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netfilter: ctnetlink: netns support

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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Alexey Dobriyan 2010-01-13 16:04:18 +01:00 committed by Patrick McHardy
parent cd8c20b650
commit 9592a5c01e
1 changed files with 39 additions and 26 deletions
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65
net/netfilter/nf_conntrack_netlink.c
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@ -30,6 +30,7 @@
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <net/netlink.h> #include <net/netlink.h>
#include <net/sock.h>
#include <net/netfilter/nf_conntrack.h> #include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h> #include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
@ -456,6 +457,7 @@ ctnetlink_nlmsg_size(const struct nf_conn *ct)
static int static int
ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
{ {
struct net *net;
struct nlmsghdr *nlh; struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg; struct nfgenmsg *nfmsg;
struct nlattr *nest_parms; struct nlattr *nest_parms;
@ -482,7 +484,8 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
} else } else
return 0; return 0;
if (!item->report && !nfnetlink_has_listeners(&init_net, group)) net = nf_ct_net(ct);
if (!item->report && !nfnetlink_has_listeners(net, group))
return 0; return 0;
skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
@ -559,7 +562,7 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
rcu_read_unlock(); rcu_read_unlock();
nlmsg_end(skb, nlh); nlmsg_end(skb, nlh);
err = nfnetlink_send(skb, &init_net, item->pid, group, item->report, err = nfnetlink_send(skb, net, item->pid, group, item->report,
GFP_ATOMIC); GFP_ATOMIC);
if (err == -ENOBUFS || err == -EAGAIN) if (err == -ENOBUFS || err == -EAGAIN)
return -ENOBUFS; return -ENOBUFS;
@ -572,7 +575,7 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
nlmsg_failure: nlmsg_failure:
kfree_skb(skb); kfree_skb(skb);
errout: errout:
nfnetlink_set_err(&init_net, 0, group, -ENOBUFS); nfnetlink_set_err(net, 0, group, -ENOBUFS);
return 0; return 0;
} }
#endif /* CONFIG_NF_CONNTRACK_EVENTS */ #endif /* CONFIG_NF_CONNTRACK_EVENTS */
@ -587,6 +590,7 @@ static int ctnetlink_done(struct netlink_callback *cb)
static int static int
ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{ {
struct net *net = sock_net(skb->sk);
struct nf_conn *ct, *last; struct nf_conn *ct, *last;
struct nf_conntrack_tuple_hash *h; struct nf_conntrack_tuple_hash *h;
struct hlist_nulls_node *n; struct hlist_nulls_node *n;
@ -597,7 +601,7 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
last = (struct nf_conn *)cb->args[1]; last = (struct nf_conn *)cb->args[1];
for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
restart: restart:
hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]],
hnnode) { hnnode) {
if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue; continue;
@ -769,6 +773,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlmsghdr *nlh,
const struct nlattr * const cda[]) const struct nlattr * const cda[])
{ {
struct net *net = sock_net(ctnl);
struct nf_conntrack_tuple_hash *h; struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple; struct nf_conntrack_tuple tuple;
struct nf_conn *ct; struct nf_conn *ct;
@ -782,7 +787,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
else { else {
/* Flush the whole table */ /* Flush the whole table */
nf_conntrack_flush_report(&init_net, nf_conntrack_flush_report(net,
NETLINK_CB(skb).pid, NETLINK_CB(skb).pid,
nlmsg_report(nlh)); nlmsg_report(nlh));
return 0; return 0;
@ -791,7 +796,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
if (err < 0) if (err < 0)
return err; return err;
h = nf_conntrack_find_get(&init_net, &tuple); h = nf_conntrack_find_get(net, &tuple);
if (!h) if (!h)
return -ENOENT; return -ENOENT;
@ -829,6 +834,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlmsghdr *nlh,
const struct nlattr * const cda[]) const struct nlattr * const cda[])
{ {
struct net *net = sock_net(ctnl);
struct nf_conntrack_tuple_hash *h; struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple; struct nf_conntrack_tuple tuple;
struct nf_conn *ct; struct nf_conn *ct;
@ -851,7 +857,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
if (err < 0) if (err < 0)
