--- /dev/null
+#ifndef _IP_SET_AHASH_H
+#define _IP_SET_AHASH_H
+
+#include <linux/rcupdate.h>
+#include <linux/jhash.h>
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+
+/* Hashing which uses arrays to resolve clashing. The hash table is resized
+ * (doubled) when searching becomes too long.
+ * Internally jhash is used with the assumption that the size of the
+ * stored data is a multiple of sizeof(u32). If storage supports timeout,
+ * the timeout field must be the last one in the data structure - that field
+ * is ignored when computing the hash key.
+ *
+ * Readers and resizing
+ *
+ * Resizing can be triggered by userspace command only, and those
+ * are serialized by the nfnl mutex. During resizing the set is
+ * read-locked, so the only possible concurrent operations are
+ * the kernel side readers. Those must be protected by proper RCU locking.
+ */
+
+/* Number of elements to store in an initial array block */
+#define AHASH_INIT_SIZE 4
+/* Max number of elements to store in an array block */
+#define AHASH_MAX_SIZE (3*4)
+
+/* A hash bucket */
+struct hbucket {
+ void *value; /* the array of the values */
+ u8 size; /* size of the array */
+ u8 pos; /* position of the first free entry */
+};
+
+/* The hash table: the table size stored here in order to make resizing easy */
+struct htable {
+ u8 htable_bits; /* size of hash table == 2^htable_bits */
+ struct hbucket bucket[0]; /* hashtable buckets */
+};
+
+#define hbucket(h, i) &((h)->bucket[i])
+
+/* Book-keeping of the prefixes added to the set */
+struct ip_set_hash_nets {
+ u8 cidr; /* the different cidr values in the set */
+ u32 nets; /* number of elements per cidr */
+};
+
+/* The generic ip_set hash structure */
+struct ip_set_hash {
+ struct htable *table; /* the hash table */
+ u32 maxelem; /* max elements in the hash */
+ u32 elements; /* current element (vs timeout) */
+ u32 initval; /* random jhash init value */
+ u32 timeout; /* timeout value, if enabled */
+ struct timer_list gc; /* garbage collection when timeout enabled */
+#ifdef IP_SET_HASH_WITH_NETMASK
+ u8 netmask; /* netmask value for subnets to store */
+#endif
+#ifdef IP_SET_HASH_WITH_NETS
+ struct ip_set_hash_nets nets[0]; /* book-keeping of prefixes */
+#endif
+};
+
+/* Compute htable_bits from the user input parameter hashsize */
+static u8
+htable_bits(u32 hashsize)
+{
+ /* Assume that hashsize == 2^htable_bits */
+ u8 bits = fls(hashsize - 1);
+ if (jhash_size(bits) != hashsize)
+ /* Round up to the first 2^n value */
+ bits = fls(hashsize);
+
+ return bits;
+}
+
+#ifdef IP_SET_HASH_WITH_NETS
+
+#define SET_HOST_MASK(family) (family == AF_INET ? 32 : 128)
+
+/* Network cidr size book keeping when the hash stores different
+ * sized networks */
+static void
+add_cidr(struct ip_set_hash *h, u8 cidr, u8 host_mask)
+{
+ u8 i;
+
+ ++h->nets[cidr-1].nets;
+
+ pr_debug("add_cidr added %u: %u\n", cidr, h->nets[cidr-1].nets);
+
+ if (h->nets[cidr-1].nets > 1)
+ return;
+
+ /* New cidr size */
+ for (i = 0; i < host_mask && h->nets[i].cidr; i++) {
+ /* Add in increasing prefix order, so larger cidr first */
+ if (h->nets[i].cidr < cidr)
+ swap(h->nets[i].cidr, cidr);
+ }
+ if (i < host_mask)
+ h->nets[i].cidr = cidr;
+}
+
+static void
+del_cidr(struct ip_set_hash *h, u8 cidr, u8 host_mask)
+{
+ u8 i;
+
+ --h->nets[cidr-1].nets;
+
+ pr_debug("del_cidr deleted %u: %u\n", cidr, h->nets[cidr-1].nets);
+
+ if (h->nets[cidr-1].nets != 0)
+ return;
+
+ /* All entries with this cidr size deleted, so cleanup h->cidr[] */
+ for (i = 0; i < host_mask - 1 && h->nets[i].cidr; i++) {
+ if (h->nets[i].cidr == cidr)
+ h->nets[i].cidr = cidr = h->nets[i+1].cidr;
+ }
+ h->nets[i - 1].cidr = 0;
+}
+#endif
+
+/* Destroy the hashtable part of the set */
+static void
+ahash_destroy(struct htable *t)
+{
+ struct hbucket *n;
+ u32 i;
+
+ for (i = 0; i < jhash_size(t->htable_bits); i++) {
+ n = hbucket(t, i);
+ if (n->size)
+ /* FIXME: use slab cache */
+ kfree(n->value);
+ }
+
+ ip_set_free(t);
+}
+
+/* Calculate the actual memory size of the set data */
+static size_t
+ahash_memsize(const struct ip_set_hash *h, size_t dsize, u8 host_mask)
+{
+ u32 i;
+ struct htable *t = h->table;
+ size_t memsize = sizeof(*h)
+ + sizeof(*t)
+#ifdef IP_SET_HASH_WITH_NETS
+ + sizeof(struct ip_set_hash_nets) * host_mask
+#endif
+ + jhash_size(t->htable_bits) * sizeof(struct hbucket);
+
+ for (i = 0; i < jhash_size(t->htable_bits); i++)
+ memsize += t->bucket[i].size * dsize;
+
+ return memsize;
+}
+
+/* Flush a hash type of set: destroy all elements */
