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Date: Mon, 10 May 2010 22:18:19 +0200
From: kaber@...sh.net
To: davem@...emloft.net
Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 48/84] netfilter: xtables: remove xt_hashlimit revision 0
From: Jan Engelhardt <jengelh@...ozas.de>
Superseded by xt_hashlimit revision 1 (linux v2.6.24-6212-g09e410d,
iptables 1.4.1-rc1).
Signed-off-by: Jan Engelhardt <jengelh@...ozas.de>
---
net/netfilter/xt_hashlimit.c | 221 ------------------------------------------
1 files changed, 0 insertions(+), 221 deletions(-)
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index c89fde7..5470bb0 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -193,76 +193,6 @@ dsthash_free(struct xt_hashlimit_htable *ht, struct dsthash_ent *ent)
}
static void htable_gc(unsigned long htlong);
-static int htable_create_v0(struct net *net, struct xt_hashlimit_info *minfo, u_int8_t family)
-{
- struct hashlimit_net *hashlimit_net = hashlimit_pernet(net);
- struct xt_hashlimit_htable *hinfo;
- unsigned int size;
- unsigned int i;
-
- if (minfo->cfg.size)
- size = minfo->cfg.size;
- else {
- size = ((totalram_pages << PAGE_SHIFT) / 16384) /
- sizeof(struct list_head);
- if (totalram_pages > (1024 * 1024 * 1024 / PAGE_SIZE))
- size = 8192;
- if (size < 16)
- size = 16;
- }
- /* FIXME: don't use vmalloc() here or anywhere else -HW */
- hinfo = vmalloc(sizeof(struct xt_hashlimit_htable) +
- sizeof(struct list_head) * size);
- if (!hinfo)
- return -ENOMEM;
- minfo->hinfo = hinfo;
-
- /* copy match config into hashtable config */
- hinfo->cfg.mode = minfo->cfg.mode;
- hinfo->cfg.avg = minfo->cfg.avg;
- hinfo->cfg.burst = minfo->cfg.burst;
- hinfo->cfg.max = minfo->cfg.max;
- hinfo->cfg.gc_interval = minfo->cfg.gc_interval;
- hinfo->cfg.expire = minfo->cfg.expire;
-
- if (family == NFPROTO_IPV4)
- hinfo->cfg.srcmask = hinfo->cfg.dstmask = 32;
- else
- hinfo->cfg.srcmask = hinfo->cfg.dstmask = 128;
-
- hinfo->cfg.size = size;
- if (!hinfo->cfg.max)
- hinfo->cfg.max = 8 * hinfo->cfg.size;
- else if (hinfo->cfg.max < hinfo->cfg.size)
- hinfo->cfg.max = hinfo->cfg.size;
-
- for (i = 0; i < hinfo->cfg.size; i++)
- INIT_HLIST_HEAD(&hinfo->hash[i]);
-
- hinfo->use = 1;
- hinfo->count = 0;
- hinfo->family = family;
- hinfo->rnd_initialized = false;
- spin_lock_init(&hinfo->lock);
- hinfo->pde = proc_create_data(minfo->name, 0,
- (family == NFPROTO_IPV4) ?
- hashlimit_net->ipt_hashlimit : hashlimit_net->ip6t_hashlimit,
- &dl_file_ops, hinfo);
- if (!hinfo->pde) {
- vfree(hinfo);
- return -ENOMEM;
- }
- hinfo->net = net;
-
- setup_timer(&hinfo->timer, htable_gc, (unsigned long )hinfo);
- hinfo->timer.expires = jiffies + msecs_to_jiffies(hinfo->cfg.gc_interval);
- add_timer(&hinfo->timer);
-
- hlist_add_head(&hinfo->node, &hashlimit_net->htables);
-
- return 0;
-}
-
static int htable_create(struct net *net, struct xt_hashlimit_mtinfo1 *minfo,
u_int8_t family)
{
@@ -571,57 +501,6 @@ hashlimit_init_dst(const struct xt_hashlimit_htable *hinfo,
}
static bool
-hashlimit_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
-{
- const struct xt_hashlimit_info *r = par->matchinfo;
- struct xt_hashlimit_htable *hinfo = r->hinfo;
- unsigned long now = jiffies;
- struct dsthash_ent *dh;
- struct dsthash_dst dst;
-
- if (hashlimit_init_dst(hinfo, &dst, skb, par->thoff) < 0)
- goto hotdrop;
-
- spin_lock_bh(&hinfo->lock);
- dh = dsthash_find(hinfo, &dst);
- if (!dh) {
- dh = dsthash_alloc_init(hinfo, &dst);
- if (!dh) {
- spin_unlock_bh(&hinfo->lock);
- goto hotdrop;
- }
-
- dh->expires = jiffies + msecs_to_jiffies(hinfo->cfg.expire);
- dh->rateinfo.prev = jiffies;
- dh->rateinfo.credit = user2credits(hinfo->cfg.avg *
- hinfo->cfg.burst);
- dh->rateinfo.credit_cap = user2credits(hinfo->cfg.avg *
- hinfo->cfg.burst);
- dh->rateinfo.cost = user2credits(hinfo->cfg.avg);
- } else {
- /* update expiration timeout */
- dh->expires = now + msecs_to_jiffies(hinfo->cfg.expire);
- rateinfo_recalc(dh, now);
- }
-
