1 #ifndef __NET_NETLINK_WRAPPER_H
2 #define __NET_NETLINK_WRAPPER_H 1
4 #include <linux/version.h>
5 #include_next <net/netlink.h>
7 #ifndef HAVE_NLA_NUL_STRING
8 #define NLA_NUL_STRING NLA_STRING
10 static inline int VERIFY_NUL_STRING(struct nlattr *attr)
12 return (!attr || (nla_len(attr)
13 && memchr(nla_data(attr), '\0', nla_len(attr)))
17 static inline int VERIFY_NUL_STRING(struct nlattr *attr)
21 #endif /* !HAVE_NLA_NUL_STRING */
24 #define NLA_PUT_BE16(skb, attrtype, value) \
25 NLA_PUT_TYPE(skb, __be16, attrtype, value)
26 #endif /* !NLA_PUT_BE16 */
29 #define NLA_PUT_BE32(skb, attrtype, value) \
30 NLA_PUT_TYPE(skb, __be32, attrtype, value)
31 #endif /* !NLA_PUT_BE32 */
34 #define NLA_PUT_BE64(skb, attrtype, value) \
35 NLA_PUT_TYPE(skb, __be64, attrtype, value)
36 #endif /* !NLA_PUT_BE64 */
38 #ifndef HAVE_NLA_GET_BE16
40 * nla_get_be16 - return payload of __be16 attribute
41 * @nla: __be16 netlink attribute
43 static inline __be16 nla_get_be16(const struct nlattr *nla)
45 return *(__be16 *) nla_data(nla);
47 #endif /* !HAVE_NLA_GET_BE16 */
49 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
51 * nla_get_be32 - return payload of __be32 attribute
52 * @nla: __be32 netlink attribute
54 static inline __be32 nla_get_be32(const struct nlattr *nla)
56 return *(__be32 *) nla_data(nla);
60 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
61 /* These functions' nlattr source arguments weren't "const" before 2.6.29, so
62 * cast their arguments to the non-"const" versions. Using macros for this
63 * isn't exactly a brilliant idea, but it seems less error-prone than copying
64 * the definitions of all umpteen functions. */
65 #define nla_get_u64(nla) (nla_get_u64) ((struct nlattr *) (nla))
66 #define nla_get_u32(nla) (nla_get_u32) ((struct nlattr *) (nla))
67 #define nla_get_u16(nla) (nla_get_u16) ((struct nlattr *) (nla))
68 #define nla_get_u8(nla) (nla_get_u8) ((struct nlattr *) (nla))
69 /* nla_get_be64 is handled separately below. */
70 #define nla_get_be32(nla) (nla_get_be32) ((struct nlattr *) (nla))
71 #define nla_get_be16(nla) (nla_get_be16) ((struct nlattr *) (nla))
72 #define nla_get_be8(nla) (nla_get_be8) ((struct nlattr *) (nla))
73 #define nla_get_flag(nla) (nla_get_flag) ((struct nlattr *) (nla))
74 #define nla_get_msecs(nla) (nla_get_msecs)((struct nlattr *) (nla))
75 #define nla_memcpy(dst, src, count) \
76 (nla_memcpy)(dst, (struct nlattr *)(src), count)
79 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
80 /* This function was introduced in 2.6.31, but initially it performed an
81 * unaligned access, so we replace it up to 2.6.34 where it was fixed. */
82 #define nla_get_be64 rpl_nla_get_be64
83 static inline __be64 nla_get_be64(const struct nlattr *nla)
87 /* The additional cast is necessary because */
88 nla_memcpy(&tmp, (struct nlattr *) nla, sizeof(tmp));
94 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
96 * nla_type - attribute type
97 * @nla: netlink attribute
99 static inline int nla_type(const struct nlattr *nla)
101 return nla->nla_type & NLA_TYPE_MASK;
105 /* The following nla_put_be{16,32,64} functions are not in any version of Linux
106 * (although NLA_PUT_BE{16,32,64} are), so we will probably want to add them
107 * as part of the patch series when we submit Open vSwitch upstream. */
110 * nla_put_be16 - Add a be16 netlink attribute to a socket buffer
111 * @skb: socket buffer to add attribute to
112 * @attrtype: attribute type
113 * @value: numeric value
115 static inline int nla_put_be16(struct sk_buff *skb, int attrtype, __be16 value)
117 return nla_put(skb, attrtype, sizeof(__be16), &value);
121 * nla_put_be32 - Add a be32 netlink attribute to a socket buffer
122 * @skb: socket buffer to add attribute to
123 * @attrtype: attribute type
124 * @value: numeric value
126 static inline int nla_put_be32(struct sk_buff *skb, int attrtype, __be32 value)
128 return nla_put(skb, attrtype, sizeof(__be32), &value);
132 * nla_put_64 - Add a be64 netlink attribute to a socket buffer
133 * @skb: socket buffer to add attribute to
134 * @attrtype: attribute type
135 * @value: numeric value
137 static inline int nla_put_be64(struct sk_buff *skb, int attrtype, __be64 value)
139 return nla_put(skb, attrtype, sizeof(__be64), &value);
142 #endif /* net/netlink.h */