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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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SPDX-License-Identifier: GPL-2.0 */#ifndef __NET_NETLINK_H#define __NET_NETLINK_H
#include <linux/types.h>#include <linux/netlink.h>#include <linux/jiffies.h>#include <linux/in6.h>
/* ======================================================================== * Netlink Messages and Attributes Interface (As Seen On TV) * ------------------------------------------------------------------------ * Messages Interface * ------------------------------------------------------------------------ * * Message Format: * <--- nlmsg_total_size(payload) ---> * <-- nlmsg_msg_size(payload) -> * +----------+- - -+-------------+- - -+-------- - - * | nlmsghdr | Pad | Payload | Pad | nlmsghdr * +----------+- - -+-------------+- - -+-------- - - * nlmsg_data(nlh)---^ ^ * nlmsg_next(nlh)-----------------------+ * * Payload Format: * <---------------------- nlmsg_len(nlh) ---------------------> * <------ hdrlen ------> <- nlmsg_attrlen(nlh, hdrlen) -> * +----------------------+- - -+--------------------------------+ * | Family Header | Pad | Attributes | * +----------------------+- - -+--------------------------------+ * nlmsg_attrdata(nlh, hdrlen)---^ * * Data Structures: * struct nlmsghdr netlink message header * * Message Construction: * nlmsg_new() create a new netlink message * nlmsg_put() add a netlink message to an skb * nlmsg_put_answer() callback based nlmsg_put() * nlmsg_end() finalize netlink message * nlmsg_get_pos() return current position in message * nlmsg_trim() trim part of message * nlmsg_cancel() cancel message construction * nlmsg_consume() free a netlink message (expected) * nlmsg_free() free a netlink message (drop) * * Message Sending: * nlmsg_multicast() multicast message to several groups * nlmsg_unicast() unicast a message to a single socket * nlmsg_notify() send notification message * * Message Length Calculations: * nlmsg_msg_size(payload) length of message w/o padding * nlmsg_total_size(payload) length of message w/ padding * nlmsg_padlen(payload) length of padding at tail * * Message Payload Access: * nlmsg_data(nlh) head of message payload * nlmsg_len(nlh) length of message payload * nlmsg_attrdata(nlh, hdrlen) head of attributes data * nlmsg_attrlen(nlh, hdrlen) length of attributes data * * Message Parsing: * nlmsg_ok(nlh, remaining) does nlh fit into remaining bytes? * nlmsg_next(nlh, remaining) get next netlink message * nlmsg_parse() parse attributes of a message * nlmsg_find_attr() find an attribute in a message * nlmsg_for_each_msg() loop over all messages * nlmsg_validate() validate netlink message incl. attrs * nlmsg_for_each_attr() loop over all attributes * nlmsg_for_each_attr_type() loop over all attributes with the * given type * * Misc: * nlmsg_report() report back to application? * * ------------------------------------------------------------------------ * Attributes Interface * ------------------------------------------------------------------------ * * Attribute Format: * <------- nla_total_size(payload) -------> * <---- nla_attr_size(payload) -----> * +----------+- - -+- - - - - - - - - +- - -+-------- - - * | Header | Pad | Payload | Pad | Header * +----------+- - -+- - - - - - - - - +- - -+-------- - - * <- nla_len(nla) -> ^ * nla_data(nla)----^ | * nla_next(nla)-----------------------------' * * Data Structures: * struct nlattr netlink attribute header * * Attribute Construction: * nla_reserve(skb, type, len) reserve room for an attribute * nla_reserve_nohdr(skb, len) reserve room for an attribute w/o hdr * nla_put(skb, type, len, data) add attribute to skb * nla_put_nohdr(skb, len, data) add attribute w/o hdr * nla_append(skb, len, data) append data to skb * * Attribute Construction for Basic Types: * nla_put_u8(skb, type, value) add u8 attribute to skb * nla_put_u16(skb, type, value) add u16 attribute to skb * nla_put_u32(skb, type, value) add u32 attribute to skb * nla_put_u64_64bit(skb, type, * value, padattr) add u64 attribute to skb * nla_put_s8(skb, type, value) add s8 attribute to skb * nla_put_s16(skb, type, value) add s16 attribute to skb * nla_put_s32(skb, type, value) add s32 attribute to skb * nla_put_s64(skb, type, value, * padattr) add s64 attribute to skb * nla_put_string(skb, type, str) add string attribute to skb * nla_put_flag(skb, type) add flag attribute to skb * nla_put_msecs(skb, type, jiffies, * padattr) add msecs attribute to skb * nla_put_in_addr(skb, type, addr) add IPv4 address attribute to skb * nla_put_in6_addr(skb, type, addr) add IPv6 address attribute to skb * * Nested Attributes Construction: * nla_nest_start(skb, type) start a nested attribute * nla_nest_end(skb, nla) finalize a nested attribute * nla_nest_cancel(skb, nla) cancel nested attribute construction * nla_put_empty_nest(skb, type) create an empty nest * * Attribute Length Calculations: * nla_attr_size(payload) length of attribute w/o padding * nla_total_size(payload) length of attribute w/ padding * nla_padlen(payload) length of padding * * Attribute Payload Access: * nla_data(nla) head of attribute payload * nla_len(nla) length of attribute payload * * Attribute Payload Access for Basic Types: * nla_get_uint(nla) get payload for a uint attribute * nla_get_sint(nla) get payload for a sint attribute * nla_get_u8(nla) get payload for a u8 attribute * nla_get_u16(nla) get payload for a u16 attribute * nla_get_u32(nla) get payload for a u32 attribute * nla_get_u64(nla) get payload for a u64 attribute * nla_get_s8(nla) get payload for a s8 attribute * nla_get_s16(nla) get payload for a s16 attribute * nla_get_s32(nla) get payload for a s32 attribute * nla_get_s64(nla) get payload for a s64 attribute * nla_get_flag(nla) return 1 if flag is true * nla_get_msecs(nla) get payload for a msecs attribute * * The same functions also exist with _default(). * * Attribute Misc: * nla_memcpy(dest, nla, count) copy attribute into memory * nla_memcmp(nla, data, size) compare attribute with memory area * nla_strscpy(dst, nla, size) copy attribute to a sized string * nla_strcmp(nla, str) compare attribute with string * * Attribute Parsing: * nla_ok(nla, remaining) does nla fit into remaining bytes? * nla_next(nla, remaining) get next netlink attribute * nla_validate() validate a stream of attributes * nla_validate_nested() validate a stream of nested attributes * nla_find() find attribute in stream of attributes * nla_find_nested() find attribute in nested attributes * nla_parse() parse and validate stream of attrs * nla_parse_nested() parse nested attributes * nla_for_each_attr() loop over all attributes * nla_for_each_attr_type() loop over all attributes with the * given type * nla_for_each_nested() loop over the nested attributes * nla_for_each_nested_type() loop over the nested attributes with * the given type *========================================================================= */
/** * Standard attribute types to specify validation policy */enum { NLA_UNSPEC, NLA_U8, NLA_U16, NLA_U32, NLA_U64, NLA_STRING, NLA_FLAG, NLA_MSECS, NLA_NESTED, NLA_NESTED_ARRAY, NLA_NUL_STRING, NLA_BINARY, NLA_S8, NLA_S16, NLA_S32, NLA_S64, NLA_BITFIELD32, NLA_REJECT, NLA_BE16, NLA_BE32, NLA_SINT, NLA_UINT, __NLA_TYPE_MAX,};
#define NLA_TYPE_MAX (__NLA_TYPE_MAX - 1)
struct netlink_range_validation { u64 min, max;};
struct netlink_range_validation_signed { s64 min, max;};
enum nla_policy_validation { NLA_VALIDATE_NONE, NLA_VALIDATE_RANGE, NLA_VALIDATE_RANGE_WARN_TOO_LONG, NLA_VALIDATE_MIN, NLA_VALIDATE_MAX, NLA_VALIDATE_MASK, NLA_VALIDATE_RANGE_PTR, NLA_VALIDATE_FUNCTION,};
