static int
list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext,
struct ip_set_ext *mext, u32 flags)
{
struct list_set *map = set->data;
struct set_adt_elem *d = value;
struct set_elem *e;
bool flag_exist = flags & IPSET_FLAG_EXIST;
u32 i, ret = 0;
if (SET_WITH_TIMEOUT(set))
set_cleanup_entries(set);
/* Check already added element */
for (i = 0; i < map->size; i++) {
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
goto insert;
else if (e->id != d->id)
continue;
if ((d->before > 1 && !id_eq(set, i + 1, d->refid)) ||
(d->before < 0 &&
(i == 0 || !id_eq(set, i - 1, d->refid))))
/* Before/after doesn't match */
return -IPSET_ERR_REF_EXIST;
if (!flag_exist)
/* Can't re-add */
return -IPSET_ERR_EXIST;
/* Update extensions */
ip_set_ext_destroy(set, e);
if (SET_WITH_TIMEOUT(set))
ip_set_timeout_set(ext_timeout(e, set), ext->timeout);
if (SET_WITH_COUNTER(set))
ip_set_init_counter(ext_counter(e, set), ext);
if (SET_WITH_COMMENT(set))
ip_set_init_comment(ext_comment(e, set), ext);
/* Set is already added to the list */
ip_set_put_byindex(map->net, d->id);
return 0;
}
insert:
ret = -IPSET_ERR_LIST_FULL;
for (i = 0; i < map->size && ret == -IPSET_ERR_LIST_FULL; i++) {
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
ret = d->before != 0 ? -IPSET_ERR_REF_EXIST
: list_set_add(set, i, d, ext);
else if (e->id != d->refid)
continue;
else if (d->before > 0)
ret = list_set_add(set, i, d, ext);
else if (i + 1 < map->size)
ret = list_set_add(set, i + 1, d, ext);
}
return ret;
}
static int
list_set_utest(struct ip_set *set, void *value, const struct ip_set_ext *ext,
struct ip_set_ext *mext, u32 flags)
{
struct list_set *map = set->data;
struct set_adt_elem *d = value;
struct set_elem *e;
u32 i;
int ret;
for (i = 0; i < map->size; i++) {
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
return 0;
else if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(e, set)))
continue;
else if (e->id != d->id)
continue;
if (d->before == 0)
return 1;
else if (d->before > 0)
ret = id_eq(set, i + 1, d->refid);
else
ret = i > 0 && id_eq(set, i - 1, d->refid);
return ret;
}
return 0;
}
static int
list_set_udel(struct ip_set *set, void *value, const struct ip_set_ext *ext,
struct ip_set_ext *mext, u32 flags)
{
struct list_set *map = set->data;
struct set_adt_elem *d = value;
struct set_elem *e;
u32 i;
for (i = 0; i < map->size; i++) {
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
return d->before != 0 ? -IPSET_ERR_REF_EXIST
: -IPSET_ERR_EXIST;
else if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(e, set)))
continue;
else if (e->id != d->id)
continue;
if (d->before == 0)
return list_set_del(set, i);
else if (d->before > 0) {
if (!id_eq(set, i + 1, d->refid))
return -IPSET_ERR_REF_EXIST;
return list_set_del(set, i);
} else if (i == 0 || !id_eq(set, i - 1, d->refid))
return -IPSET_ERR_REF_EXIST;
else
return list_set_del(set, i);
}
return -IPSET_ERR_EXIST;
}
static int
list_set_ktest(struct ip_set *set, const struct sk_buff *skb,
const struct xt_action_param *par,
struct ip_set_adt_opt *opt, const struct ip_set_ext *ext)
{
struct list_set *map = set->data;
struct set_elem *e;
u32 i, cmdflags = opt->cmdflags;