return err; return err;
h = nf_conntrack_find_get(&init_net, &tuple); h = nf_conntrack_find_get(net, &tuple);
if (!h) if (!h)
return -ENOENT; return -ENOENT;
@ -1176,7 +1182,8 @@ ctnetlink_change_conntrack(struct nf_conn *ct,
} }
static struct nf_conn * static struct nf_conn *
ctnetlink_create_conntrack(const struct nlattr * const cda[], ctnetlink_create_conntrack(struct net *net,
const struct nlattr * const cda[],
struct nf_conntrack_tuple *otuple, struct nf_conntrack_tuple *otuple,
struct nf_conntrack_tuple *rtuple, struct nf_conntrack_tuple *rtuple,
u8 u3) u8 u3)
@ -1185,7 +1192,7 @@ ctnetlink_create_conntrack(const struct nlattr * const cda[],
int err = -EINVAL; int err = -EINVAL;
struct nf_conntrack_helper *helper; struct nf_conntrack_helper *helper;
ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); ct = nf_conntrack_alloc(net, otuple, rtuple, GFP_ATOMIC);
if (IS_ERR(ct)) if (IS_ERR(ct))
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
@ -1286,7 +1293,7 @@ ctnetlink_create_conntrack(const struct nlattr * const cda[],
if (err < 0) if (err < 0)
goto err2; goto err2;
master_h = nf_conntrack_find_get(&init_net, &master); master_h = nf_conntrack_find_get(net, &master);
if (master_h == NULL) { if (master_h == NULL) {
err = -ENOENT; err = -ENOENT;
goto err2; goto err2;
@ -1314,6 +1321,7 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlmsghdr *nlh,
const struct nlattr * const cda[]) const struct nlattr * const cda[])
{ {
struct net *net = sock_net(ctnl);
struct nf_conntrack_tuple otuple, rtuple; struct nf_conntrack_tuple otuple, rtuple;
struct nf_conntrack_tuple_hash *h = NULL; struct nf_conntrack_tuple_hash *h = NULL;
struct nfgenmsg *nfmsg = nlmsg_data(nlh); struct nfgenmsg *nfmsg = nlmsg_data(nlh);
@ -1334,9 +1342,9 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
spin_lock_bh(&nf_conntrack_lock); spin_lock_bh(&nf_conntrack_lock);
if (cda[CTA_TUPLE_ORIG]) if (cda[CTA_TUPLE_ORIG])
h = __nf_conntrack_find(&init_net, &otuple); h = __nf_conntrack_find(net, &otuple);
else if (cda[CTA_TUPLE_REPLY]) else if (cda[CTA_TUPLE_REPLY])
h = __nf_conntrack_find(&init_net, &rtuple); h = __nf_conntrack_find(net, &rtuple);
if (h == NULL) { if (h == NULL) {
err = -ENOENT; err = -ENOENT;
@ -1344,7 +1352,7 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
struct nf_conn *ct; struct nf_conn *ct;
enum ip_conntrack_events events; enum ip_conntrack_events events;
ct = ctnetlink_create_conntrack(cda, &otuple, ct = ctnetlink_create_conntrack(net, cda, &otuple,
&rtuple, u3); &rtuple, u3);
if (IS_ERR(ct)) { if (IS_ERR(ct)) {
err = PTR_ERR(ct); err = PTR_ERR(ct);
@ -1526,9 +1534,10 @@ ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
static int static int
ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
{ {
struct nf_conntrack_expect *exp = item->exp;
struct net *net = nf_ct_exp_net(exp);
struct nlmsghdr *nlh; struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg; struct nfgenmsg *nfmsg;
struct nf_conntrack_expect *exp = item->exp;
struct sk_buff *skb; struct sk_buff *skb;
unsigned int type; unsigned int type;
int flags = 0; int flags = 0;
@ -1540,7 +1549,7 @@ ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
return 0; return 0;
if (!item->report && if (!item->report &&
!nfnetlink_has_listeners(&init_net, NFNLGRP_CONNTRACK_EXP_NEW)) !nfnetlink_has_listeners(net, NFNLGRP_CONNTRACK_EXP_NEW))
return 0; return 0;
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
@ -1563,7 +1572,7 @@ ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
rcu_read_unlock(); rcu_read_unlock();
nlmsg_end(skb, nlh); nlmsg_end(skb, nlh);
nfnetlink_send(skb, &init_net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, nfnetlink_send(skb, net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW,
item->report, GFP_ATOMIC); item->report, GFP_ATOMIC);
return 0; return 0;
@ -1573,7 +1582,7 @@ ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
nlmsg_failure: nlmsg_failure:
kfree_skb(skb); kfree_skb(skb);
errout: errout:
nfnetlink_set_err(&init_net, 0, 0, -ENOBUFS); nfnetlink_set_err(net, 0, 0, -ENOBUFS);
return 0; return 0;
} }
#endif #endif
@ -1587,7 +1596,7 @@ static int ctnetlink_exp_done(struct netlink_callback *cb)
static int static int
ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{ {
struct net *net = &init_net; struct net *net = sock_net(skb->sk);
