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- /* Copyright (C) 2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #ifndef __IP_SET_BITMAP_IP_GEN_H
- #define __IP_SET_BITMAP_IP_GEN_H
- #define mtype_do_test IPSET_TOKEN(MTYPE, _do_test)
- #define mtype_gc_test IPSET_TOKEN(MTYPE, _gc_test)
- #define mtype_is_filled IPSET_TOKEN(MTYPE, _is_filled)
- #define mtype_do_add IPSET_TOKEN(MTYPE, _do_add)
- #define mtype_ext_cleanup IPSET_TOKEN(MTYPE, _ext_cleanup)
- #define mtype_do_del IPSET_TOKEN(MTYPE, _do_del)
- #define mtype_do_list IPSET_TOKEN(MTYPE, _do_list)
- #define mtype_do_head IPSET_TOKEN(MTYPE, _do_head)
- #define mtype_adt_elem IPSET_TOKEN(MTYPE, _adt_elem)
- #define mtype_add_timeout IPSET_TOKEN(MTYPE, _add_timeout)
- #define mtype_gc_init IPSET_TOKEN(MTYPE, _gc_init)
- #define mtype_kadt IPSET_TOKEN(MTYPE, _kadt)
- #define mtype_uadt IPSET_TOKEN(MTYPE, _uadt)
- #define mtype_destroy IPSET_TOKEN(MTYPE, _destroy)
- #define mtype_flush IPSET_TOKEN(MTYPE, _flush)
- #define mtype_head IPSET_TOKEN(MTYPE, _head)
- #define mtype_same_set IPSET_TOKEN(MTYPE, _same_set)
- #define mtype_elem IPSET_TOKEN(MTYPE, _elem)
- #define mtype_test IPSET_TOKEN(MTYPE, _test)
- #define mtype_add IPSET_TOKEN(MTYPE, _add)
- #define mtype_del IPSET_TOKEN(MTYPE, _del)
- #define mtype_list IPSET_TOKEN(MTYPE, _list)
- #define mtype_gc IPSET_TOKEN(MTYPE, _gc)
- #define mtype MTYPE
- #define get_ext(set, map, id) ((map)->extensions + ((set)->dsize * (id)))
- static void
- mtype_gc_init(struct ip_set *set, void (*gc)(unsigned long ul_set))
- {
- struct mtype *map = set->data;
- init_timer(&map->gc);
- map->gc.data = (unsigned long)set;
- map->gc.function = gc;
- map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ;
- add_timer(&map->gc);
- }
- static void
- mtype_ext_cleanup(struct ip_set *set)
- {
- struct mtype *map = set->data;
- u32 id;
- for (id = 0; id < map->elements; id++)
- if (test_bit(id, map->members))
- ip_set_ext_destroy(set, get_ext(set, map, id));
- }
- static void
- mtype_destroy(struct ip_set *set)
- {
- struct mtype *map = set->data;
- if (SET_WITH_TIMEOUT(set))
- del_timer_sync(&map->gc);
- ip_set_free(map->members);
- if (set->dsize && set->extensions & IPSET_EXT_DESTROY)
- mtype_ext_cleanup(set);
- ip_set_free(map);
- set->data = NULL;
- }
- static void
- mtype_flush(struct ip_set *set)
- {
- struct mtype *map = set->data;
- if (set->extensions & IPSET_EXT_DESTROY)
- mtype_ext_cleanup(set);
- memset(map->members, 0, map->memsize);
- }
- static int
- mtype_head(struct ip_set *set, struct sk_buff *skb)
- {
- const struct mtype *map = set->data;
- struct nlattr *nested;
- size_t memsize = sizeof(*map) + map->memsize;
- nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
- if (!nested)
- goto nla_put_failure;
- if (mtype_do_head(skb, map) ||
- nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref - 1)) ||
- nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)))
- goto nla_put_failure;
- if (unlikely(ip_set_put_flags(skb, set)))
- goto nla_put_failure;
- ipset_nest_end(skb, nested);
- return 0;
- nla_put_failure:
- return -EMSGSIZE;
- }
- static int
- mtype_test(struct ip_set *set, void *value, const struct ip_set_ext *ext,
- struct ip_set_ext *mext, u32 flags)
- {
- struct mtype *map = set->data;
- const struct mtype_adt_elem *e = value;
- void *x = get_ext(set, map, e->id);
- int ret = mtype_do_test(e, map, set->dsize);
- if (ret <= 0)
- return ret;
- if (SET_WITH_TIMEOUT(set) &&
- ip_set_timeout_expired(ext_timeout(x, set)))
- return 0;
- if (SET_WITH_COUNTER(set))
- ip_set_update_counter(ext_counter(x, set), ext, mext, flags);
- if (SET_WITH_SKBINFO(set))
- ip_set_get_skbinfo(ext_skbinfo(x, set), ext, mext, flags);
- return 1;
- }
- static int
- mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
- struct ip_set_ext *mext, u32 flags)
- {
- struct mtype *map = set->data;
- const struct mtype_adt_elem *e = value;
- void *x = get_ext(set, map, e->id);