int ret;
/* Don't lookup sub-counters at all */
opt->cmdflags &= ~IPSET_FLAG_MATCH_COUNTERS;
if (opt->cmdflags & IPSET_FLAG_SKIP_SUBCOUNTER_UPDATE)
opt->cmdflags &= ~IPSET_FLAG_SKIP_COUNTER_UPDATE;
for (i = 0; i < map->size; i++) {
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
return 0;
if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(e, set)))
continue;
ret = ip_set_test(e->id, skb, par, opt);
if (ret > 0) {
if (SET_WITH_COUNTER(set))
ip_set_update_counter(ext_counter(e, set),
ext, &opt->ext,
cmdflags);
return ret;
}
}
return 0;
}
static int
list_set_del(struct ip_set *set, u32 i)
{
struct list_set *map = set->data;
struct set_elem *e = list_set_elem(set, map, i);
ip_set_put_byindex(map->net, e->id);
ip_set_ext_destroy(set, e);
if (i < map->size - 1)
memmove(e, list_set_elem(set, map, i + 1),
set->dsize * (map->size - (i + 1)));
/* Last element */
e = list_set_elem(set, map, map->size - 1);
e->id = IPSET_INVALID_ID;
return 0;
}
static int
list_set_list(const struct ip_set *set,
struct sk_buff *skb, struct netlink_callback *cb)
{
const struct list_set *map = set->data;
struct nlattr *atd, *nested;
u32 i, first = cb->args[2];
const struct set_elem *e;
atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
if (!atd)
return -EMSGSIZE;
for (; cb->args[2] < map->size; cb->args[2]++) {
i = cb->args[2];
e = list_set_elem(map, i);
if (e->id == IPSET_INVALID_ID)
goto finish;
if (with_timeout(map->timeout) && list_set_expired(map, i))
continue;
nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
if (!nested) {
if (i == first) {
nla_nest_cancel(skb, atd);
return -EMSGSIZE;
} else
goto nla_put_failure;
}
if (nla_put_string(skb, IPSET_ATTR_NAME,
ip_set_name_byindex(e->id)))
goto nla_put_failure;
if (with_timeout(map->timeout)) {
const struct set_telem *te =
(const struct set_telem *) e;
__be32 to = htonl(ip_set_timeout_get(te->timeout));
if (nla_put_net32(skb, IPSET_ATTR_TIMEOUT, to))
goto nla_put_failure;
}
ipset_nest_end(skb, nested);
}
finish:
ipset_nest_end(skb, atd);
/* Set listing finished */
cb->args[2] = 0;
return 0;
nla_put_failure:
nla_nest_cancel(skb, nested);
ipset_nest_end(skb, atd);
if (unlikely(i == first)) {
cb->args[2] = 0;
return -EMSGSIZE;
}
return 0;
}
static bool
id_eq(const struct list_set *map, u32 i, ip_set_id_t id)
{
const struct set_elem *elem;
if (i < map->size) {
elem = list_set_elem(map, i);
return elem->id == id;
}
return 0;
}
static int
list_set_del(struct list_set *map, u32 i)
{
struct set_elem *a = list_set_elem(map, i), *b;
ip_set_put_byindex(a->id);
for (; i < map->size - 1; i++) {
b = list_set_elem(map, i + 1);
a->id = b->id;
if (with_timeout(map->timeout))
((struct set_telem *)a)->timeout =
((struct set_telem *)b)->timeout;
a = b;
if (a->id == IPSET_INVALID_ID)
break;
}
/* Last element */
a->id = IPSET_INVALID_ID;
return 0;
}
static void
list_elem_add(struct list_set *map, u32 i, ip_set_id_t id)
{
struct set_elem *e;
for (; i < map->size; i++) {
e = list_set_elem(map, i);
swap(e->id, id);
if (e->id == IPSET_INVALID_ID)
break;
}
}
static int
list_set_add(struct ip_set *set, u32 i, struct set_adt_elem *d,
const struct ip_set_ext *ext)
{
struct list_set *map = set->data;
