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netns PF_KEY: part 2

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* interaction with userspace -- take netns from userspace socket.
* in ->notify hook take netns either from SA or explicitly passed --
	we don't know if SA/SPD flush is coming.
* stub policy migration with init_net for now.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan 2008-11-25 17:58:31 -08:00 committed by David S. Miller
parent 3fa87a3210
commit 07fb0f1799
1 changed files with 60 additions and 45 deletions
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105
net/key/af_key.c
View file

@ -261,9 +261,9 @@ static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2,
#define BROADCAST_REGISTERED 2
#define BROADCAST_PROMISC_ONLY 4
static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation,
int broadcast_flags, struct sock *one_sk)
int broadcast_flags, struct sock *one_sk,
struct net *net)
{
struct net *net = &init_net;
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
struct sock *sk;
struct hlist_node *node;
@ -336,7 +336,7 @@ static int pfkey_do_dump(struct pfkey_sock *pfk)
hdr->sadb_msg_seq = 0;
hdr->sadb_msg_errno = rc;
pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
&pfk->sk);
&pfk->sk, sock_net(&pfk->sk));
pfk->dump.skb = NULL;
}
@ -375,7 +375,7 @@ static int pfkey_error(struct sadb_msg *orig, int err, struct sock *sk)
hdr->sadb_msg_len = (sizeof(struct sadb_msg) /
sizeof(uint64_t));
pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk);
pfkey_broadcast(skb, GFP_KERNEL, BROADCAST_ONE, sk, sock_net(sk));
return 0;
}
@ -653,7 +653,7 @@ int pfkey_sadb_addr2xfrm_addr(struct sadb_address *addr, xfrm_address_t *xaddr)
xaddr);
}
static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **ext_hdrs)
static struct xfrm_state *pfkey_xfrm_state_lookup(struct net *net, struct sadb_msg *hdr, void **ext_hdrs)
{
struct sadb_sa *sa;
struct sadb_address *addr;
@ -691,7 +691,7 @@ static struct xfrm_state *pfkey_xfrm_state_lookup(struct sadb_msg *hdr, void **
if (!xaddr)
return NULL;
return xfrm_state_lookup(&init_net, xaddr, sa->sadb_sa_spi, proto, family);
return xfrm_state_lookup(net, xaddr, sa->sadb_sa_spi, proto, family);
}
#define PFKEY_ALIGN8(a) (1 + (((a) - 1) | (8 - 1)))
@ -1066,7 +1066,8 @@ static inline struct sk_buff *pfkey_xfrm_state2msg_expire(struct xfrm_state *x,
return __pfkey_xfrm_state2msg(x, 0, hsc);
}
static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
struct sadb_msg *hdr,
void **ext_hdrs)
{
struct xfrm_state *x;
@ -1130,7 +1131,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr,
(key->sadb_key_bits+7) / 8 > key->sadb_key_len * sizeof(uint64_t)))
return ERR_PTR(-EINVAL);
x = xfrm_state_alloc(&init_net);
x = xfrm_state_alloc(net);
if (x == NULL)
return ERR_PTR(-ENOBUFS);
@ -1306,6 +1307,7 @@ static int pfkey_reserved(struct sock *sk, struct sk_buff *skb, struct sadb_msg
static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
struct sk_buff *resp_skb;
struct sadb_x_sa2 *sa2;
struct sadb_address *saddr, *daddr;
@ -1356,7 +1358,7 @@ static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
}
if (hdr->sadb_msg_seq) {
x = xfrm_find_acq_byseq(&init_net, hdr->sadb_msg_seq);
x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
if (x && xfrm_addr_cmp(&x->id.daddr, xdaddr, family)) {
xfrm_state_put(x);
x = NULL;
@ -1364,7 +1366,7 @@ static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
}
if (!x)
x = xfrm_find_acq(&init_net, mode, reqid, proto, xdaddr, xsaddr, 1, family);
x = xfrm_find_acq(net, mode, reqid, proto, xdaddr, xsaddr, 1, family);
if (x == NULL)
return -ENOENT;
@ -1397,13 +1399,14 @@ static int pfkey_getspi(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
xfrm_state_put(x);
pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk);
pfkey_broadcast(resp_skb, GFP_KERNEL, BROADCAST_ONE, sk, net);
return 0;
}
static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
struct xfrm_state *x;
if (hdr->sadb_msg_len != sizeof(struct sadb_msg)/8)
@ -1412,14 +1415,14 @@ static int pfkey_acquire(struct sock *sk, struct sk_buff *skb, struct sadb_msg *
if (hdr->sadb_msg_seq == 0 || hdr->sadb_msg_errno == 0)
return 0;
x = xfrm_find_acq_byseq(&init_net, hdr->sadb_msg_seq);
x = xfrm_find_acq_byseq(net, hdr->sadb_msg_seq);
if (x == NULL)
return 0;
spin_lock_bh(&x->lock);
if (x->km.state == XFRM_STATE_ACQ) {
x->km.state = XFRM_STATE_ERROR;
wake_up(&init_net.xfrm.km_waitq);
wake_up(&net->xfrm.km_waitq);
}
spin_unlock_bh(&x->lock);
xfrm_state_put(x);
@ -1484,18 +1487,19 @@ static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
hdr->sadb_msg_seq = c->seq;
hdr->sadb_msg_pid = c->pid;
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xs_net(x));
return 0;
}
static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
