debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

 kernel/tools/lib/bpf/nlattr.h
..
..
@@ -1,18 +1,13 @@
1
-/* SPDX-License-Identifier: LGPL-2.1 */
1
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
2
2
 
3
3
 /*
4
4
  * NETLINK      Netlink attributes
5
5
  *
6
- *	This library is free software; you can redistribute it and/or
7
- *	modify it under the terms of the GNU Lesser General Public
8
- *	License as published by the Free Software Foundation version 2.1
9
- *	of the License.
10
- *
11
6
  * Copyright (c) 2003-2013 Thomas Graf <tgraf@suug.ch>
12
7
  */
13
8
 
14
-#ifndef __NLATTR_H
15
-#define __NLATTR_H
9
+#ifndef __LIBBPF_NLATTR_H
10
+#define __LIBBPF_NLATTR_H
16
11
 
17
12
 #include <stdint.h>
18
13
 #include <linux/netlink.h>
..
..
@@ -23,19 +18,19 @@
23
18
  * Standard attribute types to specify validation policy
24
19
  */
25
20
 enum {
26
-	NLA_UNSPEC,	/**< Unspecified type, binary data chunk */
27
-	NLA_U8,		/**< 8 bit integer */
28
-	NLA_U16,	/**< 16 bit integer */
29
-	NLA_U32,	/**< 32 bit integer */
30
-	NLA_U64,	/**< 64 bit integer */
31
-	NLA_STRING,	/**< NUL terminated character string */
32
-	NLA_FLAG,	/**< Flag */
33
-	NLA_MSECS,	/**< Micro seconds (64bit) */
34
-	NLA_NESTED,	/**< Nested attributes */
35
-	__NLA_TYPE_MAX,
21
+	LIBBPF_NLA_UNSPEC,	/**< Unspecified type, binary data chunk */
22
+	LIBBPF_NLA_U8,		/**< 8 bit integer */
23
+	LIBBPF_NLA_U16,		/**< 16 bit integer */
24
+	LIBBPF_NLA_U32,		/**< 32 bit integer */
25
+	LIBBPF_NLA_U64,		/**< 64 bit integer */
26
+	LIBBPF_NLA_STRING,	/**< NUL terminated character string */
27
+	LIBBPF_NLA_FLAG,	/**< Flag */
28
+	LIBBPF_NLA_MSECS,	/**< Micro seconds (64bit) */
29
+	LIBBPF_NLA_NESTED,	/**< Nested attributes */
30
+	__LIBBPF_NLA_TYPE_MAX,
36
31
 };
37
32
 
38
-#define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1)
33
+#define LIBBPF_NLA_TYPE_MAX (__LIBBPF_NLA_TYPE_MAX - 1)
39
34
 
40
35
 /**
41
36
  * @ingroup attr
..
..
@@ -43,8 +38,8 @@
43
38
  *
44
39
  * See section @core_doc{core_attr_parse,Attribute Parsing} for more details.
45
40
  */
46
-struct nla_policy {
47
-	/** Type of attribute or NLA_UNSPEC */
41
+struct libbpf_nla_policy {
42
+	/** Type of attribute or LIBBPF_NLA_UNSPEC */
48
43
 	uint16_t	type;
49
44
 
50
45
 	/** Minimal length of payload required */
..
..
@@ -62,11 +57,50 @@
62
57
  * @arg len	length of attribute stream
63
58
  * @arg rem	initialized to len, holds bytes currently remaining in stream
64
59
  */
65
-#define nla_for_each_attr(pos, head, len, rem) \
60
+#define libbpf_nla_for_each_attr(pos, head, len, rem) \
66
61
 	for (pos = head, rem = len; \
67
62
 	     nla_ok(pos, rem); \
68
63
 	     pos = nla_next(pos, &(rem)))
69
64
 
70
-int nla_dump_errormsg(struct nlmsghdr *nlh);
65
+/**
66
+ * libbpf_nla_data - head of payload
67
+ * @nla: netlink attribute
68
+ */
69
+static inline void *libbpf_nla_data(const struct nlattr *nla)
70
+{
71
+	return (char *) nla + NLA_HDRLEN;
72
+}
71
73
 
72
-#endif /* __NLATTR_H */
74
+static inline uint8_t libbpf_nla_getattr_u8(const struct nlattr *nla)
75
+{
76
+	return *(uint8_t *)libbpf_nla_data(nla);
77
+}
78
+
79
+static inline uint32_t libbpf_nla_getattr_u32(const struct nlattr *nla)
80
+{
81
+	return *(uint32_t *)libbpf_nla_data(nla);
82
+}
83
+
84
+static inline const char *libbpf_nla_getattr_str(const struct nlattr *nla)
85
+{
86
+	return (const char *)libbpf_nla_data(nla);
87
+}
88
+
89
+/**
90
+ * libbpf_nla_len - length of payload
91
+ * @nla: netlink attribute
92
+ */
93
+static inline int libbpf_nla_len(const struct nlattr *nla)
94
+{
95
+	return nla->nla_len - NLA_HDRLEN;
96
+}
97
+
98
+int libbpf_nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head,
99
+		     int len, struct libbpf_nla_policy *policy);
100
+int libbpf_nla_parse_nested(struct nlattr *tb[], int maxtype,
101
+			    struct nlattr *nla,
102
+			    struct libbpf_nla_policy *policy);
103
+
104
+int libbpf_nla_dump_errormsg(struct nlmsghdr *nlh);
105
+
106
+#endif /* __LIBBPF_NLATTR_H */