^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * NETLINK Netlink attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2003-2013 Thomas Graf <tgraf@suug.ch>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #ifndef __LIBBPF_NLATTR_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define __LIBBPF_NLATTR_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /* avoid multiple definition of netlink features */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define __LINUX_NETLINK_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Standard attribute types to specify validation policy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) LIBBPF_NLA_UNSPEC, /**< Unspecified type, binary data chunk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) LIBBPF_NLA_U8, /**< 8 bit integer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) LIBBPF_NLA_U16, /**< 16 bit integer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) LIBBPF_NLA_U32, /**< 32 bit integer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) LIBBPF_NLA_U64, /**< 64 bit integer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) LIBBPF_NLA_STRING, /**< NUL terminated character string */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) LIBBPF_NLA_FLAG, /**< Flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) LIBBPF_NLA_MSECS, /**< Micro seconds (64bit) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) LIBBPF_NLA_NESTED, /**< Nested attributes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) __LIBBPF_NLA_TYPE_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define LIBBPF_NLA_TYPE_MAX (__LIBBPF_NLA_TYPE_MAX - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * @ingroup attr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * Attribute validation policy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * See section @core_doc{core_attr_parse,Attribute Parsing} for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct libbpf_nla_policy {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /** Type of attribute or LIBBPF_NLA_UNSPEC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) uint16_t type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /** Minimal length of payload required */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) uint16_t minlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /** Maximal length of payload allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) uint16_t maxlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * @ingroup attr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * Iterate over a stream of attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * @arg pos loop counter, set to current attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * @arg head head of attribute stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * @arg len length of attribute stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * @arg rem initialized to len, holds bytes currently remaining in stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define libbpf_nla_for_each_attr(pos, head, len, rem) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) for (pos = head, rem = len; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) nla_ok(pos, rem); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) pos = nla_next(pos, &(rem)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * libbpf_nla_data - head of payload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * @nla: netlink attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static inline void *libbpf_nla_data(const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return (char *) nla + NLA_HDRLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static inline uint8_t libbpf_nla_getattr_u8(const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return *(uint8_t *)libbpf_nla_data(nla);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static inline uint32_t libbpf_nla_getattr_u32(const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return *(uint32_t *)libbpf_nla_data(nla);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static inline const char *libbpf_nla_getattr_str(const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return (const char *)libbpf_nla_data(nla);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * libbpf_nla_len - length of payload
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * @nla: netlink attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static inline int libbpf_nla_len(const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return nla->nla_len - NLA_HDRLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) int libbpf_nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int len, struct libbpf_nla_policy *policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int libbpf_nla_parse_nested(struct nlattr *tb[], int maxtype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct nlattr *nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct libbpf_nla_policy *policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int libbpf_nla_dump_errormsg(struct nlmsghdr *nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #endif /* __LIBBPF_NLATTR_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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