移去rt

hc

2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/btf.h
..
..
@@ -5,10 +5,16 @@
5
5
 #define _LINUX_BTF_H 1
6
6
 
7
7
 #include <linux/types.h>
8
+#include <uapi/linux/btf.h>
9
+#include <uapi/linux/bpf.h>
10
+
11
+#define BTF_TYPE_EMIT(type) ((void)(type *)0)
8
12
 
9
13
 struct btf;
14
+struct btf_member;
10
15
 struct btf_type;
11
16
 union bpf_attr;
17
+struct btf_show;
12
18
 
13
19
 extern const struct file_operations btf_fops;
14
20
 
..
..
@@ -42,9 +48,179 @@
42
48
 const struct btf_type *btf_type_id_size(const struct btf *btf,
43
49
 					u32 *type_id,
44
50
 					u32 *ret_size);
51
+
52
+/*
53
+ * Options to control show behaviour.
54
+ *	- BTF_SHOW_COMPACT: no formatting around type information
55
+ *	- BTF_SHOW_NONAME: no struct/union member names/types
56
+ *	- BTF_SHOW_PTR_RAW: show raw (unobfuscated) pointer values;
57
+ *	  equivalent to %px.
58
+ *	- BTF_SHOW_ZERO: show zero-valued struct/union members; they
59
+ *	  are not displayed by default
60
+ *	- BTF_SHOW_UNSAFE: skip use of bpf_probe_read() to safely read
61
+ *	  data before displaying it.
62
+ */
63
+#define BTF_SHOW_COMPACT	BTF_F_COMPACT
64
+#define BTF_SHOW_NONAME		BTF_F_NONAME
65
+#define BTF_SHOW_PTR_RAW	BTF_F_PTR_RAW
66
+#define BTF_SHOW_ZERO		BTF_F_ZERO
67
+#define BTF_SHOW_UNSAFE		(1ULL << 4)
68
+
45
69
 void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj,
46
70
 		       struct seq_file *m);
71
+int btf_type_seq_show_flags(const struct btf *btf, u32 type_id, void *obj,
72
+			    struct seq_file *m, u64 flags);
73
+
74
+/*
75
+ * Copy len bytes of string representation of obj of BTF type_id into buf.
76
+ *
77
+ * @btf: struct btf object
78
+ * @type_id: type id of type obj points to
79
+ * @obj: pointer to typed data
80
+ * @buf: buffer to write to
81
+ * @len: maximum length to write to buf
82
+ * @flags: show options (see above)
83
+ *
84
+ * Return: length that would have been/was copied as per snprintf, or
85
+ *	   negative error.
86
+ */
87
+int btf_type_snprintf_show(const struct btf *btf, u32 type_id, void *obj,
88
+			   char *buf, int len, u64 flags);
89
+
47
90
 int btf_get_fd_by_id(u32 id);
48
91
 u32 btf_id(const struct btf *btf);
92
+bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s,
93
+			   const struct btf_member *m,
94
+			   u32 expected_offset, u32 expected_size);
95
+int btf_find_spin_lock(const struct btf *btf, const struct btf_type *t);
96
+bool btf_type_is_void(const struct btf_type *t);
97
+s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind);
98
+const struct btf_type *btf_type_skip_modifiers(const struct btf *btf,
99
+					       u32 id, u32 *res_id);
100
+const struct btf_type *btf_type_resolve_ptr(const struct btf *btf,
101
+					    u32 id, u32 *res_id);
102
+const struct btf_type *btf_type_resolve_func_ptr(const struct btf *btf,
103
+						 u32 id, u32 *res_id);
104
+const struct btf_type *
105
+btf_resolve_size(const struct btf *btf, const struct btf_type *type,
106
+		 u32 *type_size);
107
+
108
+#define for_each_member(i, struct_type, member)			\
109
+	for (i = 0, member = btf_type_member(struct_type);	\
110
+	     i < btf_type_vlen(struct_type);			\
111
+	     i++, member++)
112
+
113
+#define for_each_vsi(i, datasec_type, member)			\
114
+	for (i = 0, member = btf_type_var_secinfo(datasec_type);	\
115
+	     i < btf_type_vlen(datasec_type);			\