- if (dh->rateinfo.credit >= dh->rateinfo.cost) {
- /* We're underlimit. */
- dh->rateinfo.credit -= dh->rateinfo.cost;
- spin_unlock_bh(&hinfo->lock);
- return true;
- }
-
- spin_unlock_bh(&hinfo->lock);
-
- /* default case: we're overlimit, thus don't match */
- return false;
-
-hotdrop:
- *par->hotdrop = true;
- return false;
-}
-
-static bool
hashlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct xt_hashlimit_mtinfo1 *info = par->matchinfo;
@@ -671,45 +550,6 @@ hashlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
return false;
}
-static int hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
-{
- struct net *net = par->net;
- struct xt_hashlimit_info *r = par->matchinfo;
- int ret;
-
- /* Check for overflow. */
- if (r->cfg.burst == 0 ||
- user2credits(r->cfg.avg * r->cfg.burst) < user2credits(r->cfg.avg)) {
- pr_info("overflow, try lower: %u/%u\n",
- r->cfg.avg, r->cfg.burst);
- return -ERANGE;
- }
- if (r->cfg.mode == 0 ||
- r->cfg.mode > (XT_HASHLIMIT_HASH_DPT |
- XT_HASHLIMIT_HASH_DIP |
- XT_HASHLIMIT_HASH_SIP |
- XT_HASHLIMIT_HASH_SPT))
- return -EINVAL;
- if (!r->cfg.gc_interval)
- return -EINVAL;
- if (!r->cfg.expire)
- return -EINVAL;
- if (r->name[sizeof(r->name) - 1] != '\0')
- return -EINVAL;
-
- mutex_lock(&hashlimit_mutex);
- r->hinfo = htable_find_get(net, r->name, par->family);
- if (r->hinfo == NULL) {
- ret = htable_create_v0(net, r, par->family);
- if (ret < 0) {
- mutex_unlock(&hashlimit_mutex);
- return ret;
- }
- }
- mutex_unlock(&hashlimit_mutex);
- return 0;
-}
-
static int hashlimit_mt_check(const struct xt_mtchk_param *par)
{
struct net *net = par->net;
@@ -749,14 +589,6 @@ static int hashlimit_mt_check(const struct xt_mtchk_param *par)
return 0;
}
-static void
-hashlimit_mt_destroy_v0(const struct xt_mtdtor_param *par)
-{
- const struct xt_hashlimit_info *r = par->matchinfo;
-
- htable_put(r->hinfo);
-}
-
static void hashlimit_mt_destroy(const struct xt_mtdtor_param *par)
{
const struct xt_hashlimit_mtinfo1 *info = par->matchinfo;
@@ -764,47 +596,8 @@ static void hashlimit_mt_destroy(const struct xt_mtdtor_param *par)
htable_put(info->hinfo);
}
-#ifdef CONFIG_COMPAT
-struct compat_xt_hashlimit_info {
- char name[IFNAMSIZ];
- struct hashlimit_cfg cfg;
- compat_uptr_t hinfo;
- compat_uptr_t master;
-};
-
-static void hashlimit_mt_compat_from_user(void *dst, const void *src)
-{
- int off = offsetof(struct compat_xt_hashlimit_info, hinfo);
-
- memcpy(dst, src, off);
- memset(dst + off, 0, sizeof(struct compat_xt_hashlimit_info) - off);
-}
-
-static int hashlimit_mt_compat_to_user(void __user *dst, const void *src)
-{
- int off = offsetof(struct compat_xt_hashlimit_info, hinfo);
-
- return copy_to_user(dst, src, off) ? -EFAULT : 0;
-}
-#endif
-
static struct xt_match hashlimit_mt_reg[] __read_mostly = {
{
- .name = "hashlimit",
- .revision = 0,
- .family = NFPROTO_IPV4,
- .match = hashlimit_mt_v0,
- .matchsize = sizeof(struct xt_hashlimit_info),
-#ifdef CONFIG_COMPAT
- .compatsize = sizeof(struct compat_xt_hashlimit_info),
- .compat_from_user = hashlimit_mt_compat_from_user,
- .compat_to_user = hashlimit_mt_compat_to_user,
-#endif
- .checkentry = hashlimit_mt_check_v0,
- .destroy = hashlimit_mt_destroy_v0,
- .me = THIS_MODULE
- },
- {
.name = "hashlimit",
.revision = 1,
.family = NFPROTO_IPV4,
@@ -816,20 +609,6 @@ static struct xt_match hashlimit_mt_reg[] __read_mostly = {
},
#if defined(CONFIG_IP6_NF_IPTABLES) || defined(CONFIG_IP6_NF_IPTABLES_MODULE)
{
- .name = "hashlimit",
- .family = NFPROTO_IPV6,
- .match = hashlimit_mt_v0,
- .matchsize = sizeof(struct xt_hashlimit_info),
-#ifdef CONFIG_COMPAT
- .compatsize = sizeof(struct compat_xt_hashlimit_info),
- .compat_from_user = hashlimit_mt_compat_from_user,
- .compat_to_user = hashlimit_mt_compat_to_user,
-#endif
- .checkentry = hashlimit_mt_check_v0,
- .destroy = hashlimit_mt_destroy_v0,
- .me = THIS_MODULE
- },
- {
.name = "hashlimit",
.revision = 1,
.family = NFPROTO_IPV6,
--
1.7.0.4
--
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