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Diffstat (limited to 'backport-include/net/netlink.h')
| -rw-r--r-- | backport-include/net/netlink.h | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/backport-include/net/netlink.h b/backport-include/net/netlink.h new file mode 100644 index 0000000..37c899b --- /dev/null +++ b/backport-include/net/netlink.h @@ -0,0 +1,360 @@ +#ifndef __BACKPORT_NET_NETLINK_H +#define __BACKPORT_NET_NETLINK_H +#include_next <net/netlink.h> +#include <linux/version.h> +#include <linux/in6.h> + +#if LINUX_VERSION_IS_LESS(4,12,0) +#include <backport/magic.h> + +static inline int nla_validate5(const struct nlattr *head, + int len, int maxtype, + const struct nla_policy *policy, + struct netlink_ext_ack *extack) +{ + return nla_validate(head, len, maxtype, policy); +} +#define nla_validate4 nla_validate +#define nla_validate(...) \ + macro_dispatcher(nla_validate, __VA_ARGS__)(__VA_ARGS__) + +static inline int nla_parse6(struct nlattr **tb, int maxtype, + const struct nlattr *head, + int len, const struct nla_policy *policy, + struct netlink_ext_ack *extack) +{ + return nla_parse(tb, maxtype, head, len, policy); +} +#define nla_parse5(...) nla_parse(__VA_ARGS__) +#define nla_parse(...) \ + macro_dispatcher(nla_parse, __VA_ARGS__)(__VA_ARGS__) + +static inline int nlmsg_parse6(const struct nlmsghdr *nlh, int hdrlen, + struct nlattr *tb[], int maxtype, + const struct nla_policy *policy, + struct netlink_ext_ack *extack) +{ + return nlmsg_parse(nlh, hdrlen, tb, maxtype, policy); +} +#define nlmsg_parse5 nlmsg_parse +#define nlmsg_parse(...) \ + macro_dispatcher(nlmsg_parse, __VA_ARGS__)(__VA_ARGS__) + +static inline int nlmsg_validate5(const struct nlmsghdr *nlh, + int hdrlen, int maxtype, + const struct nla_policy *policy, + struct netlink_ext_ack *extack) +{ + return nlmsg_validate(nlh, hdrlen, maxtype, policy); +} +#define nlmsg_validate4 nlmsg_validate +#define nlmsg_validate(...) \ + macro_dispatcher(nlmsg_validate, __VA_ARGS__)(__VA_ARGS__) + +static inline int nla_parse_nested5(struct nlattr *tb[], int maxtype, + const struct nlattr *nla, + const struct nla_policy *policy, + struct netlink_ext_ack *extack) +{ + return nla_parse_nested(tb, maxtype, nla, policy); +} +#define nla_parse_nested4 nla_parse_nested +#define nla_parse_nested(...) \ + macro_dispatcher(nla_parse_nested, __VA_ARGS__)(__VA_ARGS__) + +static inline int nla_validate_nested4(const struct nlattr *start, int maxtype, + const struct nla_policy *policy, + struct netlink_ext_ack *extack) +{ + return nla_validate_nested(start, maxtype, policy); +} +#define nla_validate_nested3 nla_validate_nested +#define nla_validate_nested(...) \ + macro_dispatcher(nla_validate_nested, __VA_ARGS__)(__VA_ARGS__) +#endif /* LINUX_VERSION_IS_LESS(4,12,0) */ + +#if LINUX_VERSION_IS_LESS(3,7,0) +/** + * nla_put_s8 - Add a s8 netlink attribute to a socket buffer + * @skb: socket buffer to add attribute to + * @attrtype: attribute type + * @value: numeric value + */ +#define nla_put_s8 LINUX_BACKPORT(nla_put_s8) +static inline int nla_put_s8(struct sk_buff *skb, int attrtype, s8 value) +{ + return nla_put(skb, attrtype, sizeof(s8), &value); +} + +/** + * nla_put_s16 - Add a s16 netlink attribute to a socket buffer + * @skb: socket buffer to add attribute to + * @attrtype: attribute type + * @value: numeric value + */ +#define nla_put_s16 LINUX_BACKPORT(nla_put_s16) +static inline int nla_put_s16(struct sk_buff *skb, int attrtype, s16 value) +{ + return nla_put(skb, attrtype, sizeof(s16), &value); +} + +/** + * nla_put_s32 - Add a s32 netlink attribute to a socket buffer + * @skb: socket buffer to add attribute to + * @attrtype: attribute type + * @value: numeric value + */ +#define nla_put_s32 