struct nf_conntrack_expect *exp, *last; struct nf_conntrack_expect *exp, *last;
struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
struct hlist_node *n; struct hlist_node *n;
@ -1640,6 +1649,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlmsghdr *nlh,
const struct nlattr * const cda[]) const struct nlattr * const cda[])
{ {
struct net *net = sock_net(ctnl);
struct nf_conntrack_tuple tuple; struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp; struct nf_conntrack_expect *exp;
struct sk_buff *skb2; struct sk_buff *skb2;
@ -1661,7 +1671,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
if (err < 0) if (err < 0)
return err; return err;
exp = nf_ct_expect_find_get(&init_net, &tuple); exp = nf_ct_expect_find_get(net, &tuple);
if (!exp) if (!exp)
return -ENOENT; return -ENOENT;
@ -1701,6 +1711,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlmsghdr *nlh,
const struct nlattr * const cda[]) const struct nlattr * const cda[])
{ {
struct net *net = sock_net(ctnl);
struct nf_conntrack_expect *exp; struct nf_conntrack_expect *exp;
struct nf_conntrack_tuple tuple; struct nf_conntrack_tuple tuple;
struct nf_conntrack_helper *h; struct nf_conntrack_helper *h;
@ -1717,7 +1728,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
return err; return err;
/* bump usage count to 2 */ /* bump usage count to 2 */
exp = nf_ct_expect_find_get(&init_net, &tuple); exp = nf_ct_expect_find_get(net, &tuple);
if (!exp) if (!exp)
return -ENOENT; return -ENOENT;
@ -1747,7 +1758,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
} }
for (i = 0; i < nf_ct_expect_hsize; i++) { for (i = 0; i < nf_ct_expect_hsize; i++) {
hlist_for_each_entry_safe(exp, n, next, hlist_for_each_entry_safe(exp, n, next,
&init_net.ct.expect_hash[i], &net->ct.expect_hash[i],
hnode) { hnode) {
m_help = nfct_help(exp->master); m_help = nfct_help(exp->master);
if (m_help->helper == h if (m_help->helper == h
@ -1763,7 +1774,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
spin_lock_bh(&nf_conntrack_lock); spin_lock_bh(&nf_conntrack_lock);
for (i = 0; i < nf_ct_expect_hsize; i++) { for (i = 0; i < nf_ct_expect_hsize; i++) {
hlist_for_each_entry_safe(exp, n, next, hlist_for_each_entry_safe(exp, n, next,
&init_net.ct.expect_hash[i], &net->ct.expect_hash[i],
hnode) { hnode) {
if (del_timer(&exp->timeout)) { if (del_timer(&exp->timeout)) {
nf_ct_unlink_expect(exp); nf_ct_unlink_expect(exp);
@ -1784,7 +1795,8 @@ ctnetlink_change_expect(struct nf_conntrack_expect *x,
} }
static int static int
ctnetlink_create_expect(const struct nlattr * const cda[], u_int8_t u3, ctnetlink_create_expect(struct net *net, const struct nlattr * const cda[],
u_int8_t u3,
u32 pid, int report) u32 pid, int report)
{ {
struct nf_conntrack_tuple tuple, mask, master_tuple; struct nf_conntrack_tuple tuple, mask, master_tuple;
@ -1806,7 +1818,7 @@ ctnetlink_create_expect(const struct nlattr * const cda[], u_int8_t u3,
return err; return err;
/* Look for master conntrack of this expectation */ /* Look for master conntrack of this expectation */
h = nf_conntrack_find_get(&init_net, &master_tuple); h = nf_conntrack_find_get(net, &master_tuple);
if (!h) if (!h)
return -ENOENT; return -ENOENT;
ct = nf_ct_tuplehash_to_ctrack(h); ct = nf_ct_tuplehash_to_ctrack(h);
@ -1846,6 +1858,7 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
const struct nlmsghdr *nlh, const struct nlmsghdr *nlh,
const struct nlattr * const cda[]) const struct nlattr * const cda[])
{ {
struct net *net = sock_net(ctnl);
struct nf_conntrack_tuple tuple; struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp; struct nf_conntrack_expect *exp;
struct nfgenmsg *nfmsg = nlmsg_data(nlh); struct nfgenmsg *nfmsg = nlmsg_data(nlh);
@ -1862,13 +1875,13 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
return err; return err;
spin_lock_bh(&nf_conntrack_lock); spin_lock_bh(&nf_conntrack_lock);
exp = __nf_ct_expect_find(&init_net, &tuple); exp = __nf_ct_expect_find(net, &tuple);
if (!exp) { if (!exp) {
spin_unlock_bh(&nf_conntrack_lock); spin_unlock_bh(&nf_conntrack_lock);
err = -ENOENT; err = -ENOENT;
if (nlh->nlmsg_flags & NLM_F_CREATE) { if (nlh->nlmsg_flags & NLM_F_CREATE) {
err = ctnetlink_create_expect(cda, err = ctnetlink_create_expect(net, cda,
u3, u3,
NETLINK_CB(skb).pid, NETLINK_CB(skb).pid,
nlmsg_report(nlh)); nlmsg_report(nlh));