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WSL2-Linux-Kernel
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[NETFILTER]: ctnetlink: simplify the code to dump the conntrack table 

Merge the bits to dump the conntrack table and the ones to dump and
zero counters in a single piece of code. This patch does not change
the default behaviour if accounting is not enabled.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2006-09-20 12:00:45 -07:00 коммит произвёл David S. Miller
Родитель 90d47db4a0
Коммит 01f348484d
2 изменённых файлов: 20 добавлений и 110 удалений
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63
net/ipv4/netfilter/ip_conntrack_netlink.c
Просмотреть файл

@ -436,6 +436,11 @@ restart:
cb->args[1] = (unsigned long)ct;
goto out;
}
#ifdef CONFIG_NF_CT_ACCT
if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) ==
IPCTNL_MSG_CT_GET_CTRZERO)
memset(&ct->counters, 0, sizeof(ct->counters));
#endif
}
if (cb->args[1]) {
cb->args[1] = 0;
@ -451,46 +456,6 @@ out:
return skb->len;
}
#ifdef CONFIG_IP_NF_CT_ACCT
static int
ctnetlink_dump_table_w(struct sk_buff *skb, struct netlink_callback *cb)
{
struct ip_conntrack *ct = NULL;
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=%u id=%u\n", __FUNCTION__,
cb->args[0], *id);
write_lock_bh(&ip_conntrack_lock);
for (; cb->args[0] < ip_conntrack_htable_size; cb->args[0]++, *id = 0) {
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 (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW,
1, ct) < 0)
goto out;
*id = ct->id;
memset(&ct->counters, 0, sizeof(ct->counters));
}
}
out:
write_unlock_bh(&ip_conntrack_lock);
DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id);
return skb->len;
}
#endif
static const size_t cta_min_ip[CTA_IP_MAX] = {
[CTA_IP_V4_SRC-1] = sizeof(u_int32_t),
[CTA_IP_V4_DST-1] = sizeof(u_int32_t),
@ -775,22 +740,14 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
if (msg->nfgen_family != AF_INET)
return -EAFNOSUPPORT;
if (NFNL_MSG_TYPE(nlh->nlmsg_type) ==
IPCTNL_MSG_CT_GET_CTRZERO) {
#ifdef CONFIG_IP_NF_CT_ACCT
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_dump_table_w,
ctnetlink_done)) != 0)
return -EINVAL;
#else
#ifndef CONFIG_IP_NF_CT_ACCT
if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO)
return -ENOTSUPP;
#endif
} else {
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_dump_table,
ctnetlink_done)) != 0)
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_dump_table,
ctnetlink_done)) != 0)
return -EINVAL;
}
rlen = NLMSG_ALIGN(nlh->nlmsg_len);
if (rlen > skb->len)

67
net/netfilter/nf_conntrack_netlink.c
Просмотреть файл

@ -455,6 +455,11 @@ restart:
cb->args[1] = (unsigned long)ct;
goto out;
}
#ifdef CONFIG_NF_CT_ACCT
if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) ==
IPCTNL_MSG_CT_GET_CTRZERO)
memset(&ct->counters, 0, sizeof(ct->counters));
#endif
}
if (cb->args[1]) {
cb->args[1] = 0;
@ -470,50 +475,6 @@ out:
return skb->len;
}
#ifdef CONFIG_NF_CT_ACCT
static int
ctnetlink_dump_table_w(struct sk_buff *skb, struct netlink_callback *cb)
{
struct nf_conn *ct = NULL;
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;
DEBUGP("entered %s, last bucket=%u id=%u\n", __FUNCTION__,
cb->args[0], *id);
write_lock_bh(&nf_conntrack_lock);
for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++, *id = 0) {
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)
continue;
ct = nf_ct_tuplehash_to_ctrack(h);
if (l3proto && L3PROTO(ct) != l3proto)
continue;
if (ct->id <= *id)
continue;
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW,
1, ct) < 0)
goto out;
*id = ct->id;
memset(&ct->counters, 0, sizeof(ct->counters));
}
}
out:
write_unlock_bh(&nf_conntrack_lock);
DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id);
return skb->len;
}
#endif
static inline int
ctnetlink_parse_tuple_ip(struct nfattr *attr, struct nf_conntrack_tuple *tuple)
{
@ -788,22 +749,14 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
if (nlh->nlmsg_flags & NLM_F_DUMP) {
u32 rlen;
if (NFNL_MSG_TYPE(nlh->nlmsg_type) ==
IPCTNL_MSG_CT_GET_CTRZERO) {
#ifdef CONFIG_NF_CT_ACCT
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_dump_table_w,
ctnetlink_done)) != 0)
return -EINVAL;
#else
#ifndef CONFIG_NF_CT_ACCT
if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO)
return -ENOTSUPP;
#endif
} else {
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_dump_table,
ctnetlink_done)) != 0)
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_dump_table,
ctnetlink_done)) != 0)
return -EINVAL;
}
rlen = NLMSG_ALIGN(nlh->nlmsg_len);
if (rlen > skb->len)