Commit | Line | Data |
---|---|---|
40652b65 MD |
1 | /* |
2 | * probes/lttng-types.c | |
3 | * | |
4 | * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * LTTng types. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/types.h> | |
11 | #include <linux/seq_file.h> | |
12 | #include <linux/jbd.h> /* tid_t */ | |
13 | #include <linux/debugfs.h> | |
6d2a620c | 14 | #include "../wrapper/symbols.h" /* for wrapper_vmalloc_sync_all() */ |
40652b65 MD |
15 | #include "lttng-types.h" |
16 | ||
17 | struct dentry *lttng_types_dentry; | |
18 | ||
1d12cebd MD |
19 | #undef ENTRY |
20 | #define ENTRY(name) [atype_##name] = #name | |
40652b65 MD |
21 | |
22 | const char * const astract_types[NR_ABSTRACT_TYPES] = { | |
1d12cebd MD |
23 | ENTRY(integer), |
24 | ENTRY(enum), | |
25 | ENTRY(array), | |
26 | ENTRY(sequence), | |
27 | ENTRY(string), | |
28 | }; | |
29 | ||
30 | #undef ENTRY | |
31 | #define ENTRY(name) [lttng_encode_##name] = #name | |
32 | ||
33 | const char * const string_encodings[NR_STRING_ENCODINGS] = { | |
34 | ENTRY(UTF8), | |
35 | ENTRY(ASCII), | |
40652b65 MD |
36 | }; |
37 | ||
38 | #define STAGE_EXPORT_ENUMS | |
39 | #include "lttng-types.h" | |
40 | #include "lttng-type-list.h" | |
41 | #undef STAGE_EXPORT_ENUMS | |
42 | ||
43 | struct lttng_type lttng_types[] = { | |
44 | #define STAGE_EXPORT_TYPES | |
45 | #include "lttng-types.h" | |
46 | #include "lttng-type-list.h" | |
47 | #undef STAGE_EXPORT_TYPES | |
48 | }; | |
49 | ||
d0dd2ecb MD |
50 | static void print_indent(struct seq_file *m, unsigned int indent) |
51 | { | |
52 | int i; | |
53 | ||
54 | for (i = 0; i < indent; i++) | |
55 | seq_printf(m, "\t"); | |
56 | } | |
57 | ||
58 | static void print_enum(struct seq_file *m, unsigned int indent, | |
59 | const struct lttng_enum *lttng_enum) | |
40652b65 MD |
60 | { |
61 | int i; | |
62 | ||
63 | for (i = 0; i < lttng_enum->len; i++) { | |
d0dd2ecb | 64 | print_indent(m, indent); |
40652b65 | 65 | if (lttng_enum->entries[i].start == lttng_enum->entries[i].end) |
d0dd2ecb | 66 | seq_printf(m, "{ %llu, %s },\n", |
40652b65 MD |
67 | lttng_enum->entries[i].start, |
68 | lttng_enum->entries[i].string); | |
69 | else | |
d0dd2ecb | 70 | seq_printf(m, "{ { %llu, %llu }, %s },\n", |
40652b65 MD |
71 | lttng_enum->entries[i].start, |
72 | lttng_enum->entries[i].end, | |
73 | lttng_enum->entries[i].string); | |
74 | } | |
75 | } | |
76 | ||
d0dd2ecb MD |
77 | void lttng_print_event_type(struct seq_file *m, unsigned int indent, |
78 | const struct lttng_type *type) | |
40652b65 | 79 | { |
d0dd2ecb | 80 | print_indent(m, indent); |
40652b65 MD |
81 | switch(type->atype) { |
82 | case atype_integer: | |
d0dd2ecb MD |
83 | seq_printf(m, "type %s%s{ parent = %s; size = %u; signed = %u; align = %u;", |
84 | type->name ? : "", type->name ? " " : "", | |
40652b65 MD |
85 | astract_types[type->atype], |
86 | type->u.integer.size, | |
87 | type->u.integer.signedness, | |
88 | type->u.integer.alignment); | |
1d12cebd | 89 | if (type->u.integer.reverse_byte_order) |
d0dd2ecb | 90 | seq_printf(m, " byte_order = %s;", |
1d12cebd MD |
91 | (__BYTE_ORDER == __LITTLE_ENDIAN) ? |
92 | "be" : "le"); | |
d0dd2ecb | 93 | seq_printf(m, " }"); |
40652b65 MD |
94 | break; |
95 | case atype_enum: | |
d0dd2ecb MD |
96 | seq_printf(m, "type %s%s{ parent = %s; parent.parent = %s; map = {\n", |
97 | type->name ? : "", type->name ? " " : "", | |
40652b65 MD |
98 | astract_types[type->atype], |
99 | type->u.enumeration.parent_type); | |
d0dd2ecb MD |
100 | print_enum(m, indent + 2, &type->u.enumeration.def); |
101 | print_indent(m, indent + 1); | |
102 | seq_printf(m, "};\n"); | |
103 | print_indent(m, indent); | |
104 | seq_printf(m, "}"); | |
40652b65 MD |
105 | break; |
