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Message-Id: <1227634045-27534-40-git-send-email-adobriyan@gmail.com>
Date: Tue, 25 Nov 2008 20:27:12 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: davem@...emloft.net
Cc: herbert@...dor.apana.org.au, kuznet@....inr.ac.ru,
netdev@...r.kernel.org, containers@...ts.linux-foundation.org,
Alexey Dobriyan <adobriyan@...il.com>
Subject: [PATCH 40/53] netns xfrm: per-netns NETLINK_XFRM socket
Stub senders to init_net's one temporarily.
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
include/net/netns/xfrm.h | 2 +
include/net/xfrm.h | 7 ++-
net/xfrm/xfrm_output.c | 3 +-
net/xfrm/xfrm_state.c | 7 +--
net/xfrm/xfrm_user.c | 108 +++++++++++++++++++++++++++++++---------------
5 files changed, 83 insertions(+), 44 deletions(-)
diff --git a/include/net/netns/xfrm.h b/include/net/netns/xfrm.h
index c53d173..09f3060 100644
--- a/include/net/netns/xfrm.h
+++ b/include/net/netns/xfrm.h
@@ -39,6 +39,8 @@ struct netns_xfrm {
struct xfrm_policy_hash policy_bydst[XFRM_POLICY_MAX * 2];
unsigned int policy_count[XFRM_POLICY_MAX * 2];
struct work_struct policy_hash_work;
+
+ struct sock *nlsk;
};
#endif
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index bd25150..e027179 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -48,7 +48,6 @@ DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics);
#define XFRM_INC_STATS_USER(field)
#endif
-extern struct sock *xfrm_nl;
extern u32 sysctl_xfrm_aevent_etime;
extern u32 sysctl_xfrm_aevent_rseqth;
extern int sysctl_xfrm_larval_drop;
@@ -1516,18 +1515,20 @@ static inline int xfrm_policy_id2dir(u32 index)
return index & 7;
}
-static inline int xfrm_aevent_is_on(void)
+#ifdef CONFIG_XFRM
+static inline int xfrm_aevent_is_on(struct net *net)
{
struct sock *nlsk;
int ret = 0;
rcu_read_lock();
- nlsk = rcu_dereference(xfrm_nl);
+ nlsk = rcu_dereference(net->xfrm.nlsk);
if (nlsk)
ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
rcu_read_unlock();
return ret;
}
+#endif
static inline int xfrm_alg_len(struct xfrm_algo *alg)
{
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index dc50f1e..ba90e5e 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -41,6 +41,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
{
struct dst_entry *dst = skb->dst;
struct xfrm_state *x = dst->xfrm;
+ struct net *net = xs_net(x);
if (err <= 0)
goto resume;
@@ -74,7 +75,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
err = -EOVERFLOW;
goto error;
}
- if (xfrm_aevent_is_on())
+ if (xfrm_aevent_is_on(net))
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index ea340bb..21db37a 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -24,9 +24,6 @@
#include "xfrm_hash.h"
-struct sock *xfrm_nl;
-EXPORT_SYMBOL(xfrm_nl);
-
u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME;
EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
@@ -1659,7 +1656,7 @@ static void xfrm_replay_timer_handler(unsigned long data)
spin_lock(&x->lock);
if (x->km.state == XFRM_STATE_VALID) {
- if (xfrm_aevent_is_on())
+ if (xfrm_aevent_is_on(xs_net(x)))
xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
else
x->xflags |= XFRM_TIME_DEFER;
@@ -1715,7 +1712,7 @@ void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
x->replay.bitmap |= (1U << diff);
}
- if (xfrm_aevent_is_on())
+ if (xfrm_aevent_is_on(xs_net(x)))
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index f6e0272..8b5b01d 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -703,6 +703,7 @@ nla_put_failure:
static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
+ struct net *net = sock_net(skb->sk);
struct sk_buff *r_skb;
u32 *flags = nlmsg_data(nlh);
u32 spid = NETLINK_CB(skb).pid;
@@ -715,7 +716,7 @@ static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
BUG();
- return nlmsg_unicast(xfrm_nl, r_skb, spid);
+ return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
}
static inline size_t xfrm_sadinfo_msgsize(void)
@@ -756,6 +757,7 @@ nla_put_failure:
static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
+ struct net *net = sock_net(skb->sk);
struct sk_buff *r_skb;
u32 *flags = nlmsg_data(nlh);
u32 spid = NETLINK_CB(skb).pid;
@@ -768,12 +770,13 @@ static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
BUG();
- return nlmsg_unicast(xfrm_nl, r_skb, spid);
+ return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
}
static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
+ struct net *net = &init_net;
struct xfrm_usersa_id *p = nlmsg_data(nlh);
struct xfrm_state *x;
struct sk_buff *resp_skb;
@@ -787,7 +790,7 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
if (IS_ERR(resp_skb)) {
err = PTR_ERR(resp_skb);
} else {