116
+	     i++, member++)
117
+
118
+static inline bool btf_type_is_ptr(const struct btf_type *t)
119
+{
120
+	return BTF_INFO_KIND(t->info) == BTF_KIND_PTR;
121
+}
122
+
123
+static inline bool btf_type_is_int(const struct btf_type *t)
124
+{
125
+	return BTF_INFO_KIND(t->info) == BTF_KIND_INT;
126
+}
127
+
128
+static inline bool btf_type_is_small_int(const struct btf_type *t)
129
+{
130
+	return btf_type_is_int(t) && t->size <= sizeof(u64);
131
+}
132
+
133
+static inline bool btf_type_is_enum(const struct btf_type *t)
134
+{
135
+	return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM;
136
+}
137
+
138
+static inline bool btf_type_is_typedef(const struct btf_type *t)
139
+{
140
+	return BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF;
141
+}
142
+
143
+static inline bool btf_type_is_func(const struct btf_type *t)
144
+{
145
+	return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC;
146
+}
147
+
148
+static inline bool btf_type_is_func_proto(const struct btf_type *t)
149
+{
150
+	return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC_PROTO;
151
+}
152
+
153
+static inline bool btf_type_is_var(const struct btf_type *t)
154
+{
155
+	return BTF_INFO_KIND(t->info) == BTF_KIND_VAR;
156
+}
157
+
158
+/* union is only a special case of struct:
159
+ * all its offsetof(member) == 0
160
+ */
161
+static inline bool btf_type_is_struct(const struct btf_type *t)
162
+{
163
+	u8 kind = BTF_INFO_KIND(t->info);
164
+
165
+	return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION;
166
+}
167
+
168
+static inline u16 btf_type_vlen(const struct btf_type *t)
169
+{
170
+	return BTF_INFO_VLEN(t->info);
171
+}
172
+
173
+static inline u16 btf_func_linkage(const struct btf_type *t)
174
+{
175
+	return BTF_INFO_VLEN(t->info);
176
+}
177
+
178
+static inline bool btf_type_kflag(const struct btf_type *t)
179
+{
180
+	return BTF_INFO_KFLAG(t->info);
181
+}
182
+
183
+static inline u32 btf_member_bit_offset(const struct btf_type *struct_type,
184
+					const struct btf_member *member)
185
+{
186
+	return btf_type_kflag(struct_type) ? BTF_MEMBER_BIT_OFFSET(member->offset)
187
+					   : member->offset;
188
+}
189
+
190
+static inline u32 btf_member_bitfield_size(const struct btf_type *struct_type,
191
+					   const struct btf_member *member)
192
+{
193
+	return btf_type_kflag(struct_type) ? BTF_MEMBER_BITFIELD_SIZE(member->offset)
194
+					   : 0;
195
+}
196
+
197
+static inline const struct btf_member *btf_type_member(const struct btf_type *t)
198
+{
199
+	return (const struct btf_member *)(t + 1);
200
+}
201
+
202
+static inline const struct btf_var_secinfo *btf_type_var_secinfo(
203
+		const struct btf_type *t)
204
+{
205
+	return (const struct btf_var_secinfo *)(t + 1);
206
+}
207
+
208
+#ifdef CONFIG_BPF_SYSCALL
209
+const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id);
210
+const char *btf_name_by_offset(const struct btf *btf, u32 offset);
211
+struct btf *btf_parse_vmlinux(void);
212
+struct btf *bpf_prog_get_target_btf(const struct bpf_prog *prog);
213
+#else
214
+static inline const struct btf_type *btf_type_by_id(const struct btf *btf,
215
+						    u32 type_id)
216
+{
217
+	return NULL;
218
+}
219
+static inline const char *btf_name_by_offset(const struct btf *btf,
220
+					     u32 offset)
221
+{
222
+	return NULL;
223
+}
224
+#endif
49
225
 
50
226
 #endif