/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (C) 2013 Jozsef Kadlecsik <[email protected]> */
#ifndef __IP_SET_BITMAP_IP_GEN_H
#define __IP_SET_BITMAP_IP_GEN_H
#include <linux/rcupdate_wait.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_memsize IPSET_TOKEN(MTYPE, _memsize)
#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_cancel_gc IPSET_TOKEN(MTYPE, _cancel_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)(struct timer_list *t))
{
struct mtype *map = set->data;
timer_setup(&map->gc, gc, 0);
mod_timer(&map->gc, jiffies + IPSET_GC_PERIOD(set->timeout) * HZ);
}
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->dsize && set->extensions & IPSET_EXT_DESTROY)
mtype_ext_cleanup(set);
ip_set_free(map->members);
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);
bitmap_zero(map->members, map->elements);
set->elements = 0;
set->ext_size = 0;
}
/* Calculate the actual memory size of the set data */
static size_t
mtype_memsize(const struct mtype *map, size_t dsize)
{
return sizeof(*map) + map->memsize +
map->elements * dsize;
}
static int
mtype_head(struct ip_set *set, struct sk_buff *skb)
{
const struct mtype *map = set->data;
struct nlattr *nested;
size_t memsize = mtype_memsize(map, set->dsize) + set->ext_size;
nested = nla_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)) ||
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) ||
nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(set->elements)))
goto nla_put_failure;
if (unlikely(ip_set_put_flags(skb, set)))
goto nla_put_failure;
nla_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;
return ip_set_match_extensions(set, ext, mext, flags, x);
}
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))) {
set->elements--;
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 (ret > 0)
set->elements--;
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(set, 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);
set->elements++;
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);
set->elements--;
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 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 = nla_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]++) {
cond_resched_rcu();
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(x) &&
#endif
ip_set_timeout_expired(ext_timeout(x, set))))
continue;
nested = nla_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(x)))
goto nla_put_failure;
nla_nest_end(skb, nested);
}
nla_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;
}
nla_nest_end(skb, adt);
out:
rcu_read_unlock();
return ret;
}
static void
mtype_gc(struct timer_list *t)
{
struct mtype *map = from_timer(map, t, gc);
struct ip_set *set = map->set;
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);
set->elements--;
}
}
spin_unlock_bh(&set->lock);
map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ;
add_timer(&map->gc);
}
static void
mtype_cancel_gc(struct ip_set *set)
{
struct mtype *map = set->data;
if (SET_WITH_TIMEOUT(set))
del_timer_sync(&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,
.cancel_gc = mtype_cancel_gc,
};
#endif /* __IP_SET_BITMAP_IP_GEN_H */
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