struct set_elem *e = list_set_elem(set, map, i);
if (e->id != IPSET_INVALID_ID) {
if (i == map->size - 1) {
/* Last element replaced: e.g. add new,before,last */
ip_set_put_byindex(map->net, e->id);
ip_set_ext_destroy(set, e);
} else {
struct set_elem *x = list_set_elem(set, map,
map->size - 1);
/* Last element pushed off */
if (x->id != IPSET_INVALID_ID) {
ip_set_put_byindex(map->net, x->id);
ip_set_ext_destroy(set, x);
}
memmove(list_set_elem(set, map, i + 1), e,
set->dsize * (map->size - (i + 1)));
/* Extensions must be initialized to zero */
memset(e, 0, set->dsize);
}
}
e->id = d->id;
if (SET_WITH_TIMEOUT(set))
ip_set_timeout_set(ext_timeout(e, set), ext->timeout);
if (SET_WITH_COUNTER(set))
ip_set_init_counter(ext_counter(e, set), ext);
if (SET_WITH_COMMENT(set))
ip_set_init_comment(ext_comment(e, set), ext);
if (SET_WITH_SKBINFO(set))
ip_set_init_skbinfo(ext_skbinfo(e, set), ext);
return 0;
}
static int
list_set_list(const struct ip_set *set,
struct sk_buff *skb, struct netlink_callback *cb)
{
const struct list_set *map = set->data;
struct nlattr *atd, *nested;
u32 i, first = cb->args[IPSET_CB_ARG0];
const struct set_elem *e;
atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
if (!atd)
return -EMSGSIZE;
for (; cb->args[IPSET_CB_ARG0] < map->size;
cb->args[IPSET_CB_ARG0]++) {
i = cb->args[IPSET_CB_ARG0];
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
goto finish;
if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(e, set)))
continue;
nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
if (!nested) {
if (i == first) {
nla_nest_cancel(skb, atd);
return -EMSGSIZE;
} else
goto nla_put_failure;
}
if (nla_put_string(skb, IPSET_ATTR_NAME,
ip_set_name_byindex(map->net, e->id)))
goto nla_put_failure;
if (ip_set_put_extensions(skb, set, e, true))
goto nla_put_failure;
ipset_nest_end(skb, nested);
}
finish:
ipset_nest_end(skb, atd);
/* Set listing finished */
cb->args[IPSET_CB_ARG0] = 0;
return 0;
nla_put_failure:
nla_nest_cancel(skb, nested);
if (unlikely(i == first)) {
cb->args[IPSET_CB_ARG0] = 0;
return -EMSGSIZE;
}
ipset_nest_end(skb, atd);
return 0;
}
static bool
id_eq_timeout(const struct list_set *map, u32 i, ip_set_id_t id)
{
const struct set_elem *elem;
if (i < map->size) {
elem = list_set_elem(map, i);
return !!(elem->id == id &&
!(with_timeout(map->timeout) &&
list_set_expired(map, i)));
}
return 0;
}
static bool
id_eq(const struct ip_set *set, u32 i, ip_set_id_t id)
{
const struct list_set *map = set->data;
const struct set_elem *e;
if (i >= map->size)
return 0;
e = list_set_elem(set, map, i);
return !!(e->id == id &&
!(SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(e, set))));
}
static void
list_set_flush(struct ip_set *set)
{
struct list_set *map = set->data;
struct set_elem *elem;
u32 i;
for (i = 0; i < map->size; i++) {
elem = list_set_elem(map, i);
if (elem->id != IPSET_INVALID_ID) {
ip_set_put_byindex(elem->id);
elem->id = IPSET_INVALID_ID;
}
}
}
static void
list_set_flush(struct ip_set *set)
{
struct list_set *map = set->data;
struct set_elem *e;
u32 i;
for (i = 0; i < map->size; i++) {
e = list_set_elem(set, map, i);
if (e->id != IPSET_INVALID_ID) {