- err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
}
xfrm_state_put(x);
out_noput:
@@ -820,6 +823,7 @@ static int verify_userspi_info(struct xfrm_userspi_info *p)
static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
+ struct net *net = &init_net;
struct xfrm_state *x;
struct xfrm_userspi_info *p;
struct sk_buff *resp_skb;
@@ -837,7 +841,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
x = NULL;
if (p->info.seq) {
- x = xfrm_find_acq_byseq(&init_net, p->info.seq);
+ x = xfrm_find_acq_byseq(net, p->info.seq);
if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
xfrm_state_put(x);
x = NULL;
@@ -845,7 +849,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
}
if (!x)
- x = xfrm_find_acq(&init_net, p->info.mode, p->info.reqid,
+ x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
p->info.id.proto, daddr,
&p->info.saddr, 1,
family);
@@ -863,7 +867,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
goto out;
}
- err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
out:
xfrm_state_put(x);
@@ -1311,6 +1315,7 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
+ struct net *net = &init_net;
struct xfrm_policy *xp;
struct xfrm_userpolicy_id *p;
u8 type = XFRM_POLICY_TYPE_MAIN;
@@ -1330,7 +1335,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
return err;
if (p->index)
- xp = xfrm_policy_byid(&init_net, type, p->dir, p->index, delete, &err);
+ xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
else {
struct nlattr *rt = attrs[XFRMA_SEC_CTX];
struct xfrm_sec_ctx *ctx;
@@ -1347,7 +1352,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
if (err)
return err;
}
- xp = xfrm_policy_bysel_ctx(&init_net, type, p->dir, &p->sel, ctx,
+ xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
delete, &err);
security_xfrm_policy_free(ctx);
}
@@ -1361,7 +1366,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
if (IS_ERR(resp_skb)) {
err = PTR_ERR(resp_skb);
} else {
- err = nlmsg_unicast(xfrm_nl, resp_skb,
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
NETLINK_CB(skb).pid);
}
} else {
@@ -1457,6 +1462,7 @@ nla_put_failure:
static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
+ struct net *net = &init_net;
struct xfrm_state *x;
struct sk_buff *r_skb;
int err;
@@ -1468,7 +1474,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
if (r_skb == NULL)
return -ENOMEM;
- x = xfrm_state_lookup(&init_net, &id->daddr, id->spi, id->proto, id->family);
+ x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
if (x == NULL) {
kfree_skb(r_skb);
return -ESRCH;
@@ -1486,7 +1492,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
if (build_aevent(r_skb, x, &c) < 0)
BUG();
- err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
+ err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
spin_unlock_bh(&x->lock);
xfrm_state_put(x);
return err;
@@ -1869,6 +1875,7 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
struct xfrm_migrate *m, int num_migrate,
struct xfrm_kmaddress *k)
{
+ struct net *net = &init_net;
struct sk_buff *skb;
skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
@@ -1879,7 +1886,7 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
}
#else
static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
@@ -1968,6 +1975,7 @@ static struct xfrm_link {
static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
+ struct net *net = sock_net(skb->sk);
struct nlattr *attrs[XFRMA_MAX+1];
struct xfrm_link *link;
int type, err;
@@ -1989,7 +1997,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (link->dump == NULL)
return -EINVAL;
- return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, link->done);
+ return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
}
err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
@@ -2033,6 +2041,7 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_eve
static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
{
+ struct net *net = &init_net;
struct sk_buff *skb;
skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
@@ -2042,11 +2051,12 @@ static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
if (build_expire(skb, x, c) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
}
static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
{
+ struct net *net = &init_net;
struct sk_buff *skb;
skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
@@ -2056,11 +2066,12 @@ static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
if (build_aevent(skb, x, c) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
}
static int xfrm_notify_sa_flush(struct km_event *c)
{
+ struct net *net = &init_net;
struct xfrm_usersa_flush *p;
struct nlmsghdr *nlh;
struct sk_buff *skb;
@@ -2081,7 +2092,7 @@ static int xfrm_notify_sa_flush(struct km_event *c)