+static void
+ip_set_hash_flush(struct ip_set *set)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ struct hbucket *n;
+ u32 i;
+
+ for (i = 0; i < jhash_size(t->htable_bits); i++) {
+ n = hbucket(t, i);
+ if (n->size) {
+ n->size = n->pos = 0;
+ /* FIXME: use slab cache */
+ kfree(n->value);
+ }
+ }
+#ifdef IP_SET_HASH_WITH_NETS
+ memset(h->nets, 0, sizeof(struct ip_set_hash_nets)
+ * SET_HOST_MASK(set->family));
+#endif
+ h->elements = 0;
+}
+
+/* Destroy a hash type of set */
+static void
+ip_set_hash_destroy(struct ip_set *set)
+{
+ struct ip_set_hash *h = set->data;
+
+ if (with_timeout(h->timeout))
+ del_timer_sync(&h->gc);
+
+ ahash_destroy(h->table);
+ kfree(h);
+
+ set->data = NULL;
+}
+
+#define HKEY(data, initval, htable_bits) \
+(jhash2((u32 *)(data), sizeof(struct type_pf_elem)/sizeof(u32), initval) \
+ & jhash_mask(htable_bits))
+
+#endif /* _IP_SET_AHASH_H */
+
+#define CONCAT(a, b, c) a##b##c
+#define TOKEN(a, b, c) CONCAT(a, b, c)
+
+/* Type/family dependent function prototypes */
+
+#define type_pf_data_equal TOKEN(TYPE, PF, _data_equal)
+#define type_pf_data_isnull TOKEN(TYPE, PF, _data_isnull)
+#define type_pf_data_copy TOKEN(TYPE, PF, _data_copy)
+#define type_pf_data_zero_out TOKEN(TYPE, PF, _data_zero_out)
+#define type_pf_data_netmask TOKEN(TYPE, PF, _data_netmask)
+#define type_pf_data_list TOKEN(TYPE, PF, _data_list)
+#define type_pf_data_tlist TOKEN(TYPE, PF, _data_tlist)
+
+#define type_pf_elem TOKEN(TYPE, PF, _elem)
+#define type_pf_telem TOKEN(TYPE, PF, _telem)
+#define type_pf_data_timeout TOKEN(TYPE, PF, _data_timeout)
+#define type_pf_data_expired TOKEN(TYPE, PF, _data_expired)
+#define type_pf_data_timeout_set TOKEN(TYPE, PF, _data_timeout_set)
+
+#define type_pf_elem_add TOKEN(TYPE, PF, _elem_add)
+#define type_pf_add TOKEN(TYPE, PF, _add)
+#define type_pf_del TOKEN(TYPE, PF, _del)
+#define type_pf_test_cidrs TOKEN(TYPE, PF, _test_cidrs)
+#define type_pf_test TOKEN(TYPE, PF, _test)
+
+#define type_pf_elem_tadd TOKEN(TYPE, PF, _elem_tadd)
+#define type_pf_del_telem TOKEN(TYPE, PF, _ahash_del_telem)
+#define type_pf_expire TOKEN(TYPE, PF, _expire)
+#define type_pf_tadd TOKEN(TYPE, PF, _tadd)
+#define type_pf_tdel TOKEN(TYPE, PF, _tdel)
+#define type_pf_ttest_cidrs TOKEN(TYPE, PF, _ahash_ttest_cidrs)
+#define type_pf_ttest TOKEN(TYPE, PF, _ahash_ttest)
+
+#define type_pf_resize TOKEN(TYPE, PF, _resize)
+#define type_pf_tresize TOKEN(TYPE, PF, _tresize)
+#define type_pf_flush ip_set_hash_flush
+#define type_pf_destroy ip_set_hash_destroy
+#define type_pf_head TOKEN(TYPE, PF, _head)
+#define type_pf_list TOKEN(TYPE, PF, _list)
+#define type_pf_tlist TOKEN(TYPE, PF, _tlist)
+#define type_pf_same_set TOKEN(TYPE, PF, _same_set)
+#define type_pf_kadt TOKEN(TYPE, PF, _kadt)
+#define type_pf_uadt TOKEN(TYPE, PF, _uadt)
+#define type_pf_gc TOKEN(TYPE, PF, _gc)
+#define type_pf_gc_init TOKEN(TYPE, PF, _gc_init)
+#define type_pf_variant TOKEN(TYPE, PF, _variant)
+#define type_pf_tvariant TOKEN(TYPE, PF, _tvariant)
+
+/* Flavour without timeout */
+
+/* Get the ith element from the array block n */
+#define ahash_data(n, i) \
+ ((struct type_pf_elem *)((n)->value) + (i))
+
+/* Add an element to the hash table when resizing the set:
+ * we spare the maintenance of the internal counters. */
+static int
+type_pf_elem_add(struct hbucket *n, const struct type_pf_elem *value)
+{
+ if (n->pos >= n->size) {
+ void *tmp;
+
+ if (n->size >= AHASH_MAX_SIZE)
+ /* Trigger rehashing */
+ return -EAGAIN;
+
+ tmp = kzalloc((n->size + AHASH_INIT_SIZE)
+ * sizeof(struct type_pf_elem),
+ GFP_ATOMIC);
+ if (!tmp)
+ return -ENOMEM;
+ if (n->size) {
+ memcpy(tmp, n->value,
+ sizeof(struct type_pf_elem) * n->size);
+ kfree(n->value);
+ }
+ n->value = tmp;
+ n->size += AHASH_INIT_SIZE;
+ }
+ type_pf_data_copy(ahash_data(n, n->pos++), value);
+ return 0;
+}
+
+/* Resize a hash: create a new hash table with doubling the hashsize
+ * and inserting the elements to it. Repeat until we succeed or
+ * fail due to memory pressures. */
+static int
+type_pf_resize(struct ip_set *set, bool retried)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t, *orig = h->table;
+ u8 htable_bits = orig->htable_bits;
+ const struct type_pf_elem *data;
+ struct hbucket *n, *m;
+ u32 i, j;
+ int ret;
+
+retry:
+ ret = 0;
+ htable_bits++;
+ pr_debug("attempt to resize set %s from %u to %u, t %p\n",
+ set->name, orig->htable_bits, htable_bits, orig);
+ if (!htable_bits)
+ /* In case we have plenty of memory :-) */
+ return -IPSET_ERR_HASH_FULL;