ip_set_put_byindex(map->net, e->id);
ip_set_ext_destroy(set, e);
e->id = IPSET_INVALID_ID;
}
}
}
static int
list_set_add(struct list_set *map, u32 i, ip_set_id_t id,
unsigned long timeout)
{
const struct set_elem *e = list_set_elem(map, i);
if (i == map->size - 1 && e->id != IPSET_INVALID_ID)
/* Last element replaced: e.g. add new,before,last */
ip_set_put_byindex(e->id);
if (with_timeout(map->timeout))
list_elem_tadd(map, i, id, ip_set_timeout_set(timeout));
else
list_elem_add(map, i, id);
return 0;
}
static void
set_cleanup_entries(struct ip_set *set)
{
struct list_set *map = set->data;
struct set_elem *e;
u32 i = 0;
while (i < map->size) {
e = list_set_elem(set, map, i);
if (e->id != IPSET_INVALID_ID &&
ip_set_timeout_expired(ext_timeout(e, set)))
list_set_del(set, i);
/* Check element moved to position i in next loop */
else
i++;
}
}
static bool
init_list_set(struct net *net, struct ip_set *set, u32 size)
{
struct list_set *map;
struct set_elem *e;
u32 i;
map = kzalloc(sizeof(*map) + size * set->dsize, GFP_KERNEL);
if (!map)
return false;
map->size = size;
map->net = net;
set->data = map;
for (i = 0; i < size; i++) {
e = list_set_elem(set, map, i);
e->id = IPSET_INVALID_ID;
}
return true;
}
static int
list_set_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct xt_action_param *par,
enum ipset_adt adt, const struct ip_set_adt_opt *opt)
{
struct list_set *map = set->data;
struct set_elem *elem;
u32 i;
int ret;
for (i = 0; i < map->size; i++) {
elem = list_set_elem(map, i);
if (elem->id == IPSET_INVALID_ID)
return 0;
if (with_timeout(map->timeout) && list_set_expired(map, i))
continue;
switch (adt) {
case IPSET_TEST:
ret = ip_set_test(elem->id, skb, par, opt);
if (ret > 0)
return ret;
break;
case IPSET_ADD:
ret = ip_set_add(elem->id, skb, par, opt);
if (ret == 0)
return ret;
break;
case IPSET_DEL:
ret = ip_set_del(elem->id, skb, par, opt);
if (ret == 0)
return ret;
break;
default:
break;
}
}
return -EINVAL;
}
static int
list_set_kadd(struct ip_set *set, const struct sk_buff *skb,
const struct xt_action_param *par,
struct ip_set_adt_opt *opt, const struct ip_set_ext *ext)
{
struct list_set *map = set->data;
struct set_elem *e;
u32 i;
int ret;
for (i = 0; i < map->size; i++) {
e = list_set_elem(set, map, i);
if (e->id == IPSET_INVALID_ID)
return 0;
if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(e, set)))
continue;
ret = ip_set_add(e->id, skb, par, opt);
if (ret == 0)
return ret;
}
return 0;
}
static bool
init_list_set(struct ip_set *set, u32 size, size_t dsize,
unsigned long timeout)
{
struct list_set *map;
struct set_elem *e;
u32 i;
map = kzalloc(sizeof(*map) + size * dsize, GFP_KERNEL);
if (!map)
return false;
map->size = size;
map->dsize = dsize;
map->timeout = timeout;
set->data = map;
for (i = 0; i < size; i++) {
e = list_set_elem(map, i);
e->id = IPSET_INVALID_ID;
}
return true;
}
static int
list_set_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
struct list_set *map = set->data;
bool with_timeout = with_timeout(map->timeout);
bool flag_exist = flags & IPSET_FLAG_EXIST;
int before = 0;
u32 timeout = map->timeout;
ip_set_id_t id, refid = IPSET_INVALID_ID;