nlmsg_end(skb, nlh);
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
}
static inline size_t xfrm_sa_len(struct xfrm_state *x)
@@ -2111,6 +2122,7 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x)
static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
{
+ struct net *net = &init_net;
struct xfrm_usersa_info *p;
struct xfrm_usersa_id *id;
struct nlmsghdr *nlh;
@@ -2155,7 +2167,7 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
nlmsg_end(skb, nlh);
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
nla_put_failure:
/* Somebody screwed up with xfrm_sa_len! */
@@ -2235,6 +2247,7 @@ nlmsg_failure:
static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
struct xfrm_policy *xp, int dir)
{
+ struct net *net = xs_net(x);
struct sk_buff *skb;
skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
@@ -2244,7 +2257,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
if (build_acquire(skb, x, xt, xp, dir) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
}
/* User gives us xfrm_user_policy_info followed by an array of 0
@@ -2344,6 +2357,7 @@ nlmsg_failure:
static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
{
+ struct net *net = &init_net;
struct sk_buff *skb;
skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
@@ -2353,11 +2367,12 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve
if (build_polexpire(skb, xp, dir, c) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
}
static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
{
+ struct net *net = &init_net;
struct xfrm_userpolicy_info *p;
struct xfrm_userpolicy_id *id;
struct nlmsghdr *nlh;
@@ -2408,7 +2423,7 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *
nlmsg_end(skb, nlh);
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
nlmsg_failure:
kfree_skb(skb);
@@ -2417,6 +2432,7 @@ nlmsg_failure:
static int xfrm_notify_policy_flush(struct km_event *c)
{
+ struct net *net = &init_net;
struct nlmsghdr *nlh;
struct sk_buff *skb;
@@ -2432,7 +2448,7 @@ static int xfrm_notify_policy_flush(struct km_event *c)
nlmsg_end(skb, nlh);
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
nlmsg_failure:
kfree_skb(skb);
@@ -2491,6 +2507,7 @@ nla_put_failure:
static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
xfrm_address_t *addr)
{
+ struct net *net = &init_net;
struct sk_buff *skb;
skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
@@ -2500,7 +2517,7 @@ static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
if (build_report(skb, proto, sel, addr) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
}
static inline size_t xfrm_mapping_msgsize(void)
@@ -2536,6 +2553,7 @@ static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
__be16 sport)
{
+ struct net *net = xs_net(x);
struct sk_buff *skb;
if (x->id.proto != IPPROTO_ESP)
@@ -2551,7 +2569,7 @@ static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
if (build_mapping(skb, x, ipaddr, sport) < 0)
BUG();
- return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
}
static struct xfrm_mgr netlink_mgr = {
@@ -2565,33 +2583,53 @@ static struct xfrm_mgr netlink_mgr = {
.new_mapping = xfrm_send_mapping,
};
-static int __init xfrm_user_init(void)
+static int __net_init xfrm_user_net_init(struct net *net)
{
struct sock *nlsk;
- printk(KERN_INFO "Initializing XFRM netlink socket\n");
-
- nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,
+ nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
xfrm_netlink_rcv, NULL, THIS_MODULE);
if (nlsk == NULL)
return -ENOMEM;
- rcu_assign_pointer(xfrm_nl, nlsk);
-
- xfrm_register_km(&netlink_mgr);
-
+ rcu_assign_pointer(net->xfrm.nlsk, nlsk);
return 0;
}
-static void __exit xfrm_user_exit(void)
+static void __net_exit xfrm_user_net_exit(struct net *net)
{
- struct sock *nlsk = xfrm_nl;
+ struct sock *nlsk = net->xfrm.nlsk;
- xfrm_unregister_km(&netlink_mgr);
- rcu_assign_pointer(xfrm_nl, NULL);
+ rcu_assign_pointer(net->xfrm.nlsk, NULL);
synchronize_rcu();
netlink_kernel_release(nlsk);
}
+static struct pernet_operations xfrm_user_net_ops = {
+ .init = xfrm_user_net_init,
+ .exit = xfrm_user_net_exit,
+};
+
+static int __init xfrm_user_init(void)
+{
+ int rv;
+
+ printk(KERN_INFO "Initializing XFRM netlink socket\n");
+
+ rv = register_pernet_subsys(&xfrm_user_net_ops);
+ if (rv < 0)
+ return rv;
+ rv = xfrm_register_km(&netlink_mgr);
+ if (rv < 0)
+ unregister_pernet_subsys(&xfrm_user_net_ops);
+ return rv;
+}
+
+static void __exit xfrm_user_exit(void)
+{
+ xfrm_unregister_km(&netlink_mgr);
+ unregister_pernet_subsys(&xfrm_user_net_ops);
+}
+
module_init(xfrm_user_init);
module_exit(xfrm_user_exit);
MODULE_LICENSE("GPL");
--
1.5.6.5
--
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