106 | case atype_array: | |
d0dd2ecb MD |
107 | seq_printf(m, "type %s%s{ parent = %s; elem_type = %s; length = %u; }", |
108 | type->name ? : "", type->name ? " " : "", | |
40652b65 MD |
109 | astract_types[type->atype], |
110 | type->u.array.elem_type, | |
111 | type->u.array.length); | |
112 | break; | |
1d12cebd | 113 | case atype_sequence: |
d0dd2ecb MD |
114 | seq_printf(m, "type %s%s{ parent = %s; elem_type = %s; length_type = %s; }", |
115 | type->name ? : "", type->name ? " " : "", | |
1d12cebd MD |
116 | astract_types[type->atype], |
117 | type->u.sequence.elem_type, | |
118 | type->u.sequence.length_type); | |
119 | break; | |
120 | case atype_string: | |
d0dd2ecb MD |
121 | seq_printf(m, "type %s%s{ parent = %s; encoding = %s; }", |
122 | type->name ? : "", type->name ? " " : "", | |
1d12cebd MD |
123 | astract_types[type->atype], |
124 | string_encodings[type->u.string.encoding]); | |
125 | break; | |
40652b65 | 126 | default: |
d0dd2ecb | 127 | seq_printf(m, "<<< unknown abstract type %s for type %s%s>>>", |
40652b65 | 128 | astract_types[type->atype], |
d0dd2ecb | 129 | type->name ? : "", type->name ? " " : ""); |
40652b65 MD |
130 | } |
131 | } | |
d0dd2ecb | 132 | EXPORT_SYMBOL_GPL(lttng_print_event_type); |
40652b65 MD |
133 | |
134 | static void *lttng_seq_start(struct seq_file *m, loff_t *pos) | |
135 | { | |
136 | struct lttng_type *type = <tng_types[*pos]; | |
137 | ||
138 | if (type > <tng_types[ARRAY_SIZE(lttng_types) - 1]) | |
139 | return NULL; | |
140 | return type; | |
141 | } | |
142 | ||
143 | static void *lttng_seq_next(struct seq_file *m, void *v, loff_t *ppos) | |
144 | { | |
145 | struct lttng_type *type = <tng_types[++(*ppos)]; | |
146 | ||
147 | if (type > <tng_types[ARRAY_SIZE(lttng_types) - 1]) | |
148 | return NULL; | |
149 | return type; | |
150 | } | |
151 | ||
152 | static void lttng_seq_stop(struct seq_file *m, void *v) | |
153 | { | |
154 | } | |
155 | ||
156 | static int lttng_seq_show(struct seq_file *m, void *v) | |
157 | { | |
158 | struct lttng_type *type = v; | |
159 | ||
d0dd2ecb MD |
160 | lttng_print_event_type(m, 0, type); |
161 | seq_printf(m, ";\n"); | |
40652b65 MD |
162 | return 0; |
163 | } | |
164 | ||
165 | static const struct seq_operations lttng_types_seq_ops = { | |
166 | .start = lttng_seq_start, | |
167 | .next = lttng_seq_next, | |
168 | .stop = lttng_seq_stop, | |
169 | .show = lttng_seq_show, | |
170 | }; | |
171 | ||
172 | static int | |
173 | lttng_types_open(struct inode *inode, struct file *file) | |
174 | { | |
175 | return seq_open(file, <tng_types_seq_ops); | |
176 | } | |
177 | ||
178 | static const struct file_operations lttng_types_fops = { | |
179 | .open = lttng_types_open, | |
180 | .read = seq_read, | |
181 | .llseek = seq_lseek, | |
182 | .release = seq_release_private, | |
183 | }; | |
184 | ||
185 | static int lttng_types_init(void) | |
186 | { | |
187 | int ret = 0; | |
188 | ||
6d2a620c | 189 | wrapper_vmalloc_sync_all(); |
40652b65 MD |
190 | lttng_types_dentry = debugfs_create_file("lttng-types", S_IWUSR, |
191 | NULL, NULL, <tng_types_fops); | |
192 | if (IS_ERR(lttng_types_dentry) || !lttng_types_dentry) { | |
193 | printk(KERN_ERR "Error creating LTTng type export file\n"); | |
194 | ret = -ENOMEM; | |
195 | goto error; | |
196 | } | |
197 | error: | |
198 | return ret; | |
199 | } | |
200 | ||
201 | module_init(lttng_types_init); | |
202 | ||
203 | static void lttng_types_exit(void) | |
204 | { | |
205 | debugfs_remove(lttng_types_dentry); | |
206 | } | |
207 | ||
208 | module_exit(lttng_types_exit); | |
209 | ||
210 | MODULE_LICENSE("GPL and additional rights"); | |
211 | MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>"); | |
212 | MODULE_DESCRIPTION("LTTng types"); |