- int ret = mtype_do_add(e, map, flags, set->dsize);
- if (ret == IPSET_ADD_FAILED) {
- if (SET_WITH_TIMEOUT(set) &&
- ip_set_timeout_expired(ext_timeout(x, set))) {
- ret = 0;
- } else if (!(flags & IPSET_FLAG_EXIST)) {
- set_bit(e->id, map->members);
- return -IPSET_ERR_EXIST;
- }
- /* Element is re-added, cleanup extensions */
- ip_set_ext_destroy(set, x);
- }
- if (SET_WITH_TIMEOUT(set))
- #ifdef IP_SET_BITMAP_STORED_TIMEOUT
- mtype_add_timeout(ext_timeout(x, set), e, ext, set, map, ret);
- #else
- ip_set_timeout_set(ext_timeout(x, set), ext->timeout);
- #endif
- if (SET_WITH_COUNTER(set))
- ip_set_init_counter(ext_counter(x, set), ext);
- if (SET_WITH_COMMENT(set))
- ip_set_init_comment(ext_comment(x, set), ext);
- if (SET_WITH_SKBINFO(set))
- ip_set_init_skbinfo(ext_skbinfo(x, set), ext);
- /* Activate element */
- set_bit(e->id, map->members);
- return 0;
- }
- static int
- mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
- struct ip_set_ext *mext, u32 flags)
- {
- struct mtype *map = set->data;
- const struct mtype_adt_elem *e = value;
- void *x = get_ext(set, map, e->id);
- if (mtype_do_del(e, map))
- return -IPSET_ERR_EXIST;
- ip_set_ext_destroy(set, x);
- if (SET_WITH_TIMEOUT(set) &&
- ip_set_timeout_expired(ext_timeout(x, set)))
- return -IPSET_ERR_EXIST;
- return 0;
- }
- #ifndef IP_SET_BITMAP_STORED_TIMEOUT
- static inline bool
- mtype_is_filled(const struct mtype_elem *x)
- {
- return true;
- }
- #endif
- static int
- mtype_list(const struct ip_set *set,
- struct sk_buff *skb, struct netlink_callback *cb)
- {
- struct mtype *map = set->data;
- struct nlattr *adt, *nested;
- void *x;
- u32 id, first = cb->args[IPSET_CB_ARG0];
- int ret = 0;
- adt = ipset_nest_start(skb, IPSET_ATTR_ADT);
- if (!adt)
- return -EMSGSIZE;
- /* Extensions may be replaced */
- rcu_read_lock();
- for (; cb->args[IPSET_CB_ARG0] < map->elements;
- cb->args[IPSET_CB_ARG0]++) {
- id = cb->args[IPSET_CB_ARG0];
- x = get_ext(set, map, id);
- if (!test_bit(id, map->members) ||
- (SET_WITH_TIMEOUT(set) &&
- #ifdef IP_SET_BITMAP_STORED_TIMEOUT
- mtype_is_filled((const struct mtype_elem *)x) &&
- #endif
- ip_set_timeout_expired(ext_timeout(x, set))))
- continue;
- nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
- if (!nested) {
- if (id == first) {
- nla_nest_cancel(skb, adt);
- ret = -EMSGSIZE;
- goto out;
- }
- goto nla_put_failure;
- }
- if (mtype_do_list(skb, map, id, set->dsize))
- goto nla_put_failure;
- if (ip_set_put_extensions(skb, set, x,
- mtype_is_filled((const struct mtype_elem *)x)))
- goto nla_put_failure;
- ipset_nest_end(skb, nested);
- }
- ipset_nest_end(skb, adt);
- /* Set listing finished */
- cb->args[IPSET_CB_ARG0] = 0;
- goto out;
- nla_put_failure:
- nla_nest_cancel(skb, nested);
- if (unlikely(id == first)) {
- cb->args[IPSET_CB_ARG0] = 0;
- ret = -EMSGSIZE;
- }
- ipset_nest_end(skb, adt);
- out:
- rcu_read_unlock();
- return ret;
- }
- static void
- mtype_gc(unsigned long ul_set)
- {
- struct ip_set *set = (struct ip_set *)ul_set;
- struct mtype *map = set->data;
- void *x;
- u32 id;
- /* We run parallel with other readers (test element)
- * but adding/deleting new entries is locked out
- */
- spin_lock_bh(&set->lock);
- for (id = 0; id < map->elements; id++)
- if (mtype_gc_test(id, map, set->dsize)) {
- x = get_ext(set, map, id);
- if (ip_set_timeout_expired(ext_timeout(x, set))) {
- clear_bit(id, map->members);
- ip_set_ext_destroy(set, x);
- }
- }
- spin_unlock_bh(&set->lock);
- map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ;
- add_timer(&map->gc);
- }
- static const struct ip_set_type_variant mtype = {
- .kadt = mtype_kadt,
- .uadt = mtype_uadt,
- .adt = {
- [IPSET_ADD] = mtype_add,
- [IPSET_DEL] = mtype_del,
- [IPSET_TEST] = mtype_test,
- },
- .destroy = mtype_destroy,
- .flush = mtype_flush,
- .head = mtype_head,
- .list = mtype_list,
- .same_set = mtype_same_set,
- };
- #endif /* __IP_SET_BITMAP_IP_GEN_H */
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