LINUX_BACKPORT(nla_put_s32) +static inline int nla_put_s32(struct sk_buff *skb, int attrtype, s32 value) +{ + return nla_put(skb, attrtype, sizeof(s32), &value); +} + +/** + * nla_get_s32 - return payload of s32 attribute + * @nla: s32 netlink attribute + */ +#define nla_get_s32 LINUX_BACKPORT(nla_get_s32) +static inline s32 nla_get_s32(const struct nlattr *nla) +{ + return *(s32 *) nla_data(nla); +} + +/** + * nla_get_s16 - return payload of s16 attribute + * @nla: s16 netlink attribute + */ +#define nla_get_s16 LINUX_BACKPORT(nla_get_s16) +static inline s16 nla_get_s16(const struct nlattr *nla) +{ + return *(s16 *) nla_data(nla); +} + +/** + * nla_get_s8 - return payload of s8 attribute + * @nla: s8 netlink attribute + */ +#define nla_get_s8 LINUX_BACKPORT(nla_get_s8) +static inline s8 nla_get_s8(const struct nlattr *nla) +{ + return *(s8 *) nla_data(nla); +} + +/** + * nla_get_s64 - return payload of s64 attribute + * @nla: s64 netlink attribute + */ +#define nla_get_s64 LINUX_BACKPORT(nla_get_s64) +static inline s64 nla_get_s64(const struct nlattr *nla) +{ + s64 tmp; + + nla_memcpy(&tmp, nla, sizeof(tmp)); + + return tmp; +} +#endif /* < 3.7.0 */ + +#if LINUX_VERSION_IS_LESS(3,5,0) +/* + * This backports: + * commit 569a8fc38367dfafd87454f27ac646c8e6b54bca + * Author: David S. Miller <davem@davemloft.net> + * Date: Thu Mar 29 23:18:53 2012 -0400 + * + * netlink: Add nla_put_be{16,32,64}() helpers. + */ + +#define nla_put_be16 LINUX_BACKPORT(nla_put_be16) +static inline int nla_put_be16(struct sk_buff *skb, int attrtype, __be16 value) +{ + return nla_put(skb, attrtype, sizeof(__be16), &value); +} + +#define nla_put_be32 LINUX_BACKPORT(nla_put_be32) +static inline int nla_put_be32(struct sk_buff *skb, int attrtype, __be32 value) +{ + return nla_put(skb, attrtype, sizeof(__be32), &value); +} + +#define nla_put_be64 LINUX_BACKPORT(nla_put_be64) +static inline int nla_put_be64(struct sk_buff *skb, int attrtype, __be64 value) +{ + return nla_put(skb, attrtype, sizeof(__be64), &value); +} +#endif /* < 3.5 */ + +#if LINUX_VERSION_IS_LESS(3,7,0) +#define NLA_S8 (NLA_BINARY + 1) +#define NLA_S16 (NLA_BINARY + 2) +#define NLA_S32 (NLA_BINARY + 3) +#define NLA_S64 (NLA_BINARY + 4) +#define __NLA_TYPE_MAX (NLA_BINARY + 5) + +#undef NLA_TYPE_MAX +#define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1) +#endif + +#if LINUX_VERSION_IS_LESS(4,1,0) +#define nla_put_in_addr LINUX_BACKPORT(nla_put_in_addr) +static inline int nla_put_in_addr(struct sk_buff *skb, int attrtype, + __be32 addr) +{ + return nla_put_be32(skb, attrtype, addr); +} + +#define nla_put_in6_addr LINUX_BACKPORT(nla_put_in6_addr) +static inline int nla_put_in6_addr(struct sk_buff *skb, int attrtype, + const struct in6_addr *addr) +{ + return nla_put(skb, attrtype, sizeof(*addr), addr); +} + +static inline __be32 nla_get_in_addr(const struct nlattr *nla) +{ + return *(__be32 *) nla_data(nla); +} + +static inline struct in6_addr nla_get_in6_addr(const struct nlattr *nla) +{ + struct in6_addr tmp; + + nla_memcpy(&tmp, nla, sizeof(tmp)); + return tmp; +} +#endif /* < 4.1 */ + +#if LINUX_VERSION_IS_LESS(4,4,0) +/** + * nla_get_le32 - return payload of __le32 attribute + * @nla: __le32 netlink attribute + */ +#define nla_get_le32 LINUX_BACKPORT(nla_get_le32) +static inline __le32 nla_get_le32(const struct nlattr *nla) +{ + return *(__le32 *) nla_data(nla); +} + +/** + * nla_get_le64 - return payload of __le64 attribute + * @nla: __le64 netlink attribute + */ +#define nla_get_le64 LINUX_BACKPORT(nla_get_le64) +static inline __le64 nla_get_le64(const struct nlattr *nla) +{ + return *(__le64 *) nla_data(nla); +} +#endif /* < 4.4 */ + +#if LINUX_VERSION_IS_LESS(4,7,0) +/** + * nla_need_padding_for_64bit - test 64-bit alignment of the