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[NETFILTER]: ctnetlink: change table dumping not to require an unique ID

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Instead of using the ID to find out where to continue dumping, take a
reference to the last entry dumped and try to continue there.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-05-29 18:24:58 -07:00 committed by David S. Miller
parent 3726add766
commit 89f2e21883
2 changed files with 48 additions and 16 deletions
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32
net/ipv4/netfilter/ip_conntrack_netlink.c
View file

@ -399,38 +399,54 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
static int ctnetlink_done(struct netlink_callback *cb)
{
DEBUGP("entered %s\n", __FUNCTION__);
if (cb->args[1])
ip_conntrack_put((struct ip_conntrack *)cb->args[1]);
return 0;
}
static int
ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
struct ip_conntrack *ct = NULL;
struct ip_conntrack *ct, *last;
struct ip_conntrack_tuple_hash *h;
struct list_head *i;
u_int32_t *id = (u_int32_t *) &cb->args[1];
DEBUGP("entered %s, last bucket=%lu id=%u\n", __FUNCTION__,
cb->args[0], *id);
read_lock_bh(&ip_conntrack_lock);
for (; cb->args[0] < ip_conntrack_htable_size; cb->args[0]++, *id = 0) {
for (; cb->args[0] < ip_conntrack_htable_size; cb->args[0]++) {
restart:
last = (struct ip_conntrack *)cb->args[1];
list_for_each_prev(i, &ip_conntrack_hash[cb->args[0]]) {
h = (struct ip_conntrack_tuple_hash *) i;
if (DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
ct = tuplehash_to_ctrack(h);
if (ct->id <= *id)
continue;
if (last != NULL) {
if (ct == last) {
ip_conntrack_put(last);
cb->args[1] = 0;
last = NULL;
} else
continue;
}
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW,
1, ct) < 0)
1, ct) < 0) {
nf_conntrack_get(&ct->ct_general);
cb->args[1] = (unsigned long)ct;
goto out;
*id = ct->id;
}
}
if (last != NULL) {
ip_conntrack_put(last);
cb->args[1] = 0;
goto restart;
}
}
out:
out:
read_unlock_bh(&ip_conntrack_lock);
DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id);

32
net/netfilter/nf_conntrack_netlink.c
View file

@ -407,6 +407,8 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
static int ctnetlink_done(struct netlink_callback *cb)
{
if (cb->args[1])
nf_ct_put((struct nf_conn *)cb->args[1]);
DEBUGP("entered %s\n", __FUNCTION__);
return 0;
}
@ -416,10 +418,9 @@ static int ctnetlink_done(struct netlink_callback *cb)
static int
ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
struct nf_conn *ct = NULL;
struct nf_conn *ct, *last;
struct nf_conntrack_tuple_hash *h;
struct list_head *i;
u_int32_t *id = (u_int32_t *) &cb->args[1];
struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
u_int8_t l3proto = nfmsg->nfgen_family;
@ -427,7 +428,9 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
cb->args[0], *id);
read_lock_bh(&nf_conntrack_lock);
for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++, *id = 0) {
for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
restart:
last = (struct nf_conn *)cb->args[1];
list_for_each_prev(i, &nf_conntrack_hash[cb->args[0]]) {
h = (struct nf_conntrack_tuple_hash *) i;
if (DIRECTION(h) != IP_CT_DIR_ORIGINAL)
@ -438,17 +441,30 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
* then dump everything. */
if (l3proto && L3PROTO(ct) != l3proto)
continue;
if (ct->id <= *id)
continue;
if (last != NULL) {
if (ct == last) {
nf_ct_put(last);
cb->args[1] = 0;
last = NULL;
} else
continue;
}
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW,
1, ct) < 0)
1, ct) < 0) {
nf_conntrack_get(&ct->ct_general);
cb->args[1] = (unsigned long)ct;
goto out;
*id = ct->id;
}
}
if (last != NULL) {
nf_ct_put(last);
cb->args[1] = 0;
goto restart;
}
}
out:
out:
read_unlock_bh(&nf_conntrack_lock);
DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id);