+ t = ip_set_alloc(sizeof(*t)
+ + jhash_size(htable_bits) * sizeof(struct hbucket));
+ if (!t)
+ return -ENOMEM;
+ t->htable_bits = htable_bits;
+
+ read_lock_bh(&set->lock);
+ for (i = 0; i < jhash_size(orig->htable_bits); i++) {
+ n = hbucket(orig, i);
+ for (j = 0; j < n->pos; j++) {
+ data = ahash_data(n, j);
+ m = hbucket(t, HKEY(data, h->initval, htable_bits));
+ ret = type_pf_elem_add(m, data);
+ if (ret < 0) {
+ read_unlock_bh(&set->lock);
+ ahash_destroy(t);
+ if (ret == -EAGAIN)
+ goto retry;
+ return ret;
+ }
+ }
+ }
+
+ rcu_assign_pointer(h->table, t);
+ read_unlock_bh(&set->lock);
+
+ /* Give time to other readers of the set */
+ synchronize_rcu_bh();
+
+ pr_debug("set %s resized from %u (%p) to %u (%p)\n", set->name,
+ orig->htable_bits, orig, t->htable_bits, t);
+ ahash_destroy(orig);
+
+ return 0;
+}
+
+/* Add an element to a hash and update the internal counters when succeeded,
+ * otherwise report the proper error code. */
+static int
+type_pf_add(struct ip_set *set, void *value, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t;
+ const struct type_pf_elem *d = value;
+ struct hbucket *n;
+ int i, ret = 0;
+ u32 key;
+
+ if (h->elements >= h->maxelem)
+ return -IPSET_ERR_HASH_FULL;
+
+ rcu_read_lock_bh();
+ t = rcu_dereference_bh(h->table);
+ key = HKEY(value, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++)
+ if (type_pf_data_equal(ahash_data(n, i), d)) {
+ ret = -IPSET_ERR_EXIST;
+ goto out;
+ }
+
+ ret = type_pf_elem_add(n, value);
+ if (ret != 0)
+ goto out;
+
+#ifdef IP_SET_HASH_WITH_NETS
+ add_cidr(h, d->cidr, HOST_MASK);
+#endif
+ h->elements++;
+out:
+ rcu_read_unlock_bh();
+ return ret;
+}
+
+/* Delete an element from the hash: swap it with the last element
+ * and free up space if possible.
+ */
+static int
+type_pf_del(struct ip_set *set, void *value, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ const struct type_pf_elem *d = value;
+ struct hbucket *n;
+ int i;
+ struct type_pf_elem *data;
+ u32 key;
+
+ key = HKEY(value, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_data(n, i);
+ if (!type_pf_data_equal(data, d))
+ continue;
+ if (i != n->pos - 1)
+ /* Not last one */
+ type_pf_data_copy(data, ahash_data(n, n->pos - 1));
+
+ n->pos--;
+ h->elements--;
+#ifdef IP_SET_HASH_WITH_NETS
+ del_cidr(h, d->cidr, HOST_MASK);
+#endif
+ if (n->pos + AHASH_INIT_SIZE < n->size) {
+ void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
+ * sizeof(struct type_pf_elem),
+ GFP_ATOMIC);
+ if (!tmp)
+ return 0;
+ n->size -= AHASH_INIT_SIZE;
+ memcpy(tmp, n->value,
+ n->size * sizeof(struct type_pf_elem));
+ kfree(n->value);
+ n->value = tmp;
+ }
+ return 0;
+ }
+
+ return -IPSET_ERR_EXIST;
+}
+
+#ifdef IP_SET_HASH_WITH_NETS
+
+/* Special test function which takes into account the different network
+ * sizes added to the set */
+static int
+type_pf_test_cidrs(struct ip_set *set, struct type_pf_elem *d, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ struct hbucket *n;
+ const struct type_pf_elem *data;
+ int i, j = 0;
+ u32 key;
+ u8 host_mask = SET_HOST_MASK(set->family);
+
+ pr_debug("test by nets\n");
+ for (; j < host_mask && h->nets[j].cidr; j++) {
+ type_pf_data_netmask(d, h->nets[j].cidr);
+ key = HKEY(d, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_data(n, i);
+ if (type_pf_data_equal(data, d))
+ return 1;
+ }
+ }
+ return 0;
+}
+#endif
+
+/* Test whether the element is added to the set */
+static int
+type_pf_test(struct ip_set *set, void *value, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ struct type_pf_elem *d = value;
+ struct hbucket *n;
+ const struct type_pf_elem *data;
+ int i;
+ u32 key;
+
+#ifdef IP_SET_HASH_WITH_NETS
+ /* If we test an IP address and not a network address,
+ * try all possible network sizes */
+ if (d->cidr == SET_HOST_MASK(set->family))
+ return type_pf_test_cidrs(set, d, timeout);
+#endif
+
+ key = HKEY(d, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_data(n, i);
+ if (type_pf_data_equal(data, d))
+ return 1;
+ }
+ return 0;
+}
+
+/* Reply a HEADER request: fill out the header part of the set */
+static int
+type_pf_head(struct ip_set *set, struct sk_buff *skb)
+{
+ const struct ip_set_hash *h = set->data;
+ struct nlattr *nested;
+ size_t memsize;
+
+ read_lock_bh(&set->lock);
+ memsize = ahash_memsize(h, with_timeout(h->timeout)
+ ? sizeof(struct type_pf_telem)
+ : sizeof(struct type_pf_elem),
+ set->family == AF_INET ? 32 : 128);
+ read_unlock_bh(&set->lock);
+
+ nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+ if (!nested)
