f3c928008a
ynl.h has a growing amount of "internal" stuff, which may confuse users who try to take a look at the external API. Currently the internals are at the bottom of the file with a banner in between, but this arrangement makes it hard to add external APIs / inline helpers which need internal definitions. Move internals to a separate header. Link: https://lore.kernel.org/r/20231202211225.342466-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
145 lines
3.2 KiB
C
145 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
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#ifndef __YNL_C_PRIV_H
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#define __YNL_C_PRIV_H 1
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#include <stddef.h>
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#include <libmnl/libmnl.h>
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#include <linux/types.h>
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/*
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* YNL internals / low level stuff
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*/
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/* Generic mnl helper code */
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enum ynl_policy_type {
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YNL_PT_REJECT = 1,
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YNL_PT_IGNORE,
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YNL_PT_NEST,
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YNL_PT_FLAG,
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YNL_PT_BINARY,
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YNL_PT_U8,
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YNL_PT_U16,
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YNL_PT_U32,
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YNL_PT_U64,
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YNL_PT_UINT,
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YNL_PT_NUL_STR,
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YNL_PT_BITFIELD32,
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};
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struct ynl_policy_attr {
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enum ynl_policy_type type;
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unsigned int len;
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const char *name;
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struct ynl_policy_nest *nest;
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};
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struct ynl_policy_nest {
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unsigned int max_attr;
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struct ynl_policy_attr *table;
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};
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struct ynl_parse_arg {
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struct ynl_sock *ys;
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struct ynl_policy_nest *rsp_policy;
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void *data;
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};
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struct ynl_dump_list_type {
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struct ynl_dump_list_type *next;
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unsigned char data[] __attribute__((aligned(8)));
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};
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extern struct ynl_dump_list_type *YNL_LIST_END;
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static inline bool ynl_dump_obj_is_last(void *obj)
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{
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unsigned long uptr = (unsigned long)obj;
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uptr -= offsetof(struct ynl_dump_list_type, data);
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return uptr == (unsigned long)YNL_LIST_END;
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}
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static inline void *ynl_dump_obj_next(void *obj)
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{
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unsigned long uptr = (unsigned long)obj;
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struct ynl_dump_list_type *list;
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uptr -= offsetof(struct ynl_dump_list_type, data);
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list = (void *)uptr;
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uptr = (unsigned long)list->next;
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uptr += offsetof(struct ynl_dump_list_type, data);
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return (void *)uptr;
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}
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struct ynl_ntf_base_type {
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__u16 family;
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__u8 cmd;
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struct ynl_ntf_base_type *next;
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void (*free)(struct ynl_ntf_base_type *ntf);
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unsigned char data[] __attribute__((aligned(8)));
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};
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extern mnl_cb_t ynl_cb_array[NLMSG_MIN_TYPE];
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struct nlmsghdr *
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ynl_gemsg_start_req(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
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struct nlmsghdr *
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ynl_gemsg_start_dump(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
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int ynl_attr_validate(struct ynl_parse_arg *yarg, const struct nlattr *attr);
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int ynl_recv_ack(struct ynl_sock *ys, int ret);
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int ynl_cb_null(const struct nlmsghdr *nlh, void *data);
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/* YNL specific helpers used by the auto-generated code */
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struct ynl_req_state {
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struct ynl_parse_arg yarg;
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mnl_cb_t cb;
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__u32 rsp_cmd;
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};
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struct ynl_dump_state {
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struct ynl_sock *ys;
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struct ynl_policy_nest *rsp_policy;
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void *first;
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struct ynl_dump_list_type *last;
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size_t alloc_sz;
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mnl_cb_t cb;
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__u32 rsp_cmd;
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};
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struct ynl_ntf_info {
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struct ynl_policy_nest *policy;
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mnl_cb_t cb;
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size_t alloc_sz;
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void (*free)(struct ynl_ntf_base_type *ntf);
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};
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int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
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struct ynl_req_state *yrs);
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int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
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struct ynl_dump_state *yds);
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void ynl_error_unknown_notification(struct ynl_sock *ys, __u8 cmd);
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int ynl_error_parse(struct ynl_parse_arg *yarg, const char *msg);
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#ifndef MNL_HAS_AUTO_SCALARS
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static inline uint64_t mnl_attr_get_uint(const struct nlattr *attr)
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{
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if (mnl_attr_get_payload_len(attr) == 4)
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return mnl_attr_get_u32(attr);
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return mnl_attr_get_u64(attr);
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}
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static inline void
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mnl_attr_put_uint(struct nlmsghdr *nlh, uint16_t type, uint64_t data)
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{
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if ((uint32_t)data == (uint64_t)data)
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return mnl_attr_put_u32(nlh, type, data);
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return mnl_attr_put_u64(nlh, type, data);
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}
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#endif
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#endif
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