next attribute + * @skb: socket buffer the message is stored in + * + * Return true if padding is needed to align the next attribute (nla_data()) to + * a 64-bit aligned area. + */ +#define nla_need_padding_for_64bit LINUX_BACKPORT(nla_need_padding_for_64bit) +static inline bool nla_need_padding_for_64bit(struct sk_buff *skb) +{ +#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS + /* The nlattr header is 4 bytes in size, that's why we test + * if the skb->data _is_ aligned. A NOP attribute, plus + * nlattr header for next attribute, will make nla_data() + * 8-byte aligned. + */ + if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8)) + return true; +#endif + return false; +} +/** + * nla_align_64bit - 64-bit align the nla_data() of next attribute + * @skb: socket buffer the message is stored in + * @padattr: attribute type for the padding + * + * Conditionally emit a padding netlink attribute in order to make + * the next attribute we emit have a 64-bit aligned nla_data() area. + * This will only be done in architectures which do not have + * HAVE_EFFICIENT_UNALIGNED_ACCESS defined. + * + * Returns zero on success or a negative error code. + */ +#define nla_align_64bit LINUX_BACKPORT(nla_align_64bit) +static inline int nla_align_64bit(struct sk_buff *skb, int padattr) +{ + if (nla_need_padding_for_64bit(skb) && + !nla_reserve(skb, padattr, 0)) + return -EMSGSIZE; + return 0; +} + +/** + * nla_total_size_64bit - total length of attribute including padding + * @payload: length of payload + */ +#define nla_total_size_64bit LINUX_BACKPORT(nla_total_size_64bit) +static inline int nla_total_size_64bit(int payload) +{ + return NLA_ALIGN(nla_attr_size(payload)) +#ifndef HAVE_EFFICIENT_UNALIGNED_ACCESS + + NLA_ALIGN(nla_attr_size(0)) +#endif + ; +} +#define __nla_reserve_64bit LINUX_BACKPORT(__nla_reserve_64bit) +struct nlattr *__nla_reserve_64bit(struct sk_buff *skb, int attrtype, + int attrlen, int padattr); +#define nla_reserve_64bit LINUX_BACKPORT(nla_reserve_64bit) +struct nlattr *nla_reserve_64bit(struct sk_buff *skb, int attrtype, + int attrlen, int padattr); +#define __nla_put_64bit LINUX_BACKPORT(__nla_put_64bit) +void __nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen, + const void *data, int padattr); +#define nla_put_64bit LINUX_BACKPORT(nla_put_64bit) +int nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen, + const void *data, int padattr); +/** + * nla_put_u64_64bit - Add a u64 netlink attribute to a skb and align it + * @skb: socket buffer to add attribute to + * @attrtype: attribute type + * @value: numeric value + * @padattr: attribute type for the padding + */ +#define nla_put_u64_64bit LINUX_BACKPORT(nla_put_u64_64bit) +static inline int nla_put_u64_64bit(struct sk_buff *skb, int attrtype, + u64 value, int padattr) +{ + return nla_put_64bit(skb, attrtype, sizeof(u64), &value, padattr); +} + + +/** + * nla_put_s64 - Add a s64 netlink attribute to a socket buffer and align it + * @skb: socket buffer to add attribute to + * @attrtype: attribute type + * @value: numeric value + * @padattr: attribute type for the padding + */ +#define nla_put_s64 LINUX_BACKPORT(nla_put_s64) +static inline int nla_put_s64(struct sk_buff *skb, int attrtype, s64 value, + int padattr) +{ + return nla_put_64bit(skb, attrtype, sizeof(s64), &value, padattr); +} +#endif /* < 4.7 */ + +#if LINUX_VERSION_IS_LESS(4,10,0) +/** + * nla_memdup - duplicate attribute memory (kmemdup) + * @src: netlink attribute to duplicate from + * @gfp: GFP mask + */ +#define nla_memdump LINUX_BACKPORT(nla_memdup) +static inline void *nla_memdup(const struct nlattr *src, gfp_t gfp) +{ + return kmemdup(nla_data(src), nla_len(src), gfp); +} +#endif /* < 4.9 */ + +#endif /* __BACKPORT_NET_NETLINK_H */ |