+ goto nla_put_failure;
+ NLA_PUT_NET32(skb, IPSET_ATTR_HASHSIZE,
+ htonl(jhash_size(h->table->htable_bits)));
+ NLA_PUT_NET32(skb, IPSET_ATTR_MAXELEM, htonl(h->maxelem));
+#ifdef IP_SET_HASH_WITH_NETMASK
+ if (h->netmask != HOST_MASK)
+ NLA_PUT_U8(skb, IPSET_ATTR_NETMASK, h->netmask);
+#endif
+ NLA_PUT_NET32(skb, IPSET_ATTR_REFERENCES,
+ htonl(atomic_read(&set->ref) - 1));
+ NLA_PUT_NET32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize));
+ if (with_timeout(h->timeout))
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT, htonl(h->timeout));
+ ipset_nest_end(skb, nested);
+
+ return 0;
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+/* Reply a LIST/SAVE request: dump the elements of the specified set */
+static int
+type_pf_list(const struct ip_set *set,
+ struct sk_buff *skb, struct netlink_callback *cb)
+{
+ const struct ip_set_hash *h = set->data;
+ const struct htable *t = h->table;
+ struct nlattr *atd, *nested;
+ const struct hbucket *n;
+ const struct type_pf_elem *data;
+ u32 first = cb->args[2];
+ /* We assume that one hash bucket fills into one page */
+ void *incomplete;
+ int i;
+
+ atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+ if (!atd)
+ return -EMSGSIZE;
+ pr_debug("list hash set %s\n", set->name);
+ for (; cb->args[2] < jhash_size(t->htable_bits); cb->args[2]++) {
+ incomplete = skb_tail_pointer(skb);
+ n = hbucket(t, cb->args[2]);
+ pr_debug("cb->args[2]: %lu, t %p n %p\n", cb->args[2], t, n);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_data(n, i);
+ pr_debug("list hash %lu hbucket %p i %u, data %p\n",
+ cb->args[2], n, i, data);
+ nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+ if (!nested) {
+ if (cb->args[2] == first) {
+ nla_nest_cancel(skb, atd);
+ return -EMSGSIZE;
+ } else
+ goto nla_put_failure;
+ }
+ if (type_pf_data_list(skb, data))
+ goto nla_put_failure;
+ ipset_nest_end(skb, nested);
+ }
+ }
+ ipset_nest_end(skb, atd);
+ /* Set listing finished */
+ cb->args[2] = 0;
+
+ return 0;
+
+nla_put_failure:
+ nlmsg_trim(skb, incomplete);
+ ipset_nest_end(skb, atd);
+ if (unlikely(first == cb->args[2])) {
+ pr_warning("Can't list set %s: one bucket does not fit into "
+ "a message. Please report it!\n", set->name);
+ cb->args[2] = 0;
+ return -EMSGSIZE;
+ }
+ return 0;
+}
+
+static int
+type_pf_kadt(struct ip_set *set, const struct sk_buff * skb,
+ enum ipset_adt adt, u8 pf, u8 dim, u8 flags);
+static int
+type_pf_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags);
+
+static const struct ip_set_type_variant type_pf_variant = {
+ .kadt = type_pf_kadt,
+ .uadt = type_pf_uadt,
+ .adt = {
+ [IPSET_ADD] = type_pf_add,
+ [IPSET_DEL] = type_pf_del,
+ [IPSET_TEST] = type_pf_test,
+ },
+ .destroy = type_pf_destroy,
+ .flush = type_pf_flush,
+ .head = type_pf_head,
+ .list = type_pf_list,
+ .resize = type_pf_resize,
+ .same_set = type_pf_same_set,
+};
+
+/* Flavour with timeout support */
+
+#define ahash_tdata(n, i) \
+ (struct type_pf_elem *)((struct type_pf_telem *)((n)->value) + (i))
+
+static inline u32
+type_pf_data_timeout(const struct type_pf_elem *data)
+{
+ const struct type_pf_telem *tdata =
+ (const struct type_pf_telem *) data;
+
+ return tdata->timeout;
+}
+
+static inline bool
+type_pf_data_expired(const struct type_pf_elem *data)
+{
+ const struct type_pf_telem *tdata =
+ (const struct type_pf_telem *) data;
+
+ return ip_set_timeout_expired(tdata->timeout);
+}
+
+static inline void
+type_pf_data_timeout_set(struct type_pf_elem *data, u32 timeout)
+{
+ struct type_pf_telem *tdata = (struct type_pf_telem *) data;
+
+ tdata->timeout = ip_set_timeout_set(timeout);
+}
+
+static int
+type_pf_elem_tadd(struct hbucket *n, const struct type_pf_elem *value,
+ u32 timeout)
+{
+ struct type_pf_elem *data;
+
+ if (n->pos >= n->size) {
+ void *tmp;
+
+ if (n->size >= AHASH_MAX_SIZE)
+ /* Trigger rehashing */
+ return -EAGAIN;
+
+ tmp = kzalloc((n->size + AHASH_INIT_SIZE)
+ * sizeof(struct type_pf_telem),
+ GFP_ATOMIC);
+ if (!tmp)
+ return -ENOMEM;
+ if (n->size) {
+ memcpy(tmp, n->value,
+ sizeof(struct type_pf_telem) * n->size);
+ kfree(n->value);
+ }
+ n->value = tmp;
+ n->size += AHASH_INIT_SIZE;
+ }
+ data = ahash_tdata(n, n->pos++);
+ type_pf_data_copy(data, value);
+ type_pf_data_timeout_set(data, timeout);
+ return 0;
+}
+
+/* Delete expired elements from the hashtable */
+static void
+type_pf_expire(struct ip_set_hash *h)
+{
+ struct htable *t = h->table;
+ struct hbucket *n;
+ struct type_pf_elem *data;
+ u32 i;
+ int j;
+