const struct set_elem *elem;
struct ip_set *s;
u32 i;
int ret = 0;
if (unlikely(!tb[IPSET_ATTR_NAME] ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
!ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
return -IPSET_ERR_PROTOCOL;
if (tb[IPSET_ATTR_LINENO])
*lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
id = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAME]), &s);
if (id == IPSET_INVALID_ID)
return -IPSET_ERR_NAME;
/* "Loop detection" */
if (s->type->features & IPSET_TYPE_NAME) {
ret = -IPSET_ERR_LOOP;
goto finish;
}
if (tb[IPSET_ATTR_CADT_FLAGS]) {
u32 f = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
before = f & IPSET_FLAG_BEFORE;
}
if (before && !tb[IPSET_ATTR_NAMEREF]) {
ret = -IPSET_ERR_BEFORE;
goto finish;
}
if (tb[IPSET_ATTR_NAMEREF]) {
refid = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAMEREF]),
&s);
if (refid == IPSET_INVALID_ID) {
ret = -IPSET_ERR_NAMEREF;
goto finish;
}
if (!before)
before = -1;
}
if (tb[IPSET_ATTR_TIMEOUT]) {
if (!with_timeout) {
ret = -IPSET_ERR_TIMEOUT;
goto finish;
}
timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
}
if (with_timeout && adt != IPSET_TEST)
cleanup_entries(map);
switch (adt) {
case IPSET_TEST:
for (i = 0; i < map->size && !ret; i++) {
elem = list_set_elem(map, i);
if (elem->id == IPSET_INVALID_ID ||
(before != 0 && i + 1 >= map->size))
break;
else if (with_timeout && list_set_expired(map, i))
continue;
else if (before > 0 && elem->id == id)
ret = id_eq_timeout(map, i + 1, refid);
else if (before < 0 && elem->id == refid)
ret = id_eq_timeout(map, i + 1, id);
else if (before == 0 && elem->id == id)
ret = 1;
}
break;
case IPSET_ADD:
for (i = 0; i < map->size; i++) {
elem = list_set_elem(map, i);
if (elem->id != id)
continue;
if (!(with_timeout && flag_exist)) {
ret = -IPSET_ERR_EXIST;
goto finish;
} else {
struct set_telem *e = list_set_telem(map, i);
if ((before > 1 &&
!id_eq(map, i + 1, refid)) ||
(before < 0 &&
(i == 0 || !id_eq(map, i - 1, refid)))) {
ret = -IPSET_ERR_EXIST;
goto finish;
}
e->timeout = ip_set_timeout_set(timeout);
ip_set_put_byindex(id);
ret = 0;
goto finish;
}
}
ret = -IPSET_ERR_LIST_FULL;
for (i = 0; i < map->size && ret == -IPSET_ERR_LIST_FULL; i++) {
elem = list_set_elem(map, i);
if (elem->id == IPSET_INVALID_ID)
ret = before != 0 ? -IPSET_ERR_REF_EXIST
: list_set_add(map, i, id, timeout);
else if (elem->id != refid)
continue;
else if (before > 0)
ret = list_set_add(map, i, id, timeout);
else if (i + 1 < map->size)
ret = list_set_add(map, i + 1, id, timeout);
}
break;
case IPSET_DEL:
ret = -IPSET_ERR_EXIST;
for (i = 0; i < map->size && ret == -IPSET_ERR_EXIST; i++) {
elem = list_set_elem(map, i);
if (elem->id == IPSET_INVALID_ID) {
ret = before != 0 ? -IPSET_ERR_REF_EXIST
: -IPSET_ERR_EXIST;
break;
} else if (elem->id == id &&
(before == 0 ||
(before > 0 && id_eq(map, i + 1, refid))))
ret = list_set_del(map, i);
else if (elem->id == refid &&
before < 0 && id_eq(map, i + 1, id))
ret = list_set_del(map, i + 1);
}
break;
default:
break;
}
finish:
if (refid != IPSET_INVALID_ID)
ip_set_put_byindex(refid);
if (adt != IPSET_ADD || ret)
ip_set_put_byindex(id);
return ip_set_eexist(ret, flags) ? 0 : ret;
}
