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