+ for (i = 0; i < jhash_size(t->htable_bits); i++) {
+ n = hbucket(t, i);
+ for (j = 0; j < n->pos; j++) {
+ data = ahash_tdata(n, j);
+ if (type_pf_data_expired(data)) {
+ pr_debug("expired %u/%u\n", i, j);
+#ifdef IP_SET_HASH_WITH_NETS
+ del_cidr(h, data->cidr, HOST_MASK);
+#endif
+ if (j != n->pos - 1)
+ /* Not last one */
+ type_pf_data_copy(data,
+ ahash_tdata(n, n->pos - 1));
+ n->pos--;
+ h->elements--;
+ }
+ }
+ if (n->pos + AHASH_INIT_SIZE < n->size) {
+ void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
+ * sizeof(struct type_pf_telem),
+ GFP_ATOMIC);
+ if (!tmp)
+ /* Still try to delete expired elements */
+ continue;
+ n->size -= AHASH_INIT_SIZE;
+ memcpy(tmp, n->value,
+ n->size * sizeof(struct type_pf_telem));
+ kfree(n->value);
+ n->value = tmp;
+ }
+ }
+}
+
+static int
+type_pf_tresize(struct ip_set *set, bool retried)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t, *orig = h->table;
+ u8 htable_bits = orig->htable_bits;
+ const struct type_pf_elem *data;
+ struct hbucket *n, *m;
+ u32 i, j;
+ int ret;
+
+ /* Try to cleanup once */
+ if (!retried) {
+ i = h->elements;
+ write_lock_bh(&set->lock);
+ type_pf_expire(set->data);
+ write_unlock_bh(&set->lock);
+ if (h->elements < i)
+ return 0;
+ }
+
+retry:
+ ret = 0;
+ htable_bits++;
+ if (!htable_bits)
+ /* In case we have plenty of memory :-) */
+ return -IPSET_ERR_HASH_FULL;
+ t = ip_set_alloc(sizeof(*t)
+ + jhash_size(htable_bits) * sizeof(struct hbucket));
+ if (!t)
+ return -ENOMEM;
+ t->htable_bits = htable_bits;
+
+ read_lock_bh(&set->lock);
+ for (i = 0; i < jhash_size(orig->htable_bits); i++) {
+ n = hbucket(orig, i);
+ for (j = 0; j < n->pos; j++) {
+ data = ahash_tdata(n, j);
+ m = hbucket(t, HKEY(data, h->initval, htable_bits));
+ ret = type_pf_elem_tadd(m, data,
+ type_pf_data_timeout(data));
+ if (ret < 0) {
+ read_unlock_bh(&set->lock);
+ ahash_destroy(t);
+ if (ret == -EAGAIN)
+ goto retry;
+ return ret;
+ }
+ }
+ }
+
+ rcu_assign_pointer(h->table, t);
+ read_unlock_bh(&set->lock);
+
+ /* Give time to other readers of the set */
+ synchronize_rcu_bh();
+
+ ahash_destroy(orig);
+
+ return 0;
+}
+
+static int
+type_pf_tadd(struct ip_set *set, void *value, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ const struct type_pf_elem *d = value;
+ struct hbucket *n;
+ struct type_pf_elem *data;
+ int ret = 0, i, j = AHASH_MAX_SIZE + 1;
+ u32 key;
+
+ if (h->elements >= h->maxelem)
+ /* FIXME: when set is full, we slow down here */
+ type_pf_expire(h);
+ if (h->elements >= h->maxelem)
+ return -IPSET_ERR_HASH_FULL;
+
+ rcu_read_lock_bh();
+ t = rcu_dereference_bh(h->table);
+ key = HKEY(d, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_tdata(n, i);
+ if (type_pf_data_equal(data, d)) {
+ if (type_pf_data_expired(data))
+ j = i;
+ else {
+ ret = -IPSET_ERR_EXIST;
+ goto out;
+ }
+ } else if (j == AHASH_MAX_SIZE + 1 &&
+ type_pf_data_expired(data))
+ j = i;
+ }
+ if (j != AHASH_MAX_SIZE + 1) {
+ data = ahash_tdata(n, j);
+#ifdef IP_SET_HASH_WITH_NETS
+ del_cidr(h, data->cidr, HOST_MASK);
+ add_cidr(h, d->cidr, HOST_MASK);
+#endif
+ type_pf_data_copy(data, d);
+ type_pf_data_timeout_set(data, timeout);
+ goto out;
+ }
+ ret = type_pf_elem_tadd(n, d, timeout);
+ if (ret != 0)
+ goto out;
+
+#ifdef IP_SET_HASH_WITH_NETS
+ add_cidr(h, d->cidr, HOST_MASK);
+#endif
+ h->elements++;
+out:
+ rcu_read_unlock_bh();
+ return ret;
+}
+
+static int
+type_pf_tdel(struct ip_set *set, void *value, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ const struct type_pf_elem *d = value;
+ struct hbucket *n;
+ int i, ret = 0;
+ struct type_pf_elem *data;
+ u32 key;
+
+ key = HKEY(value, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_tdata(n, i);
+ if (!type_pf_data_equal(data, d))
+ continue;
+ if (type_pf_data_expired(data))
+ ret = -IPSET_ERR_EXIST;
+ if (i != n->pos - 1)
+ /* Not last one */
+ type_pf_data_copy(data, ahash_tdata(n, n->pos - 1));
+
+ n->pos--;
+ h->elements--;
+#ifdef IP_SET_HASH_WITH_NETS
+ del_cidr(h, d->cidr, HOST_MASK);
+#endif
+ if (n->pos + AHASH_INIT_SIZE < n->size) {
+ void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
+ * sizeof(struct type_pf_telem),
+ GFP_ATOMIC);
+ if (!tmp)
+ return 0;
+ n->size -= AHASH_INIT_SIZE;
+ memcpy(tmp, n->value,
+ n->size * sizeof(struct type_pf_telem));
+ kfree(n->value);
+ n->value = tmp;
+ }
+ return 0;
+ }
+
+ return -IPSET_ERR_EXIST;
+}
+
+#ifdef IP_SET_HASH_WITH_NETS
+static int
+type_pf_ttest_cidrs(struct ip_set *set, struct type_pf_elem *d, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ struct type_pf_elem *data;