/** * struct nla_policy - attribute validation policy * @type: Type of attribute or NLA_UNSPEC * @validation_type: type of attribute validation done in addition to * type-specific validation (e.g. range, function call), see * &enum nla_policy_validation * @len: Type specific length of payload * * Policies are defined as arrays of this struct, the array must be * accessible by attribute type up to the highest identifier to be expected. * * Meaning of `len' field: * NLA_STRING Maximum length of string * NLA_NUL_STRING Maximum length of string (excluding NUL) * NLA_FLAG Unused * NLA_BINARY Maximum length of attribute payload * (but see also below with the validation type) * NLA_NESTED, * NLA_NESTED_ARRAY Length verification is done by checking len of * nested header (or empty); len field is used if * nested_policy is also used, for the max attr * number in the nested policy. * NLA_SINT, NLA_UINT, * NLA_U8, NLA_U16, * NLA_U32, NLA_U64, * NLA_S8, NLA_S16, * NLA_S32, NLA_S64, * NLA_BE16, NLA_BE32, * NLA_MSECS Leaving the length field zero will verify the * given type fits, using it verifies minimum length * just like "All other" * NLA_BITFIELD32 Unused * NLA_REJECT Unused * All other Minimum length of attribute payload * * Meaning of validation union: * NLA_BITFIELD32 This is a 32-bit bitmap/bitselector attribute and * `bitfield32_valid' is the u32 value of valid flags * NLA_REJECT This attribute is always rejected and `reject_message' * may point to a string to report as the error instead * of the generic one in extended ACK. * NLA_NESTED `nested_policy' to a nested policy to validate, must * also set `len' to the max attribute number. Use the * provided NLA_POLICY_NESTED() macro. * Note that nla_parse() will validate, but of course not * parse, the nested sub-policies. * NLA_NESTED_ARRAY `nested_policy' points to a nested policy to validate, * must also set `len' to the max attribute number. Use * the provided NLA_POLICY_NESTED_ARRAY() macro. * The difference to NLA_NESTED is the structure: * NLA_NESTED has the nested attributes directly inside * while an array has the nested attributes at another * level down and the attribute types directly in the * nesting don't matter. * NLA_UINT, * NLA_U8, * NLA_U16, * NLA_U32, * NLA_U64, * NLA_BE16, * NLA_BE32, * NLA_SINT, * NLA_S8, * NLA_S16, * NLA_S32, * NLA_S64 The `min' and `max' fields are used depending on the * validation_type field, if that is min/max/range then * the min, max or both are used (respectively) to check * the value of the integer attribute. * Note that in the interest of code simplicity and * struct size both limits are s16, so you cannot * enforce a range that doesn't fall within the range * of s16 - do that using the NLA_POLICY_FULL_RANGE() * or NLA_POLICY_FULL_RANGE_SIGNED() macros instead. * Use the NLA_POLICY_MIN(), NLA_POLICY_MAX() and * NLA_POLICY_RANGE() macros. * NLA_UINT, * NLA_U8, * NLA_U16, * NLA_U32, * NLA_U64 If the validation_type field instead is set to * NLA_VALIDATE_RANGE_PTR, `range' must be a pointer * to a struct netlink_range_validation that indicates * the min/max values. * Use NLA_POLICY_FULL_RANGE(). * NLA_SINT, * NLA_S8, * NLA_S16, * NLA_S32, * NLA_S64 If the validation_type field instead is set to * NLA_VALIDATE_RANGE_PTR, `range_signed' must be a * pointer to a struct netlink_range_validation_signed * that indicates the min/max values. * Use NLA_POLICY_FULL_RANGE_SIGNED(). * * NLA_BINARY If the validation type is like the ones for integers * above, then the min/max length (not value like for * integers) of the attribute is enforced. * * All other Unused - but note that it's a union * * Meaning of `validate' field, use via NLA_POLICY_VALIDATE_FN: * NLA_U8, NLA_U16, * NLA_U32, NLA_U64, * NLA_S8, NLA_S16, * NLA_S32, NLA_S64, * NLA_MSECS, * NLA_BINARY Validation function called for the attribute. * * All other Unused - but note that it's a union * * Example: * * static const u32 myvalidflags = 0xff231023; * * static const struct nla_policy my_policy[ATTR_MAX+1] = { * [ATTR_FOO] = { .type = NLA_U16 }, * [ATTR_BAR] = { .type = NLA_STRING, .len = BARSIZ }, * [ATTR_BAZ] = NLA_POLICY_EXACT_LEN(sizeof(struct mystruct)), * [ATTR_GOO] = NLA_POLICY_BITFIELD32(myvalidflags), * }; */struct nla_policy { u8 type; u8 validation_type; u16 len; union { /** * @strict_start_type: first attribute to validate strictly * * This entry is special, and used for the attribute at index 0 * only, and specifies special data about the policy, namely it * specifies the "boundary type" where strict length validation * starts for any attribute types >= this value, also, strict * nesting validation starts here. * * Additionally, it means that NLA_UNSPEC is actually NLA_REJECT * for any types >= this, so need to use NLA_POLICY_MIN_LEN() to * get the previous pure { .len = xyz } behaviour. The advantage * of this is that types not specified in the policy will be * rejected. * * For completely new families it should be set to 1 so that the * validation is enforced for all attributes. For existing ones * it should be set at least when new attributes are added to * the enum used by the policy, and be set to the new value that * was added to enforce strict validation from thereon. */ u16 strict_start_type;
/* private: use NLA_POLICY_*() to set */ const u32 bitfield32_valid; const u32 mask; const char *reject_message; const struct nla_policy *nested_policy; const struct netlink_range_validation *range; const struct netlink_range_validation_signed *range_signed; struct { s16 min, max; }; int (*validate)(const struct nlattr *attr, struct netlink_ext_ack *extack); };};
#define NLA_POLICY_ETH_ADDR NLA_POLICY_EXACT_LEN(ETH_ALEN)#define NLA_POLICY_ETH_ADDR_COMPAT NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN)
#define _NLA_POLICY_NESTED(maxattr, policy) \ { .type = NLA_NESTED, .nested_policy = policy, .len = maxattr }#define _NLA_POLICY_NESTED_ARRAY(maxattr, policy) \ { .type = NLA_NESTED_ARRAY, .nested_policy = policy, .len = maxattr }#define NLA_POLICY_NESTED(policy) \ _NLA_POLICY_NESTED(ARRAY_SIZE(policy) - 1, policy)#define NLA_POLICY_NESTED_ARRAY(policy) \ _NLA_POLICY_NESTED_ARRAY(ARRAY_SIZE(policy) - 1, policy)#define NLA_POLICY_BITFIELD32(valid) \ { .type = NLA_BITFIELD32, .bitfield32_valid = valid }
#define __NLA_IS_UINT_TYPE(tp) \ (tp == NLA_U8 || tp == NLA_U16 || tp == NLA_U32 || \ tp == NLA_U64 || tp == NLA_UINT || \ tp == NLA_BE16 || tp == NLA_BE32)#define __NLA_IS_SINT_TYPE(tp) \ (tp == NLA_S8 || tp == NLA_S16 || tp == NLA_S32 || tp == NLA_S64 || \ tp == NLA_SINT)
#define __NLA_ENSURE(condition) BUILD_BUG_ON_ZERO(!(condition))#define NLA_ENSURE_UINT_TYPE(tp) \ (__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp)) + tp)#define NLA_ENSURE_UINT_OR_BINARY_TYPE(tp) \ (__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp) || \ tp == NLA_MSECS || \ tp == NLA_BINARY) + tp)#define NLA_ENSURE_SINT_TYPE(tp) \ (__NLA_ENSURE(__NLA_IS_SINT_TYPE(tp)) + tp)#define NLA_ENSURE_INT_OR_BINARY_TYPE(tp) \ (__NLA_ENSURE(__NLA_IS_UINT_TYPE(tp) || \ __NLA_IS_SINT_TYPE(tp) || \ tp == NLA_MSECS || \ tp == NLA_BINARY) + tp)#define NLA_ENSURE_NO_VALIDATION_PTR(tp) \ (__NLA_ENSURE(tp != NLA_BITFIELD32 && \ tp != NLA_REJECT && \ tp != NLA_NESTED && \ tp != NLA_NESTED_ARRAY) + tp)
#define NLA_POLICY_RANGE(tp, _min, _max) { \ .type = NLA_ENSURE_INT_OR_BINARY_TYPE(tp), \ .validation_type = NLA_VALIDATE_RANGE, \ .min = _min, \ .max = _max \}
#define NLA_POLICY_FULL_RANGE(tp, _range) { \ .type = NLA_ENSURE_UINT_OR_BINARY_TYPE(tp), \ .validation_type = NLA_VALIDATE_RANGE_PTR, \ .range = _range, \}
#define NLA_POLICY_FULL_RANGE_SIGNED(tp, _range) { \ .type = NLA_ENSURE_SINT_TYPE(tp), \ .validation_type = NLA_VALIDATE_RANGE_PTR, \ .range_signed = _range, \}
#define NLA_POLICY_MIN(tp, _min) { \ .type = NLA_ENSURE_INT_OR_BINARY_TYPE(tp), \ .validation_type = NLA_VALIDATE_MIN, \ .min = _min, \}
#define NLA_POLICY_MAX(tp, _max) { \ .type = NLA_ENSURE_INT_OR_BINARY_TYPE(tp), \ .validation_type = NLA_VALIDATE_MAX, \ .max = _max, \}
#define NLA_POLICY_MASK(tp, _mask) { \ .type = NLA_ENSURE_UINT_TYPE(tp), \ .validation_type = NLA_VALIDATE_MASK, \ .mask = _mask, \}
#define NLA_POLICY_VALIDATE_FN(tp, fn, ...) { \ .type = NLA_ENSURE_NO_VALIDATION_PTR(tp), \ .validation_type = NLA_VALIDATE_FUNCTION, \ .validate = fn, \ .len = __VA_ARGS__ + 0, \}
