2 * services/view.h - named views containing local zones authority service.
4 * Copyright (c) 2016, NLnet Labs. All rights reserved.
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39 * This file contains functions to enable named views that can hold local zone
43 #ifndef SERVICES_VIEW_H
44 #define SERVICES_VIEW_H
45 #include "util/rbtree.h"
46 #include "util/locks.h"
53 * Views storage, shared.
56 /** lock on the view tree */
58 /** rbtree of struct view */
63 * View. Named structure holding local authority zones.
66 /** rbtree node, key is name */
69 * Has to be right after rbnode_t due to pointer arithmatic in
70 * view_create's lock protect */
72 /** view specific local authority zones */
73 struct local_zones* local_zones;
74 /** Fallback to global local_zones when there is no match in the view
75 * specific tree. 1 for yes, 0 for no */
77 /** lock on the data in the structure
78 * For the node and name you
79 * need to also hold the views_tree lock to change them (or to
80 * delete this view) */
86 * Create views storage
87 * @return new struct or NULL on error.
89 struct views* views_create(void);
92 * Delete views storage
93 * @param v: views to delete.
95 void views_delete(struct views* v);
98 * Apply config settings;
99 * Takes care of locking.
100 * @param v: view is set up.
101 * @param cfg: config data.
102 * @return false on error.
104 int views_apply_cfg(struct views* v, struct config_file* cfg);
107 * Compare two view entries in rbtree. Sort canonical.
110 * @return: negative, positive or 0 comparison value.
112 int view_cmp(const void* v1, const void* v2);
116 * @param v: view to delete.
118 void view_delete(struct view* v);
121 * Debug helper. Print all views
122 * Takes care of locking.
123 * @param v: the views tree
125 void views_print(struct views* v);
127 /* Find a view by name.
129 * @param name: name of the view we are looking for
130 * @param write: 1 for obtaining write lock on found view, 0 for read lock
131 * @return: locked view or NULL.
133 struct view* views_find_view(struct views* vs, const char* name, int write);
135 #endif /* SERVICES_VIEW_H */