+ struct hbucket *n;
+ int i, j = 0;
+ u32 key;
+ u8 host_mask = SET_HOST_MASK(set->family);
+
+ for (; j < host_mask && h->nets[j].cidr; j++) {
+ type_pf_data_netmask(d, h->nets[j].cidr);
+ key = HKEY(d, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_tdata(n, i);
+ if (type_pf_data_equal(data, d))
+ return !type_pf_data_expired(data);
+ }
+ }
+ return 0;
+}
+#endif
+
+static int
+type_pf_ttest(struct ip_set *set, void *value, u32 timeout)
+{
+ struct ip_set_hash *h = set->data;
+ struct htable *t = h->table;
+ struct type_pf_elem *data, *d = value;
+ struct hbucket *n;
+ int i;
+ u32 key;
+
+#ifdef IP_SET_HASH_WITH_NETS
+ if (d->cidr == SET_HOST_MASK(set->family))
+ return type_pf_ttest_cidrs(set, d, timeout);
+#endif
+ key = HKEY(d, h->initval, t->htable_bits);
+ n = hbucket(t, key);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_tdata(n, i);
+ if (type_pf_data_equal(data, d))
+ return !type_pf_data_expired(data);
+ }
+ return 0;
+}
+
+static int
+type_pf_tlist(const struct ip_set *set,
+ struct sk_buff *skb, struct netlink_callback *cb)
+{
+ const struct ip_set_hash *h = set->data;
+ const struct htable *t = h->table;
+ struct nlattr *atd, *nested;
+ const struct hbucket *n;
+ const struct type_pf_elem *data;
+ u32 first = cb->args[2];
+ /* We assume that one hash bucket fills into one page */
+ void *incomplete;
+ int i;
+
+ atd = ipset_nest_start(skb, IPSET_ATTR_ADT);
+ if (!atd)
+ return -EMSGSIZE;
+ for (; cb->args[2] < jhash_size(t->htable_bits); cb->args[2]++) {
+ incomplete = skb_tail_pointer(skb);
+ n = hbucket(t, cb->args[2]);
+ for (i = 0; i < n->pos; i++) {
+ data = ahash_tdata(n, i);
+ pr_debug("list %p %u\n", n, i);
+ if (type_pf_data_expired(data))
+ continue;
+ pr_debug("do list %p %u\n", n, i);
+ nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
+ if (!nested) {
+ if (cb->args[2] == first) {
+ nla_nest_cancel(skb, atd);
+ return -EMSGSIZE;
+ } else
+ goto nla_put_failure;
+ }
+ if (type_pf_data_tlist(skb, data))
+ goto nla_put_failure;
+ ipset_nest_end(skb, nested);
+ }
+ }
+ ipset_nest_end(skb, atd);
+ /* Set listing finished */
+ cb->args[2] = 0;
+
+ return 0;
+
+nla_put_failure:
+ nlmsg_trim(skb, incomplete);
+ ipset_nest_end(skb, atd);
+ if (unlikely(first == cb->args[2])) {
+ pr_warning("Can't list set %s: one bucket does not fit into "
+ "a message. Please report it!\n", set->name);
+ cb->args[2] = 0;
+ return -EMSGSIZE;
+ }
+ return 0;
+}
+
+static const struct ip_set_type_variant type_pf_tvariant = {
+ .kadt = type_pf_kadt,
+ .uadt = type_pf_uadt,
+ .adt = {
+ [IPSET_ADD] = type_pf_tadd,
+ [IPSET_DEL] = type_pf_tdel,
+ [IPSET_TEST] = type_pf_ttest,
+ },
+ .destroy = type_pf_destroy,
+ .flush = type_pf_flush,
+ .head = type_pf_head,
+ .list = type_pf_tlist,
+ .resize = type_pf_tresize,
+ .same_set = type_pf_same_set,
+};
+
+static void
+type_pf_gc(unsigned long ul_set)
+{
+ struct ip_set *set = (struct ip_set *) ul_set;
+ struct ip_set_hash *h = set->data;
+
+ pr_debug("called\n");
+ write_lock_bh(&set->lock);
+ type_pf_expire(h);
+ write_unlock_bh(&set->lock);
+
+ h->gc.expires = jiffies + IPSET_GC_PERIOD(h->timeout) * HZ;
+ add_timer(&h->gc);
+}
+
+static void
+type_pf_gc_init(struct ip_set *set)
+{
+ struct ip_set_hash *h = set->data;
+
+ init_timer(&h->gc);
+ h->gc.data = (unsigned long) set;
+ h->gc.function = type_pf_gc;
+ h->gc.expires = jiffies + IPSET_GC_PERIOD(h->timeout) * HZ;
+ add_timer(&h->gc);
+ pr_debug("gc initialized, run in every %u\n",
+ IPSET_GC_PERIOD(h->timeout));
+}
+
+#undef type_pf_data_equal
+#undef type_pf_data_isnull
+#undef type_pf_data_copy
+#undef type_pf_data_zero_out
+#undef type_pf_data_list
+#undef type_pf_data_tlist
+
+#undef type_pf_elem
+#undef type_pf_telem
+#undef type_pf_data_timeout
+#undef type_pf_data_expired
+#undef type_pf_data_netmask
+#undef type_pf_data_timeout_set
+
+#undef type_pf_elem_add
+#undef type_pf_add
+#undef type_pf_del
+#undef type_pf_test_cidrs
+#undef type_pf_test
+
+#undef type_pf_elem_tadd
+#undef type_pf_expire
+#undef type_pf_tadd
+#undef type_pf_tdel
+#undef type_pf_ttest_cidrs
+#undef type_pf_ttest
+
+#undef type_pf_resize
+#undef type_pf_tresize
+#undef type_pf_flush
+#undef type_pf_destroy
+#undef type_pf_head
+#undef type_pf_list
+#undef type_pf_tlist
+#undef type_pf_same_set
+#undef type_pf_kadt
+#undef type_pf_uadt
+#undef type_pf_gc
+#undef type_pf_gc_init
+#undef type_pf_variant
+#undef type_pf_tvariant
--- /dev/null
+/* Copyright (C) 2003-2011 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.