#define NLA_POLICY_EXACT_LEN(_len) NLA_POLICY_RANGE(NLA_BINARY, _len, _len)#define NLA_POLICY_EXACT_LEN_WARN(_len) { \ .type = NLA_BINARY, \ .validation_type = NLA_VALIDATE_RANGE_WARN_TOO_LONG, \ .min = _len, \ .max = _len \}#define NLA_POLICY_MIN_LEN(_len) NLA_POLICY_MIN(NLA_BINARY, _len)#define NLA_POLICY_MAX_LEN(_len) NLA_POLICY_MAX(NLA_BINARY, _len)
/** * struct nl_info - netlink source information * @nlh: Netlink message header of original request * @nl_net: Network namespace * @portid: Netlink PORTID of requesting application * @skip_notify: Skip netlink notifications to user space * @skip_notify_kernel: Skip selected in-kernel notifications */struct nl_info { struct nlmsghdr *nlh; struct net *nl_net; u32 portid; u8 skip_notify:1, skip_notify_kernel:1;};
/** * enum netlink_validation - netlink message/attribute validation levels * @NL_VALIDATE_LIBERAL: Old-style "be liberal" validation, not caring about * extra data at the end of the message, attributes being longer than * they should be, or unknown attributes being present. * @NL_VALIDATE_TRAILING: Reject junk data encountered after attribute parsing. * @NL_VALIDATE_MAXTYPE: Reject attributes > max type; Together with _TRAILING * this is equivalent to the old nla_parse_strict()/nlmsg_parse_strict(). * @NL_VALIDATE_UNSPEC: Reject attributes with NLA_UNSPEC in the policy. * This can safely be set by the kernel when the given policy has no * NLA_UNSPEC anymore, and can thus be used to ensure policy entries * are enforced going forward. * @NL_VALIDATE_STRICT_ATTRS: strict attribute policy parsing (e.g. * U8, U16, U32 must have exact size, etc.) * @NL_VALIDATE_NESTED: Check that NLA_F_NESTED is set for NLA_NESTED(_ARRAY) * and unset for other policies. */enum netlink_validation { NL_VALIDATE_LIBERAL = 0, NL_VALIDATE_TRAILING = BIT(0), NL_VALIDATE_MAXTYPE = BIT(1), NL_VALIDATE_UNSPEC = BIT(2), NL_VALIDATE_STRICT_ATTRS = BIT(3), NL_VALIDATE_NESTED = BIT(4),};
#define NL_VALIDATE_DEPRECATED_STRICT (NL_VALIDATE_TRAILING |\ NL_VALIDATE_MAXTYPE)#define NL_VALIDATE_STRICT (NL_VALIDATE_TRAILING |\ NL_VALIDATE_MAXTYPE |\ NL_VALIDATE_UNSPEC |\ NL_VALIDATE_STRICT_ATTRS |\ NL_VALIDATE_NESTED)
int netlink_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *, struct nlmsghdr *, struct netlink_ext_ack *));int nlmsg_notify(struct sock *sk, struct sk_buff *skb, u32 portid, unsigned int group, int report, gfp_t flags);
int __nla_validate(const struct nlattr *head, int len, int maxtype, const struct nla_policy *policy, unsigned int validate, struct netlink_ext_ack *extack);int __nla_parse(struct nlattr **tb, int maxtype, const struct nlattr *head, int len, const struct nla_policy *policy, unsigned int validate, struct netlink_ext_ack *extack);int nla_policy_len(const struct nla_policy *, int);struct nlattr *nla_find(const struct nlattr *head, int len, int attrtype);ssize_t nla_strscpy(char *dst, const struct nlattr *nla, size_t dstsize);char *nla_strdup(const struct nlattr *nla, gfp_t flags);int nla_memcpy(void *dest, const struct nlattr *src, int count);int nla_memcmp(const struct nlattr *nla, const void *data, size_t size);int nla_strcmp(const struct nlattr *nla, const char *str);struct nlattr *__nla_reserve(struct sk_buff *skb, int attrtype, int attrlen);struct nlattr *__nla_reserve_64bit(struct sk_buff *skb, int attrtype, int attrlen, int padattr);void *__nla_reserve_nohdr(struct sk_buff *skb, int attrlen);struct nlattr *nla_reserve(struct sk_buff *skb, int attrtype, int attrlen);struct nlattr *nla_reserve_64bit(struct sk_buff *skb, int attrtype, int attrlen, int padattr);void *nla_reserve_nohdr(struct sk_buff *skb, int attrlen);void __nla_put(struct sk_buff *skb, int attrtype, int attrlen, const void *data);void __nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen, const void *data, int padattr);void __nla_put_nohdr(struct sk_buff *skb, int attrlen, const void *data);int nla_put(struct sk_buff *skb, int attrtype, int attrlen, const void *data);int nla_put_64bit(struct sk_buff *skb, int attrtype, int attrlen, const void *data, int padattr);int nla_put_nohdr(struct sk_buff *skb, int attrlen, const void *data);int nla_append(struct sk_buff *skb, int attrlen, const void *data);
/************************************************************************** * Netlink Messages **************************************************************************/
/** * nlmsg_msg_size - length of netlink message not including padding * @payload: length of message payload */static inline int nlmsg_msg_size(int payload){ return NLMSG_HDRLEN + payload;}
/** * nlmsg_total_size - length of netlink message including padding * @payload: length of message payload */static inline int nlmsg_total_size(int payload){ return NLMSG_ALIGN(nlmsg_msg_size(payload));}
/** * nlmsg_padlen - length of padding at the message's tail * @payload: length of message payload */static inline int nlmsg_padlen(int payload){ return nlmsg_total_size(payload) - nlmsg_msg_size(payload);}
/** * nlmsg_data - head of message payload * @nlh: netlink message header */static inline void *nlmsg_data(const struct nlmsghdr *nlh){ return (unsigned char *) nlh + NLMSG_HDRLEN;}
/** * nlmsg_len - length of message payload * @nlh: netlink message header */static inline int nlmsg_len(const struct nlmsghdr *nlh){ return nlh->nlmsg_len - NLMSG_HDRLEN;}
/** * nlmsg_payload - message payload if the data fits in the len * @nlh: netlink message header * @len: struct length * * Returns: The netlink message payload/data if the length is sufficient, * otherwise NULL. */static inline void *nlmsg_payload(const struct nlmsghdr *nlh, size_t len){ if (nlh->nlmsg_len < nlmsg_msg_size(len)) return NULL;
return nlmsg_data(nlh);}
/** * nlmsg_attrdata - head of attributes data * @nlh: netlink message header * @hdrlen: length of family specific header */static inline struct nlattr *nlmsg_attrdata(const struct nlmsghdr *nlh, int hdrlen){ unsigned char *data = nlmsg_data(nlh); return (struct nlattr *) (data + NLMSG_ALIGN(hdrlen));}
/** * nlmsg_attrlen - length of attributes data * @nlh: netlink message header * @hdrlen: length of family specific header */static inline int nlmsg_attrlen(const struct nlmsghdr *nlh, int hdrlen){ return nlmsg_len(nlh) - NLMSG_ALIGN(hdrlen);}
/** * nlmsg_ok - check if the netlink message fits into the remaining bytes * @nlh: netlink message header * @remaining: number of bytes remaining in message stream */static inline int nlmsg_ok(const struct nlmsghdr *nlh, int remaining){ return (remaining >= (int) sizeof(struct nlmsghdr) && nlh->nlmsg_len >= sizeof(struct nlmsghdr) && nlh->nlmsg_len <= remaining);}
/** * nlmsg_next - next netlink message in message stream * @nlh: netlink message header * @remaining: number of bytes remaining in message stream * * Returns: the next netlink message in the message stream and * decrements remaining by the size of the current message. */static inline struct nlmsghdr *nlmsg_next(const struct nlmsghdr *nlh, int *remaining){ int totlen = NLMSG_ALIGN(nlh->nlmsg_len);
*remaining -= totlen;
return (struct nlmsghdr *) ((unsigned char *) nlh + totlen);}
/** * nla_parse - Parse a stream of attributes into a tb buffer * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @head: head of attribute stream * @len: length of attribute stream * @policy: validation policy * @extack: extended ACK pointer * * Parses a stream of attributes and stores a pointer to each attribute in * the tb array accessible via the attribute type. Attributes with a type * exceeding maxtype will be rejected, policy must be specified, attributes * will be validated in the strictest way possible. * * Returns: 0 on success or a negative error code. */static inline int nla_parse(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, NL_VALIDATE_STRICT, extack);}
/** * nla_parse_deprecated - Parse a stream of attributes into a tb buffer * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @head: head of attribute stream * @len: length of attribute stream * @policy: validation policy * @extack: extended ACK pointer * * Parses a stream of attributes and stores a pointer to each attribute in * the tb array accessible via the attribute type. Attributes with a type * exceeding maxtype will be ignored and attributes from the policy are not * always strictly validated (only for new attributes). * * Returns: 0 on success or a negative error code. */static inline int nla_parse_deprecated(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, NL_VALIDATE_LIBERAL, extack);}
/** * nla_parse_deprecated_strict - Parse a stream of attributes into a tb buffer * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @head: head of attribute stream * @len: length of attribute stream * @policy: validation policy * @extack: extended ACK pointer * * Parses a stream of attributes and stores a pointer to each attribute in * the tb array accessible via the attribute type. Attributes with a type * exceeding maxtype will be rejected as well as trailing data, but the * policy is not completely strictly validated (only for new attributes). * * Returns: 0 on success or a negative error code. */static inline int nla_parse_deprecated_strict(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, NL_VALIDATE_DEPRECATED_STRICT, extack);}
/** * __nlmsg_parse - parse attributes of a netlink message * @nlh: netlink message header * @hdrlen: length of family specific header * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @policy: validation policy * @validate: validation strictness * @extack: extended ACK report struct * * See nla_parse() */static inline int __nlmsg_parse(const struct nlmsghdr *nlh, int hdrlen, struct nlattr *tb[], int maxtype, const struct nla_policy *policy, unsigned int validate, struct netlink_ext_ack *extack){ if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) { NL_SET_ERR_MSG(extack, "Invalid header length"); return -EINVAL; }
return __nla_parse(tb, maxtype, nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen), policy, validate, extack);}
/** * nlmsg_parse - parse attributes of a netlink message * @nlh: netlink message header * @hdrlen: length of family specific header * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @policy: validation policy * @extack: extended ACK report struct * * See nla_parse() */static inline int nlmsg_parse(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, NL_VALIDATE_STRICT, extack);}
/** * nlmsg_parse_deprecated - parse attributes of a netlink message * @nlh: netlink message header * @hdrlen: length of family specific header * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @policy: validation policy * @extack: extended ACK report struct * * See nla_parse_deprecated() */static inline int nlmsg_parse_deprecated(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, NL_VALIDATE_LIBERAL, extack);}
/** * nlmsg_parse_deprecated_strict - parse attributes of a netlink message * @nlh: netlink message header * @hdrlen: length of family specific header * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @policy: validation policy * @extack: extended ACK report struct * * See nla_parse_deprecated_strict() */static inline intnlmsg_parse_deprecated_strict(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, NL_VALIDATE_DEPRECATED_STRICT, extack);}
/** * nlmsg_find_attr - find a specific attribute in a netlink message * @nlh: netlink message header * @hdrlen: length of family specific header * @attrtype: type of attribute to look for * * Returns: the first attribute which matches the specified type. */static inline struct nlattr *nlmsg_find_attr(const struct nlmsghdr *nlh, int hdrlen, int attrtype){ return nla_find(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen), attrtype);}
/** * nla_validate_deprecated - Validate a stream of attributes * @head: head of attribute stream * @len: length of attribute stream * @maxtype: maximum attribute type to be expected * @policy: validation policy * @extack: extended ACK report struct * * Validates all attributes in the specified attribute stream against the * specified policy. Validation is done in liberal mode. * See documentation of struct nla_policy for more details. * * Returns: 0 on success or a negative error code. */static inline int nla_validate_deprecated(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, NL_VALIDATE_LIBERAL, extack);}
/** * nla_validate - Validate a stream of attributes * @head: head of attribute stream * @len: length of attribute stream * @maxtype: maximum attribute type to be expected * @policy: validation policy * @extack: extended ACK report struct * * Validates all attributes in the specified attribute stream against the * specified policy. Validation is done in strict mode. * See documentation of struct nla_policy for more details. * * Returns: 0 on success or a negative error code. */static inline int nla_validate(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, NL_VALIDATE_STRICT, extack);}
/** * nlmsg_validate_deprecated - validate a netlink message including attributes * @nlh: netlinket message header * @hdrlen: length of family specific header * @maxtype: maximum attribute type to be expected * @policy: validation policy * @extack: extended ACK report struct */static inline int nlmsg_validate_deprecated(const struct nlmsghdr *nlh, int hdrlen, int maxtype, const struct nla_policy *policy, struct netlink_ext_ack *extack){ if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) return -EINVAL;
return __nla_validate(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen), maxtype, policy, NL_VALIDATE_LIBERAL, extack);}
/** * nlmsg_report - need to report back to application? * @nlh: netlink message header * * Returns: 1 if a report back to the application is requested. */static inline int nlmsg_report(const struct nlmsghdr *nlh){ return nlh ? !!(nlh->nlmsg_flags & NLM_F_ECHO) : 0;}
/** * nlmsg_seq - return the seq number of netlink message * @nlh: netlink message header * * Returns: 0 if netlink message is NULL */static inline u32 nlmsg_seq(const struct nlmsghdr *nlh){ return nlh ? nlh->nlmsg_seq : 0;}
/** * nlmsg_for_each_attr - iterate over a stream of attributes * @pos: loop counter, set to current attribute * @nlh: netlink message header * @hdrlen: length of family specific header * @rem: initialized to len, holds bytes currently remaining in stream */#define nlmsg_for_each_attr(pos, nlh, hdrlen, rem) \ nla_for_each_attr(pos, nlmsg_attrdata(nlh, hdrlen), \ nlmsg_attrlen(nlh, hdrlen), rem)
/** * nlmsg_for_each_attr_type - iterate over a stream of attributes * @pos: loop counter, set to the current attribute * @type: required attribute type for @pos * @nlh: netlink message header * @hdrlen: length of the family specific header * @rem: initialized to len, holds bytes currently remaining in stream */#define nlmsg_for_each_attr_type(pos, type, nlh, hdrlen, rem) \ nlmsg_for_each_attr(pos, nlh, hdrlen, rem) \ if (nla_type(pos) == type)
/** * nlmsg_put - Add a new netlink message to an skb * @skb: socket buffer to store message in * @portid: netlink PORTID of requesting application * @seq: sequence number of message * @type: message type * @payload: length of message payload * @flags: message flags * * Returns: NULL if the tailroom of the skb is insufficient to store * the message header and payload. */static inline struct nlmsghdr *nlmsg_put(struct sk_buff *skb, u32 portid, u32 seq, int type, int payload, int flags){ if (unlikely(skb_tailroom(skb) < nlmsg_total_size(payload))) return NULL;
return __nlmsg_put(skb, portid, seq, type, payload, flags);}
/** * nlmsg_append - Add more data to a nlmsg in a skb * @skb: socket buffer to store message in * @size: length of message payload * * Append data to an existing nlmsg, used when constructing a message * with multiple fixed-format headers (which is rare). * Returns: NULL if the tailroom of the skb is insufficient to store * the extra payload. */static inline void *nlmsg_append(struct sk_buff *skb, u32 size){ if (unlikely(skb_tailroom(skb) < NLMSG_ALIGN(size))) return NULL;
if (NLMSG_ALIGN(size) - size) memset(skb_tail_pointer(skb) + size, 0, NLMSG_ALIGN(size) - size); return __skb_put(skb, NLMSG_ALIGN(size));}
