1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | #ifndef DRBD_POLYMORPH_PRINTK_H |
3 | #define DRBD_POLYMORPH_PRINTK_H |
4 | |
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() |
47 | |
48 | void drbd_printk_with_wrong_object_type(void); |
49 | void drbd_dyn_dbg_with_wrong_object_type(void); |
50 | |
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 | }) |
62 | |
63 | #define drbd_printk(level, obj, fmt, args...) \ |
64 | __builtin_choose_expr( \ |
65 | __drbd_printk_if_same_type(obj, drbd_device, level, fmt, ## args), \ |
66 | __builtin_choose_expr( \ |
67 | __drbd_printk_if_same_type(obj, drbd_resource, level, fmt, ## args), \ |
68 | __builtin_choose_expr( \ |
69 | __drbd_printk_if_same_type(obj, drbd_connection, level, fmt, ## args), \ |
70 | __builtin_choose_expr( \ |
71 | __drbd_printk_if_same_type(obj, drbd_peer_device, level, fmt, ## args), \ |
72 | drbd_printk_with_wrong_object_type())))) |
73 | |
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 | |
112 | |
113 | #define drbd_ratelimit() \ |
114 | ({ \ |
115 | static DEFINE_RATELIMIT_STATE(_rs, \ |
116 | DEFAULT_RATELIMIT_INTERVAL, \ |
117 | DEFAULT_RATELIMIT_BURST); \ |
118 | __ratelimit(&_rs); \ |
119 | }) |
120 | |
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 | */ |
133 | #define expect(x, exp) ({ \ |
134 | bool _bool = (exp); \ |
135 | if (!_bool && drbd_ratelimit()) \ |
136 | drbd_err(x, "ASSERTION %s FAILED in %s\n", \ |
137 | #exp, __func__); \ |
138 | _bool; \ |
139 | }) |
140 | |
141 | #endif |
142 | |