+ */
+
+/* Kernel module implementing an IP set type: the hash:ip type */
+
+#include <linux/jhash.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/uaccess.h>
+#include <linux/bitops.h>
+#include <linux/spinlock.h>
+#include <linux/random.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/netlink.h>
+#include <net/tcp.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/ipset/pfxlen.h>
+#include <linux/netfilter/ipset/ip_set.h>
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
+MODULE_DESCRIPTION("hash:ip type of IP sets");
+MODULE_ALIAS("ip_set_hash:ip");
+
+/* Type specific function prefix */
+#define TYPE hash_ip
+
+static bool
+hash_ip_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_ip4_same_set hash_ip_same_set
+#define hash_ip6_same_set hash_ip_same_set
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_ip4_elem {
+ __be32 ip;
+};
+
+/* Member elements with timeout support */
+struct hash_ip4_telem {
+ __be32 ip;
+ unsigned long timeout;
+};
+
+static inline bool
+hash_ip4_data_equal(const struct hash_ip4_elem *ip1,
+ const struct hash_ip4_elem *ip2)
+{
+ return ip1->ip == ip2->ip;
+}
+
+static inline bool
+hash_ip4_data_isnull(const struct hash_ip4_elem *elem)
+{
+ return elem->ip == 0;
+}
+
+static inline void
+hash_ip4_data_copy(struct hash_ip4_elem *dst, const struct hash_ip4_elem *src)
+{
+ dst->ip = src->ip;
+}
+
+/* Zero valued IP addresses cannot be stored */
+static inline void
+hash_ip4_data_zero_out(struct hash_ip4_elem *elem)
+{
+ elem->ip = 0;
+}
+
+static inline bool
+hash_ip4_data_list(struct sk_buff *skb, const struct hash_ip4_elem *data)
+{
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static bool
+hash_ip4_data_tlist(struct sk_buff *skb, const struct hash_ip4_elem *data)
+{
+ const struct hash_ip4_telem *tdata =
+ (const struct hash_ip4_telem *)data;
+
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, tdata->ip);
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(ip_set_timeout_get(tdata->timeout)));
+
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+#define IP_SET_HASH_WITH_NETMASK
+#define PF 4
+#define HOST_MASK 32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ip4_kadt(struct ip_set *set, const struct sk_buff *skb,
+ enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ __be32 ip;
+
+ ip4addrptr(skb, flags & IPSET_DIM_ONE_SRC, &ip);
+ ip &= ip_set_netmask(h->netmask);
+ if (ip == 0)
+ return -EINVAL;
+
+ return adtfn(set, &ip, h->timeout);
+}
+
+static int
+hash_ip4_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ u32 ip, ip_to, hosts, timeout = h->timeout;
+ __be32 nip;
+ int ret = 0;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
+ if (ret)
+ return ret;
+
+ ip &= ip_set_hostmask(h->netmask);
+
+ if (tb[IPSET_ATTR_TIMEOUT]) {
+ if (!with_timeout(h->timeout))
+ return -IPSET_ERR_TIMEOUT;
+ timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+ }
+
+ if (adt == IPSET_TEST) {
+ nip = htonl(ip);
+ if (nip == 0)
+ return -IPSET_ERR_HASH_ELEM;
+ return adtfn(set, &nip, timeout);
+ }
+
+ if (tb[IPSET_ATTR_IP_TO]) {
+ ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
+ if (ret)
+ return ret;
+ if (ip > ip_to)
+ swap(ip, ip_to);
+ } else if (tb[IPSET_ATTR_CIDR]) {
+ u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+ if (cidr > 32)
+ return -IPSET_ERR_INVALID_CIDR;
+ ip &= ip_set_hostmask(cidr);
+ ip_to = ip | ~ip_set_hostmask(cidr);
+ } else
+ ip_to = ip;
+
+ hosts = h->netmask == 32 ? 1 : 2 << (32 - h->netmask - 1);
+
+ for (; !before(ip_to, ip); ip += hosts) {
+ nip = htonl(ip);
+ if (nip == 0)
+ return -IPSET_ERR_HASH_ELEM;
+ ret = adtfn(set, &nip, timeout);
+
+ if (ret && !ip_set_eexist(ret, flags))
+ return ret;
+ else
+ ret = 0;
+ }
+ return ret;
+}
+
+static bool
+hash_ip_same_set(const struct ip_set *a, const struct ip_set *b)
+{
+ const struct ip_set_hash *x = a->data;
+ const struct ip_set_hash *y = b->data;
+
+ /* Resizing changes htable_bits, so we ignore it */
+ return x->maxelem == y->maxelem &&
+ x->timeout == y->timeout &&
+ x->netmask == y->netmask;
+}
+
+/* The type variant functions: IPv6 */
+
+struct hash_ip6_elem {
+ union nf_inet_addr ip;
+};
+
+struct hash_ip6_telem {
+ union nf_inet_addr ip;
+ unsigned long timeout;
+};
+
+static inline bool
+hash_ip6_data_equal(const struct hash_ip6_elem *ip1,
+ const struct hash_ip6_elem *ip2)
+{
+ return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0;
+}
+
+static inline bool
+hash_ip6_data_isnull(const struct hash_ip6_elem *elem)
+{
+ return ipv6_addr_any(&elem->ip.in6);
+}
+
+static inline void
+hash_ip6_data_copy(struct hash_ip6_elem *dst, const struct hash_ip6_elem *src)
+{
+ ipv6_addr_copy(&dst->ip.in6, &src->ip.in6);
+}
+
+static inline void
+hash_ip6_data_zero_out(struct hash_ip6_elem *elem)
+{
+ ipv6_addr_set(&elem->ip.in6, 0, 0, 0, 0);
+}
+
+static inline void
+ip6_netmask(union nf_inet_addr *ip, u8 prefix)
+{
+ ip->ip6[0] &= ip_set_netmask6(prefix)[0];
+ ip->ip6[1] &= ip_set_netmask6(prefix)[1];