/** * nlmsg_put_answer - Add a new callback based netlink message to an skb * @skb: socket buffer to store message in * @cb: netlink callback * @type: message type * @payload: length of message payload * @flags: message flags * * Returns: NULL if the tailroom of the skb is insufficient to store * the message header and payload. */static inline struct nlmsghdr *nlmsg_put_answer(struct sk_buff *skb, struct netlink_callback *cb, int type, int payload, int flags){ return nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, type, payload, flags);}
/** * nlmsg_new - Allocate a new netlink message * @payload: size of the message payload * @flags: the type of memory to allocate. * * Use NLMSG_DEFAULT_SIZE if the size of the payload isn't known * and a good default is needed. */static inline struct sk_buff *nlmsg_new(size_t payload, gfp_t flags){ return alloc_skb(nlmsg_total_size(payload), flags);}
/** * nlmsg_new_large - Allocate a new netlink message with non-contiguous * physical memory * @payload: size of the message payload * * The allocated skb is unable to have frag page for shinfo->frags*, * as the NULL setting for skb->head in netlink_skb_destructor() will * bypass most of the handling in skb_release_data() */static inline struct sk_buff *nlmsg_new_large(size_t payload){ return netlink_alloc_large_skb(nlmsg_total_size(payload), 0);}
/** * nlmsg_end - Finalize a netlink message * @skb: socket buffer the message is stored in * @nlh: netlink message header * * Corrects the netlink message header to include the appended * attributes. Only necessary if attributes have been added to * the message. */static inline void nlmsg_end(struct sk_buff *skb, struct nlmsghdr *nlh){ nlh->nlmsg_len = skb_tail_pointer(skb) - (unsigned char *)nlh;}
/** * nlmsg_get_pos - return current position in netlink message * @skb: socket buffer the message is stored in * * Returns: a pointer to the current tail of the message. */static inline void *nlmsg_get_pos(struct sk_buff *skb){ return skb_tail_pointer(skb);}
/** * nlmsg_trim - Trim message to a mark * @skb: socket buffer the message is stored in * @mark: mark to trim to * * Trims the message to the provided mark. */static inline void nlmsg_trim(struct sk_buff *skb, const void *mark){ if (mark) { WARN_ON((unsigned char *) mark < skb->data); skb_trim(skb, (unsigned char *) mark - skb->data); }}
/** * nlmsg_cancel - Cancel construction of a netlink message * @skb: socket buffer the message is stored in * @nlh: netlink message header * * Removes the complete netlink message including all * attributes from the socket buffer again. */static inline void nlmsg_cancel(struct sk_buff *skb, struct nlmsghdr *nlh){ nlmsg_trim(skb, nlh);}
/** * nlmsg_free - drop a netlink message * @skb: socket buffer of netlink message */static inline void nlmsg_free(struct sk_buff *skb){ kfree_skb(skb);}
/** * nlmsg_consume - free a netlink message * @skb: socket buffer of netlink message */static inline void nlmsg_consume(struct sk_buff *skb){ consume_skb(skb);}
/** * nlmsg_multicast_filtered - multicast a netlink message with filter function * @sk: netlink socket to spread messages to * @skb: netlink message as socket buffer * @portid: own netlink portid to avoid sending to yourself * @group: multicast group id * @flags: allocation flags * @filter: filter function * @filter_data: filter function private data * * Return: 0 on success, negative error code for failure. */static inline int nlmsg_multicast_filtered(struct sock *sk, struct sk_buff *skb, u32 portid, unsigned int group, gfp_t flags, netlink_filter_fn filter, void *filter_data){ int err;
NETLINK_CB(skb).dst_group = group;
err = netlink_broadcast_filtered(sk, skb, portid, group, flags, filter, filter_data); if (err > 0) err = 0;
return err;}
/** * nlmsg_multicast - multicast a netlink message * @sk: netlink socket to spread messages to * @skb: netlink message as socket buffer * @portid: own netlink portid to avoid sending to yourself * @group: multicast group id * @flags: allocation flags */static inline int nlmsg_multicast(struct sock *sk, struct sk_buff *skb, u32 portid, unsigned int group, gfp_t flags){ return nlmsg_multicast_filtered(sk, skb, portid, group, flags, NULL, NULL);}
/** * nlmsg_unicast - unicast a netlink message * @sk: netlink socket to spread message to * @skb: netlink message as socket buffer * @portid: netlink portid of the destination socket */static inline int nlmsg_unicast(struct sock *sk, struct sk_buff *skb, u32 portid){ int err;
err = netlink_unicast(sk, skb, portid, MSG_DONTWAIT); if (err > 0) err = 0;
return err;}
/** * nlmsg_for_each_msg - iterate over a stream of messages * @pos: loop counter, set to current message * @head: head of message stream * @len: length of message stream * @rem: initialized to len, holds bytes currently remaining in stream */#define nlmsg_for_each_msg(pos, head, len, rem) \ for (pos = head, rem = len; \ nlmsg_ok(pos, rem); \ pos = nlmsg_next(pos, &(rem)))
/** * nl_dump_check_consistent - check if sequence is consistent and advertise if not * @cb: netlink callback structure that stores the sequence number * @nlh: netlink message header to write the flag to * * This function checks if the sequence (generation) number changed during dump * and if it did, advertises it in the netlink message header. * * The correct way to use it is to set cb->seq to the generation counter when * all locks for dumping have been acquired, and then call this function for * each message that is generated. * * Note that due to initialisation concerns, 0 is an invalid sequence number * and must not be used by code that uses this functionality. */static inline voidnl_dump_check_consistent(struct netlink_callback *cb, struct nlmsghdr *nlh){ if (cb->prev_seq && cb->seq != cb->prev_seq) nlh->nlmsg_flags |= NLM_F_DUMP_INTR; cb->prev_seq = cb->seq;}
/************************************************************************** * Netlink Attributes **************************************************************************/
/** * nla_attr_size - length of attribute not including padding * @payload: length of payload */static inline int nla_attr_size(int payload){ return NLA_HDRLEN + payload;}
/** * nla_total_size - total length of attribute including padding * @payload: length of payload */static inline int nla_total_size(int payload){ return NLA_ALIGN(nla_attr_size(payload));}
/** * nla_padlen - length of padding at the tail of attribute * @payload: length of payload */static inline int nla_padlen(int payload){ return nla_total_size(payload) - nla_attr_size(payload);}
/** * nla_type - attribute type * @nla: netlink attribute */static inline int nla_type(const struct nlattr *nla){ return nla->nla_type & NLA_TYPE_MASK;}
/** * nla_data - head of payload * @nla: netlink attribute */static inline void *nla_data(const struct nlattr *nla){ return (char *) nla + NLA_HDRLEN;}
/** * nla_len - length of payload * @nla: netlink attribute */static inline u16 nla_len(const struct nlattr *nla){ return nla->nla_len - NLA_HDRLEN;}
/** * nla_ok - check if the netlink attribute fits into the remaining bytes * @nla: netlink attribute * @remaining: number of bytes remaining in attribute stream */static inline int nla_ok(const struct nlattr *nla, int remaining){ return remaining >= (int) sizeof(*nla) && nla->nla_len >= sizeof(*nla) && nla->nla_len <= remaining;}
/** * nla_next - next netlink attribute in attribute stream * @nla: netlink attribute * @remaining: number of bytes remaining in attribute stream * * Returns: the next netlink attribute in the attribute stream and * decrements remaining by the size of the current attribute. */static inline struct nlattr *nla_next(const struct nlattr *nla, int *remaining){ unsigned int totlen = NLA_ALIGN(nla->nla_len);
*remaining -= totlen; return (struct nlattr *) ((char *) nla + totlen);}
/** * nla_find_nested - find attribute in a set of nested attributes * @nla: attribute containing the nested attributes * @attrtype: type of attribute to look for * * Returns: the first attribute which matches the specified type. */static inline struct nlattr *nla_find_nested(const struct nlattr *nla, int attrtype){ return nla_find(nla_data(nla), nla_len(nla), attrtype);}
/** * nla_parse_nested - parse nested attributes * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @nla: attribute containing the nested attributes * @policy: validation policy * @extack: extended ACK report struct * * See nla_parse() */static inline int nla_parse_nested(struct nlattr *tb[], int maxtype, const struct nlattr *nla, const struct nla_policy *policy, struct netlink_ext_ack *extack){ if (!(nla->nla_type & NLA_F_NESTED)) { NL_SET_ERR_MSG_ATTR(extack, nla, "NLA_F_NESTED is missing"); return -EINVAL; }
return __nla_parse(tb, maxtype, nla_data(nla), nla_len(nla), policy, NL_VALIDATE_STRICT, extack);}
/** * nla_parse_nested_deprecated - parse nested attributes * @tb: destination array with maxtype+1 elements * @maxtype: maximum attribute type to be expected * @nla: attribute containing the nested attributes * @policy: validation policy * @extack: extended ACK report struct * * See nla_parse_deprecated() */static inline int nla_parse_nested_deprecated(struct nlattr *tb[], int maxtype, const struct nlattr *nla, const struct nla_policy *policy, struct netlink_ext_ack *extack){ return __nla_parse(tb, maxtype, nla_data(nla), nla_len(nla), policy, NL_VALIDATE_LIBERAL, extack);}
/** * nla_put_u8 - Add a u8 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_u8(struct sk_buff *skb, int attrtype, u8 value){ /* temporary variables to work around GCC PR81715 with asan-stack=1 */ u8 tmp = value;
return nla_put(skb, attrtype, sizeof(u8), &tmp);}
/** * nla_put_u16 - Add a u16 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_u16(struct sk_buff *skb, int attrtype, u16 value){ u16 tmp = value;
return nla_put(skb, attrtype, sizeof(u16), &tmp);}
/** * nla_put_be16 - Add a __be16 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_be16(struct sk_buff *skb, int attrtype, __be16 value){ __be16 tmp = value;
return nla_put(skb, attrtype, sizeof(__be16), &tmp);}
/** * nla_put_net16 - Add 16-bit network byte order netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_net16(struct sk_buff *skb, int attrtype, __be16 value){ __be16 tmp = value;
return nla_put_be16(skb, attrtype | NLA_F_NET_BYTEORDER, tmp);}
/** * nla_put_le16 - Add a __le16 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_le16(struct sk_buff *skb, int attrtype, __le16 value){ __le16 tmp = value;
return nla_put(skb, attrtype, sizeof(__le16), &tmp);}
/** * nla_put_u32 - Add a u32 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_u32(struct sk_buff *skb, int attrtype, u32 value){ u32 tmp = value;
return nla_put(skb, attrtype, sizeof(u32), &tmp);}
/** * nla_put_uint - Add a variable-size unsigned int to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_uint(struct sk_buff *skb, int attrtype, u64 value){ u64 tmp64 = value; u32 tmp32 = value;
if (tmp64 == tmp32) return nla_put_u32(skb, attrtype, tmp32); return nla_put(skb, attrtype, sizeof(u64), &tmp64);}
/** * nla_put_be32 - Add a __be32 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_be32(struct sk_buff *skb, int attrtype, __be32 value){ __be32 tmp = value;
return nla_put(skb, attrtype, sizeof(__be32), &tmp);}
/** * nla_put_net32 - Add 32-bit network byte order netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_net32(struct sk_buff *skb, int attrtype, __be32 value){ __be32 tmp = value;
return nla_put_be32(skb, attrtype | NLA_F_NET_BYTEORDER, tmp);}
/** * nla_put_le32 - Add a __le32 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_le32(struct sk_buff *skb, int attrtype, __le32 value){ __le32 tmp = value;
return nla_put(skb, attrtype, sizeof(__le32), &tmp);}
/** * 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 */static inline int nla_put_u64_64bit(struct sk_buff *skb, int attrtype, u64 value, int padattr){ u64 tmp = value;
return nla_put_64bit(skb, attrtype, sizeof(u64), &tmp, padattr);}
/** * nla_put_be64 - Add a __be64 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 */static inline int nla_put_be64(struct sk_buff *skb, int attrtype, __be64 value, int padattr){ __be64 tmp = value;
return nla_put_64bit(skb, attrtype, sizeof(__be64), &tmp, padattr);}
/** * nla_put_net64 - Add 64-bit network byte order nlattr 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 */static inline int nla_put_net64(struct sk_buff *skb, int attrtype, __be64 value, int padattr){ __be64 tmp = value;
return nla_put_be64(skb, attrtype | NLA_F_NET_BYTEORDER, tmp, padattr);}
/** * nla_put_le64 - Add a __le64 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 */static inline int nla_put_le64(struct sk_buff *skb, int attrtype, __le64 value, int padattr){ __le64 tmp = value;
return nla_put_64bit(skb, attrtype, sizeof(__le64), &tmp, padattr);}
/** * 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 */static inline int nla_put_s8(struct sk_buff *skb, int attrtype, s8 value){ s8 tmp = value;
return nla_put(skb, attrtype, sizeof(s8), &tmp);}
/** * 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 */static inline int nla_put_s16(struct sk_buff *skb, int attrtype, s16 value){ s16 tmp = value;
return nla_put(skb, attrtype, sizeof(s16), &tmp);}
/** * 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 */static inline int nla_put_s32(struct sk_buff *skb, int attrtype, s32 value){ s32 tmp = value;
return nla_put(skb, attrtype, sizeof(s32), &tmp);}
/** * 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 */static inline int nla_put_s64(struct sk_buff *skb, int attrtype, s64 value, int padattr){ s64 tmp = value;
return nla_put_64bit(skb, attrtype, sizeof(s64), &tmp, padattr);}
/** * nla_put_sint - Add a variable-size signed int to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: numeric value */static inline int nla_put_sint(struct sk_buff *skb, int attrtype, s64 value){ s64 tmp64 = value; s32 tmp32 = value;
if (tmp64 == tmp32) return nla_put_s32(skb, attrtype, tmp32); return nla_put(skb, attrtype, sizeof(s64), &tmp64);}
/** * nla_put_string - Add a string netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @str: NUL terminated string */static inline int nla_put_string(struct sk_buff *skb, int attrtype, const char *str){ return nla_put(skb, attrtype, strlen(str) + 1, str);}
/** * nla_put_flag - Add a flag netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type */static inline int nla_put_flag(struct sk_buff *skb, int attrtype){ return nla_put(skb, attrtype, 0, NULL);}
/** * nla_put_msecs - Add a msecs netlink attribute to a skb and align it * @skb: socket buffer to add attribute to * @attrtype: attribute type * @njiffies: number of jiffies to convert to msecs * @padattr: attribute type for the padding */static inline int nla_put_msecs(struct sk_buff *skb, int attrtype, unsigned long njiffies, int padattr){ u64 tmp = jiffies_to_msecs(njiffies);
return nla_put_64bit(skb, attrtype, sizeof(u64), &tmp, padattr);}
/** * nla_put_in_addr - Add an IPv4 address netlink attribute to a socket * buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @addr: IPv4 address */static inline int nla_put_in_addr(struct sk_buff *skb, int attrtype, __be32 addr){ __be32 tmp = addr;
return nla_put_be32(skb, attrtype, tmp);}
/** * nla_put_in6_addr - Add an IPv6 address netlink attribute to a socket * buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @addr: IPv6 address */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);}
/** * nla_put_bitfield32 - Add a bitfield32 netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type * @value: value carrying bits * @selector: selector of valid bits */static inline int nla_put_bitfield32(struct sk_buff *skb, int attrtype, __u32 value, __u32 selector){ struct nla_bitfield32 tmp = { value, selector, };
return nla_put(skb, attrtype, sizeof(tmp), &tmp);}
/** * nla_get_u32 - return payload of u32 attribute * @nla: u32 netlink attribute */static inline u32 nla_get_u32(const struct nlattr *nla){ return *(u32 *) nla_data(nla);}
/** * nla_get_u32_default - return payload of u32 attribute or default * @nla: u32 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline u32 nla_get_u32_default(const struct nlattr *nla, u32 defvalue){ if (!nla) return defvalue; return nla_get_u32(nla);}
/** * nla_get_be32 - return payload of __be32 attribute * @nla: __be32 netlink attribute */static inline __be32 nla_get_be32(const struct nlattr *nla){ return *(__be32 *) nla_data(nla);}
/** * nla_get_be32_default - return payload of be32 attribute or default * @nla: __be32 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __be32 nla_get_be32_default(const struct nlattr *nla, __be32 defvalue){ if (!nla) return defvalue; return nla_get_be32(nla);}
/** * nla_get_le32 - return payload of __le32 attribute * @nla: __le32 netlink attribute */static inline __le32 nla_get_le32(const struct nlattr *nla){ return *(__le32 *) nla_data(nla);}
/** * nla_get_le32_default - return payload of le32 attribute or default * @nla: __le32 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __le32 nla_get_le32_default(const struct nlattr *nla, __le32 defvalue){ if (!nla) return defvalue; return nla_get_le32(nla);}
/** * nla_get_u16 - return payload of u16 attribute * @nla: u16 netlink attribute */static inline u16 nla_get_u16(const struct nlattr *nla){ return *(u16 *) nla_data(nla);}
/** * nla_get_u16_default - return payload of u16 attribute or default * @nla: u16 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline u16 nla_get_u16_default(const struct nlattr *nla, u16 defvalue){ if (!nla) return defvalue; return nla_get_u16(nla);}
/** * nla_get_be16 - return payload of __be16 attribute * @nla: __be16 netlink attribute */static inline __be16 nla_get_be16(const struct nlattr *nla){ return *(__be16 *) nla_data(nla);}
/** * nla_get_be16_default - return payload of be16 attribute or default * @nla: __be16 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __be16 nla_get_be16_default(const struct nlattr *nla, __be16 defvalue){ if (!nla) return defvalue; return nla_get_be16(nla);}
/** * nla_get_le16 - return payload of __le16 attribute * @nla: __le16 netlink attribute */static inline __le16 nla_get_le16(const struct nlattr *nla){ return *(__le16 *) nla_data(nla);}
/** * nla_get_le16_default - return payload of le16 attribute or default * @nla: __le16 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __le16 nla_get_le16_default(const struct nlattr *nla, __le16 defvalue){ if (!nla) return defvalue; return nla_get_le16(nla);}
/** * nla_get_u8 - return payload of u8 attribute * @nla: u8 netlink attribute */static inline u8 nla_get_u8(const struct nlattr *nla){ return *(u8 *) nla_data(nla);}
/** * nla_get_u8_default - return payload of u8 attribute or default * @nla: u8 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline u8 nla_get_u8_default(const struct nlattr *nla, u8 defvalue){ if (!nla) return defvalue; return nla_get_u8(nla);}
/** * nla_get_u64 - return payload of u64 attribute * @nla: u64 netlink attribute */static inline u64 nla_get_u64(const struct nlattr *nla){ u64 tmp;
nla_memcpy(&tmp, nla, sizeof(tmp));
return tmp;}
/** * nla_get_u64_default - return payload of u64 attribute or default * @nla: u64 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline u64 nla_get_u64_default(const struct nlattr *nla, u64 defvalue){ if (!nla) return defvalue; return nla_get_u64(nla);}
/** * nla_get_uint - return payload of uint attribute * @nla: uint netlink attribute */static inline u64 nla_get_uint(const struct nlattr *nla){ if (nla_len(nla) == sizeof(u32)) return nla_get_u32(nla); return nla_get_u64(nla);}
/** * nla_get_uint_default - return payload of uint attribute or default * @nla: uint netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline u64 nla_get_uint_default(const struct nlattr *nla, u64 defvalue){ if (!nla) return defvalue; return nla_get_uint(nla);}
/** * nla_get_be64 - return payload of __be64 attribute * @nla: __be64 netlink attribute */static inline __be64 nla_get_be64(const struct nlattr *nla){ __be64 tmp;
nla_memcpy(&tmp, nla, sizeof(tmp));
return tmp;}
/** * nla_get_be64_default - return payload of be64 attribute or default * @nla: __be64 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __be64 nla_get_be64_default(const struct nlattr *nla, __be64 defvalue){ if (!nla) return defvalue; return nla_get_be64(nla);}
/** * nla_get_le64 - return payload of __le64 attribute * @nla: __le64 netlink attribute */static inline __le64 nla_get_le64(const struct nlattr *nla){ return *(__le64 *) nla_data(nla);}
/** * nla_get_le64_default - return payload of le64 attribute or default * @nla: __le64 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __le64 nla_get_le64_default(const struct nlattr *nla, __le64 defvalue){ if (!nla) return defvalue; return nla_get_le64(nla);}
/** * nla_get_s32 - return payload of s32 attribute * @nla: s32 netlink attribute */static inline s32 nla_get_s32(const struct nlattr *nla){ return *(s32 *) nla_data(nla);}
/** * nla_get_s32_default - return payload of s32 attribute or default * @nla: s32 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline s32 nla_get_s32_default(const struct nlattr *nla, s32 defvalue){ if (!nla) return defvalue; return nla_get_s32(nla);}
/** * nla_get_s16 - return payload of s16 attribute * @nla: s16 netlink attribute */static inline s16 nla_get_s16(const struct nlattr *nla){ return *(s16 *) nla_data(nla);}
/** * nla_get_s16_default - return payload of s16 attribute or default * @nla: s16 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline s16 nla_get_s16_default(const struct nlattr *nla, s16 defvalue){ if (!nla) return defvalue; return nla_get_s16(nla);}
/** * nla_get_s8 - return payload of s8 attribute * @nla: s8 netlink attribute */static inline s8 nla_get_s8(const struct nlattr *nla){ return *(s8 *) nla_data(nla);}
/** * nla_get_s8_default - return payload of s8 attribute or default * @nla: s8 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline s8 nla_get_s8_default(const struct nlattr *nla, s8 defvalue){ if (!nla) return defvalue; return nla_get_s8(nla);}
/** * nla_get_s64 - return payload of s64 attribute * @nla: s64 netlink attribute */static inline s64 nla_get_s64(const struct nlattr *nla){ s64 tmp;
nla_memcpy(&tmp, nla, sizeof(tmp));
return tmp;}
/** * nla_get_s64_default - return payload of s64 attribute or default * @nla: s64 netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline s64 nla_get_s64_default(const struct nlattr *nla, s64 defvalue){ if (!nla) return defvalue; return nla_get_s64(nla);}
/** * nla_get_sint - return payload of uint attribute * @nla: uint netlink attribute */static inline s64 nla_get_sint(const struct nlattr *nla){ if (nla_len(nla) == sizeof(s32)) return nla_get_s32(nla); return nla_get_s64(nla);}
/** * nla_get_sint_default - return payload of sint attribute or default * @nla: sint netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline s64 nla_get_sint_default(const struct nlattr *nla, s64 defvalue){ if (!nla) return defvalue; return nla_get_sint(nla);}
/** * nla_get_flag - return payload of flag attribute * @nla: flag netlink attribute */static inline int nla_get_flag(const struct nlattr *nla){ return !!nla;}
/** * nla_get_msecs - return payload of msecs attribute * @nla: msecs netlink attribute * * Returns: the number of milliseconds in jiffies. */static inline unsigned long nla_get_msecs(const struct nlattr *nla){ u64 msecs = nla_get_u64(nla);
return msecs_to_jiffies((unsigned long) msecs);}
/** * nla_get_msecs_default - return payload of msecs attribute or default * @nla: msecs netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline unsigned long nla_get_msecs_default(const struct nlattr *nla, unsigned long defvalue){ if (!nla) return defvalue; return nla_get_msecs(nla);}
/** * nla_get_in_addr - return payload of IPv4 address attribute * @nla: IPv4 address netlink attribute */static inline __be32 nla_get_in_addr(const struct nlattr *nla){ return *(__be32 *) nla_data(nla);}
/** * nla_get_in_addr_default - return payload of be32 attribute or default * @nla: IPv4 address netlink attribute, may be %NULL * @defvalue: default value to use if @nla is %NULL * * Return: the value of the attribute, or the default value if not present */static inline __be32 nla_get_in_addr_default(const struct nlattr *nla, __be32 defvalue){ if (!nla) return defvalue; return nla_get_in_addr(nla);}
/** * nla_get_in6_addr - return payload of IPv6 address attribute * @nla: IPv6 address netlink attribute */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;}
/** * nla_get_bitfield32 - return payload of 32 bitfield attribute * @nla: nla_bitfield32 attribute */static inline struct nla_bitfield32 nla_get_bitfield32(const struct nlattr *nla){ struct nla_bitfield32 tmp;
nla_memcpy(&tmp, nla, sizeof(tmp)); return tmp;}
/** * nla_memdup - duplicate attribute memory (kmemdup) * @src: netlink attribute to duplicate from * @gfp: GFP mask */static inline void *nla_memdup_noprof(const struct nlattr *src, gfp_t gfp){ return kmemdup_noprof(nla_data(src), nla_len(src), gfp);}#define nla_memdup(...) alloc_hooks(nla_memdup_noprof(__VA_ARGS__))
/** * nla_nest_start_noflag - Start a new level of nested attributes * @skb: socket buffer to add attributes to * @attrtype: attribute type of container * * This function exists for backward compatibility to use in APIs which never * marked their nest attributes with NLA_F_NESTED flag. New APIs should use * nla_nest_start() which sets the flag. * * Returns: the container attribute or NULL on error */static inline struct nlattr *nla_nest_start_noflag(struct sk_buff *skb, int attrtype){ struct nlattr *start = (struct nlattr *)skb_tail_pointer(skb);
if (nla_put(skb, attrtype, 0, NULL) < 0) return NULL;
return start;}
/** * nla_nest_start - Start a new level of nested attributes, with NLA_F_NESTED * @skb: socket buffer to add attributes to * @attrtype: attribute type of container * * Unlike nla_nest_start_noflag(), mark the nest attribute with NLA_F_NESTED * flag. This is the preferred function to use in new code. * * Returns: the container attribute or NULL on error */static inline struct nlattr *nla_nest_start(struct sk_buff *skb, int attrtype){ return nla_nest_start_noflag(skb, attrtype | NLA_F_NESTED);}
/** * nla_nest_end - Finalize nesting of attributes * @skb: socket buffer the attributes are stored in * @start: container attribute * * Corrects the container attribute header to include the all * appended attributes. * * Returns: the total data length of the skb. */static inline int nla_nest_end(struct sk_buff *skb, struct nlattr *start){ unsigned long diff = skb_tail_pointer(skb) - (unsigned char *)start;
DEBUG_NET_WARN_ON_ONCE(diff > U16_MAX); start->nla_len = diff; return skb->len;}
/** * nla_nest_end_safe - Validate and finalize nesting of attributes * @skb: socket buffer the attributes are stored in * @start: container attribute * * Corrects the container attribute header to include all appended * attributes. * * Returns: the total data length of the skb, or -EMSGSIZE if the * nested attribute length exceeds U16_MAX. */static inline int nla_nest_end_safe(struct sk_buff *skb, struct nlattr *start){ if (skb_tail_pointer(skb) - (unsigned char *)start > U16_MAX) return -EMSGSIZE;
return nla_nest_end(skb, start);}
/** * nla_nest_cancel - Cancel nesting of attributes * @skb: socket buffer the message is stored in * @start: container attribute * * Removes the container attribute and including all nested * attributes. Returns -EMSGSIZE */static inline void nla_nest_cancel(struct sk_buff *skb, struct nlattr *start){ nlmsg_trim(skb, start);}
/** * nla_put_empty_nest - Create an empty nest * @skb: socket buffer the message is stored in * @attrtype: attribute type of the container * * This function is a helper for creating empty nests. * * Returns: 0 when successful or -EMSGSIZE on failure. */static inline int nla_put_empty_nest(struct sk_buff *skb, int attrtype){ return nla_nest_start(skb, attrtype) ? 0 : -EMSGSIZE;}
/** * __nla_validate_nested - Validate a stream of nested attributes * @start: container attribute * @maxtype: maximum attribute type to be expected * @policy: validation policy * @validate: validation strictness * @extack: extended ACK report struct * * Validates all attributes in the nested attribute stream against the * specified policy. Attributes with a type exceeding maxtype will be * ignored. See documentation of struct nla_policy for more details. * * Returns: 0 on success or a negative error code. */static inline int __nla_validate_nested(const struct nlattr *start, int maxtype, const struct nla_policy *policy, unsigned int validate, struct netlink_ext_ack *extack){ return __nla_validate(nla_data(start), nla_len(start), maxtype, policy, validate, extack);}
static inline intnla_validate_nested(const struct nlattr *start, int maxtype, const struct nla_policy *policy, struct netlink_ext_ack *extack){ return __nla_validate_nested(start, maxtype, policy, NL_VALIDATE_STRICT, extack);}
static inline intnla_validate_nested_deprecated(const struct nlattr *start, int maxtype, const struct nla_policy *policy, struct netlink_ext_ack *extack){ return __nla_validate_nested(start, maxtype, policy, NL_VALIDATE_LIBERAL, extack);}
/** * 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. */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 * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS defined. * * Returns: zero on success or a negative error code. */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 */static inline int nla_total_size_64bit(int payload){ return NLA_ALIGN(nla_attr_size(payload))#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS + NLA_ALIGN(nla_attr_size(0))#endif ;}
/** * nla_for_each_attr - iterate over a stream of attributes * @pos: loop counter, set to current attribute * @head: head of attribute stream * @len: length of attribute stream * @rem: initialized to len, holds bytes currently remaining in stream */#define nla_for_each_attr(pos, head, len, rem) \ for (pos = head, rem = len; \ nla_ok(pos, rem); \ pos = nla_next(pos, &(rem)))
/** * nla_for_each_attr_type - iterate over a stream of attributes * @pos: loop counter, set to current attribute * @type: required attribute type for @pos * @head: head of attribute stream * @len: length of attribute stream * @rem: initialized to len, holds bytes currently remaining in stream */#define nla_for_each_attr_type(pos, type, head, len, rem) \ nla_for_each_attr(pos, head, len, rem) \ if (nla_type(pos) == type)
/** * nla_for_each_nested - iterate over nested attributes * @pos: loop counter, set to current attribute * @nla: attribute containing the nested attributes * @rem: initialized to len, holds bytes currently remaining in stream */#define nla_for_each_nested(pos, nla, rem) \ nla_for_each_attr(pos, nla_data(nla), nla_len(nla), rem)
/** * nla_for_each_nested_type - iterate over nested attributes * @pos: loop counter, set to current attribute * @type: required attribute type for @pos * @nla: attribute containing the nested attributes * @rem: initialized to len, holds bytes currently remaining in stream */#define nla_for_each_nested_type(pos, type, nla, rem) \ nla_for_each_nested(pos, nla, rem) \ if (nla_type(pos) == type)
/** * nla_is_last - Test if attribute is last in stream * @nla: attribute to test * @rem: bytes remaining in stream */static inline bool nla_is_last(const struct nlattr *nla, int rem){ return nla->nla_len == rem;}
void nla_get_range_unsigned(const struct nla_policy *pt, struct netlink_range_validation *range);void nla_get_range_signed(const struct nla_policy *pt, struct netlink_range_validation_signed *range);
struct netlink_policy_dump_state;
int netlink_policy_dump_add_policy(struct netlink_policy_dump_state **pstate, const struct nla_policy *policy, unsigned int maxtype);int netlink_policy_dump_get_policy_idx(struct netlink_policy_dump_state *state, const struct nla_policy *policy, unsigned int maxtype);bool netlink_policy_dump_loop(struct netlink_policy_dump_state *state);int netlink_policy_dump_write(struct sk_buff *skb, struct netlink_policy_dump_state *state);int netlink_policy_dump_attr_size_estimate(const struct nla_policy *pt);int netlink_policy_dump_write_attr(struct sk_buff *skb, const struct nla_policy *pt, int nestattr);void netlink_policy_dump_free(struct netlink_policy_dump_state *state);
#endif