | (__builtin_types_compatible_p(typeof(obj), struct struct_name *) || \ | |
53 | __builtin_types_compatible_p(typeof(obj), const struct struct_name *)) | |
54 | #define __drbd_printk_if_same_type(obj, struct_name, level, fmt, args...) \ | |
55 | __drbd_printk_choose_cond(obj, struct_name), \ | |
56 | ({ \ | |
57 | __drbd_printk_ ## struct_name ## _prep((const struct struct_name *)(obj)); \ | |
58 | printk(level __drbd_printk_ ## struct_name ## _fmt(fmt), \ | |
59 | __drbd_printk_ ## struct_name ## _args(), ## args); \ | |
60 | __drbd_printk_ ## struct_name ## _unprep(); \ | |
61 | }) | |
136160c1 CB |
62 | |
63 | #define drbd_printk(level, obj, fmt, args...) \ | |
64 | __builtin_choose_expr( \ | |
aa034695 | 65 | __drbd_printk_if_same_type(obj, drbd_device, level, fmt, ## args), \ |
136160c1 | 66 | __builtin_choose_expr( \ |
aa034695 | 67 | __drbd_printk_if_same_type(obj, drbd_resource, level, fmt, ## args), \ |
136160c1 | 68 | __builtin_choose_expr( \ |
aa034695 | 69 | __drbd_printk_if_same_type(obj, drbd_connection, level, fmt, ## args), \ |
136160c1 | 70 | __builtin_choose_expr( \ |
aa034695 | 71 | __drbd_printk_if_same_type(obj, drbd_peer_device, level, fmt, ## args), \ |
136160c1 CB |
72 | drbd_printk_with_wrong_object_type())))) |
73 | ||
aa034695 CB |
74 | #define __drbd_dyn_dbg_if_same_type(obj, struct_name, fmt, args...) \ |
75 | __drbd_printk_choose_cond(obj, struct_name), \ | |
76 | ({ \ | |
77 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
78 | if (DYNAMIC_DEBUG_BRANCH(descriptor)) { \ | |
79 | __drbd_printk_ ## struct_name ## _prep((const struct struct_name *)(obj)); \ | |
80 | __dynamic_pr_debug(&descriptor, __drbd_printk_ ## struct_name ## _fmt(fmt), \ | |
81 | __drbd_printk_ ## struct_name ## _args(), ## args); \ | |
82 | __drbd_printk_ ## struct_name ## _unprep(); \ | |
83 | } \ | |
84 | }) | |
85 | ||
86 | #define dynamic_drbd_dbg(obj, fmt, args...) \ | |
87 | __builtin_choose_expr( \ | |
88 | __drbd_dyn_dbg_if_same_type(obj, drbd_device, fmt, ## args), \ | |
89 | __builtin_choose_expr( \ | |
90 | __drbd_dyn_dbg_if_same_type(obj, drbd_resource, fmt, ## args), \ | |
91 | __builtin_choose_expr( \ | |
92 | __drbd_dyn_dbg_if_same_type(obj, drbd_connection, fmt, ## args), \ | |
93 | __builtin_choose_expr( \ | |
94 | __drbd_dyn_dbg_if_same_type(obj, drbd_peer_device, fmt, ## args), \ | |
95 | drbd_dyn_dbg_with_wrong_object_type())))) | |
96 | ||
97 | #define drbd_emerg(device, fmt, args...) \ | |
98 | drbd_printk(KERN_EMERG, device, fmt, ## args) | |
99 | #define drbd_alert(device, fmt, args...) \ | |
100 | drbd_printk(KERN_ALERT, device, fmt, ## args) | |
101 | #define drbd_crit(device, fmt, args...) \ | |
102 | drbd_printk(KERN_CRIT, device, fmt, ## args) | |
103 | #define drbd_err(device, fmt, args...) \ | |
104 | drbd_printk(KERN_ERR, device, fmt, ## args) | |
105 | #define drbd_warn(device, fmt, args...) \ | |
106 | drbd_printk(KERN_WARNING, device, fmt, ## args) | |
107 | #define drbd_notice(device, fmt, args...) \ | |
108 | drbd_printk(KERN_NOTICE, device, fmt, ## args) | |
109 | #define drbd_info(device, fmt, args...) \ | |
110 | drbd_printk(KERN_INFO, device, fmt, ## args) | |
111 | ||
136160c1 | 112 | |
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113 | #define drbd_ratelimit() \ |
114 | ({ \ | |
115 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
116 | DEFAULT_RATELIMIT_INTERVAL, \ | |
117 | DEFAULT_RATELIMIT_BURST); \ | |
118 | __ratelimit(&_rs); \ | |
119 | }) | |
120 | ||
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121 | #define D_ASSERT(x, exp) \ |
122 | do { \ | |
123 | if (!(exp)) \ | |
124 | drbd_err(x, "ASSERTION %s FAILED in %s\n", \ | |
125 | #exp, __func__); \ | |
126 | } while (0) | |
127 | ||
128 | /** | |
129 | * expect - Make an assertion | |
130 | * | |
131 | * Unlike the assert macro, this macro returns a boolean result. | |
132 | */ | |
677b3672 | 133 | #define expect(x, exp) ({ \ |
136160c1 | 134 | bool _bool = (exp); \ |
e3fa02d7 | 135 | if (!_bool && drbd_ratelimit()) \ |
677b3672 | 136 | drbd_err(x, "ASSERTION %s FAILED in %s\n", \ |
aa034695 | 137 | #exp, __func__); \ |
136160c1 CB |
138 | _bool; \ |
139 | }) | |
140 | ||
141 | #endif |