+ ip->ip6[2] &= ip_set_netmask6(prefix)[2];
+ ip->ip6[3] &= ip_set_netmask6(prefix)[3];
+}
+
+static bool
+hash_ip6_data_list(struct sk_buff *skb, const struct hash_ip6_elem *data)
+{
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static bool
+hash_ip6_data_tlist(struct sk_buff *skb, const struct hash_ip6_elem *data)
+{
+ const struct hash_ip6_telem *e =
+ (const struct hash_ip6_telem *)data;
+
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(ip_set_timeout_get(e->timeout)));
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+#undef PF
+#undef HOST_MASK
+
+#define PF 6
+#define HOST_MASK 128
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static int
+hash_ip6_kadt(struct ip_set *set, const struct sk_buff *skb,
+ enum ipset_adt adt, u8 pf, u8 dim, u8 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ union nf_inet_addr ip;
+
+ ip6addrptr(skb, flags & IPSET_DIM_ONE_SRC, &ip.in6);
+ ip6_netmask(&ip, h->netmask);
+ if (ipv6_addr_any(&ip.in6))
+ return -EINVAL;
+
+ return adtfn(set, &ip, h->timeout);
+}
+
+static const struct nla_policy hash_ip6_adt_policy[IPSET_ATTR_ADT_MAX + 1] = {
+ [IPSET_ATTR_IP] = { .type = NLA_NESTED },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
+};
+
+static int
+hash_ip6_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags)
+{
+ const struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ union nf_inet_addr ip;
+ u32 timeout = h->timeout;
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+ tb[IPSET_ATTR_IP_TO] ||
+ tb[IPSET_ATTR_CIDR]))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &ip);
+ if (ret)
+ return ret;
+
+ ip6_netmask(&ip, h->netmask);
+ if (ipv6_addr_any(&ip.in6))
+ return -IPSET_ERR_HASH_ELEM;
+
+ if (tb[IPSET_ATTR_TIMEOUT]) {
+ if (!with_timeout(h->timeout))
+ return -IPSET_ERR_TIMEOUT;
+ timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+ }
+
+ ret = adtfn(set, &ip, timeout);
+
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_ip_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+ u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+ u8 netmask, hbits;
+ struct ip_set_hash *h;
+
+ if (!(set->family == AF_INET || set->family == AF_INET6))
+ return -IPSET_ERR_INVALID_FAMILY;
+ netmask = set->family == AF_INET ? 32 : 128;
+ pr_debug("Create set %s with family %s\n",
+ set->name, set->family == AF_INET ? "inet" : "inet6");
+
+ if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_HASHSIZE]) {
+ hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
+ if (hashsize < IPSET_MIMINAL_HASHSIZE)
+ hashsize = IPSET_MIMINAL_HASHSIZE;
+ }
+
+ if (tb[IPSET_ATTR_MAXELEM])
+ maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
+
+ if (tb[IPSET_ATTR_NETMASK]) {
+ netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]);
+
+ if ((set->family == AF_INET && netmask > 32) ||
+ (set->family == AF_INET6 && netmask > 128) ||
+ netmask == 0)
+ return -IPSET_ERR_INVALID_NETMASK;
+ }
+
+ h = kzalloc(sizeof(*h), GFP_KERNEL);
+ if (!h)
+ return -ENOMEM;
+
+ h->maxelem = maxelem;
+ h->netmask = netmask;
+ get_random_bytes(&h->initval, sizeof(h->initval));
+ h->timeout = IPSET_NO_TIMEOUT;
+
+ hbits = htable_bits(hashsize);
+ h->table = ip_set_alloc(
+ sizeof(struct htable)
+ + jhash_size(hbits) * sizeof(struct hbucket));
+ if (!h->table) {
+ kfree(h);
+ return -ENOMEM;
+ }
+ h->table->htable_bits = hbits;
+
+ set->data = h;
+
+ if (tb[IPSET_ATTR_TIMEOUT]) {
+ h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+
+ set->variant = set->family == AF_INET
+ ? &hash_ip4_tvariant : &hash_ip6_tvariant;
+
+ if (set->family == AF_INET)
+ hash_ip4_gc_init(set);
+ else
+ hash_ip6_gc_init(set);
+ } else {
+ set->variant = set->family == AF_INET
+ ? &hash_ip4_variant : &hash_ip6_variant;
+ }
+
+ pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
+ set->name, jhash_size(h->table->htable_bits),
+ h->table->htable_bits, h->maxelem, set->data, h->table);
+
+ return 0;
+}
+
+static struct ip_set_type hash_ip_type __read_mostly = {
+ .name = "hash:ip",
+ .protocol = IPSET_PROTOCOL,
+ .features = IPSET_TYPE_IP,
+ .dimension = IPSET_DIM_ONE,
+ .family = AF_UNSPEC,
+ .revision = 0,
+ .create = hash_ip_create,
+ .create_policy = {
+ [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
+ [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
+ [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
+ [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_NETMASK] = { .type = NLA_U8 },
+ },
+ .adt_policy = {
+ [IPSET_ATTR_IP] = { .type = NLA_NESTED },
+ [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
+ [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
+ },
+ .me = THIS_MODULE,
+};
+
+static int __init
+hash_ip_init(void)
+{
+ return ip_set_type_register(&hash_ip_type);
+}
+
+static void __exit
+hash_ip_fini(void)
+{
+ ip_set_type_unregister(&hash_ip_type);
+}
+
+module_init(hash_ip_init);
+module_exit(hash_ip_fini);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff