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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
5948f013 SW |
2 | /* |
3 | * Nexthop Group Private Functions. | |
4 | * Copyright (C) 2019 Cumulus Networks, Inc. | |
5 | * Stephen Worley | |
5948f013 SW |
6 | */ |
7 | ||
8 | /** | |
9 | * These functions should only be used internally for nhg_hash_entry | |
10 | * manipulation and in certain special cases. | |
11 | * | |
12 | * Please use `zebra/zebra_nhg.h` for any general nhg_hash_entry api needs. | |
13 | */ | |
14 | ||
15 | #ifndef __ZEBRA_NHG_PRIVATE_H__ | |
16 | #define __ZEBRA_NHG_PRIVATE_H__ | |
17 | ||
18 | #include "zebra/zebra_nhg.h" | |
19 | ||
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20 | #ifdef __cplusplus |
21 | extern "C" { | |
22 | #endif | |
23 | ||
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24 | /* Abstraction for connected trees */ |
25 | struct nhg_connected { | |
26 | struct nhg_connected_tree_item tree_item; | |
27 | struct nhg_hash_entry *nhe; | |
28 | }; | |
29 | ||
30 | static int nhg_connected_cmp(const struct nhg_connected *con1, | |
31 | const struct nhg_connected *con2) | |
32 | { | |
33 | return (con1->nhe->id - con2->nhe->id); | |
34 | } | |
35 | ||
36 | DECLARE_RBTREE_UNIQ(nhg_connected_tree, struct nhg_connected, tree_item, | |
37 | nhg_connected_cmp); | |
38 | ||
39 | /* nhg connected tree direct access functions */ | |
40 | extern void nhg_connected_tree_init(struct nhg_connected_tree_head *head); | |
41 | extern void nhg_connected_tree_free(struct nhg_connected_tree_head *head); | |
42 | extern bool | |
43 | nhg_connected_tree_is_empty(const struct nhg_connected_tree_head *head); | |
44 | extern struct nhg_connected * | |
45 | nhg_connected_tree_root(struct nhg_connected_tree_head *head); | |
5bf15faa SW |
46 | |
47 | /* I realize _add/_del returns are backwords. | |
48 | * | |
49 | * Currently the list APIs are not standardized for what happens in | |
50 | * the _del() function when the item isn't present. | |
51 | * | |
52 | * We are choosing to return NULL if not found in the _del case for now. | |
53 | */ | |
54 | ||
55 | /* Delete NHE from the tree. On success, return the NHE, otherwise NULL. */ | |
56 | extern struct nhg_hash_entry * | |
57 | nhg_connected_tree_del_nhe(struct nhg_connected_tree_head *head, | |
58 | struct nhg_hash_entry *nhe); | |
59 | /* ADD NHE to the tree. On success, return NULL, otherwise return the NHE. */ | |
60 | extern struct nhg_hash_entry * | |
61 | nhg_connected_tree_add_nhe(struct nhg_connected_tree_head *head, | |
62 | struct nhg_hash_entry *nhe); | |
5948f013 | 63 | |
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64 | #ifdef __cplusplus |
65 | } | |
66 | #endif | |
67 | ||
5948f013 | 68 | #endif /* __ZEBRA_NHG_PRIVATE_H__ */ |