struct xfrm_state *x;
int err;
struct km_event c;
x = pfkey_msg2xfrm_state(hdr, ext_hdrs);
x = pfkey_msg2xfrm_state(net, hdr, ext_hdrs);
if (IS_ERR(x))
return PTR_ERR(x);
@ -1529,6 +1533,7 @@ out:
static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
struct xfrm_state *x;
struct km_event c;
int err;
@ -1538,7 +1543,7 @@ static int pfkey_delete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
return -EINVAL;
x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
if (x == NULL)
return -ESRCH;
@ -1570,6 +1575,7 @@ out:
static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
__u8 proto;
struct sk_buff *out_skb;
struct sadb_msg *out_hdr;
@ -1580,7 +1586,7 @@ static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
ext_hdrs[SADB_EXT_ADDRESS_DST-1]))
return -EINVAL;
x = pfkey_xfrm_state_lookup(hdr, ext_hdrs);
x = pfkey_xfrm_state_lookup(net, hdr, ext_hdrs);
if (x == NULL)
return -ESRCH;
@ -1598,7 +1604,7 @@ static int pfkey_get(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
out_hdr->sadb_msg_reserved = 0;
out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, sock_net(sk));
return 0;
}
@ -1699,7 +1705,7 @@ static int pfkey_register(struct sock *sk, struct sk_buff *skb, struct sadb_msg
return -ENOBUFS;
}
pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk);
pfkey_broadcast(supp_skb, GFP_KERNEL, BROADCAST_REGISTERED, sk, sock_net(sk));
return 0;
}
@ -1721,13 +1727,14 @@ static int key_notify_sa_flush(struct km_event *c)
hdr->sadb_msg_errno = (uint8_t) 0;
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
return 0;
}
static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
unsigned proto;
struct km_event c;
struct xfrm_audit audit_info;
@ -1740,14 +1747,14 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd
audit_info.loginuid = audit_get_loginuid(current);
audit_info.sessionid = audit_get_sessionid(current);
audit_info.secid = 0;
err = xfrm_state_flush(&init_net, proto, &audit_info);
err = xfrm_state_flush(net, proto, &audit_info);
if (err)
return err;
c.data.proto = proto;
c.seq = hdr->sadb_msg_seq;
c.pid = hdr->sadb_msg_pid;
c.event = XFRM_MSG_FLUSHSA;
c.net = &init_net;
c.net = net;
km_state_notify(NULL, &c);
return 0;
@ -1777,7 +1784,7 @@ static int dump_sa(struct xfrm_state *x, int count, void *ptr)
if (pfk->dump.skb)
pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
&pfk->sk);
&pfk->sk, sock_net(&pfk->sk));
pfk->dump.skb = out_skb;
return 0;
@ -1785,7 +1792,8 @@ static int dump_sa(struct xfrm_state *x, int count, void *ptr)
static int pfkey_dump_sa(struct pfkey_sock *pfk)
{
return xfrm_state_walk(&init_net, &pfk->dump.u.state, dump_sa, (void *) pfk);
struct net *net = sock_net(&pfk->sk);
return xfrm_state_walk(net, &pfk->dump.u.state, dump_sa, (void *) pfk);
}
static void pfkey_dump_sa_done(struct pfkey_sock *pfk)
@ -1826,7 +1834,7 @@ static int pfkey_promisc(struct sock *sk, struct sk_buff *skb, struct sadb_msg *
return -EINVAL;
pfk->promisc = satype;
}
pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL);
pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, BROADCAST_ALL, NULL, sock_net(sk));
return 0;
}
@ -1842,7 +1850,7 @@ static int check_reqid(struct xfrm_policy *xp, int dir, int count, void *ptr)
return 0;
}
static u32 gen_reqid(void)
static u32 gen_reqid(struct net *net)
{
struct xfrm_policy_walk walk;
u32 start;
@ -1855,7 +1863,7 @@ static u32 gen_reqid(void)
if (reqid == 0)
reqid = IPSEC_MANUAL_REQID_MAX+1;
xfrm_policy_walk_init(&walk, XFRM_POLICY_TYPE_MAIN);
rc = xfrm_policy_walk(&init_net, &walk, check_reqid, (void*)&reqid);
rc = xfrm_policy_walk(net, &walk, check_reqid, (void*)&reqid);
xfrm_policy_walk_done(&walk);
if (rc != -EEXIST)
return reqid;
@ -1866,6 +1874,7 @@ static u32 gen_reqid(void)
static int
parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
{
struct net *net = xp_net(xp);
struct xfrm_tmpl *t = xp->xfrm_vec + xp->xfrm_nr;
int mode;
@ -1885,7 +1894,7 @@ parse_ipsecrequest(struct xfrm_policy *xp, struct sadb_x_ipsecrequest *rq)
t->reqid = rq->sadb_x_ipsecrequest_reqid;
if (t->reqid > IPSEC_MANUAL_REQID_MAX)
t->reqid = 0;
if (!t->reqid && !(t->reqid = gen_reqid()))
if (!t->reqid && !(t->reqid = gen_reqid(net)))
return -ENOBUFS;
}
@ -2156,7 +2165,7 @@ static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c
out_hdr->sadb_msg_errno = 0;
out_hdr->sadb_msg_seq = c->seq;
out_hdr->sadb_msg_pid = c->pid;
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
out:
return 0;
@ -2164,6 +2173,7 @@ out:
static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
int err = 0;
struct sadb_lifetime *lifetime;
struct sadb_address *sa;
@ -2183,7 +2193,7 @@ static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
if (!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir >= IPSEC_DIR_MAX)
return -EINVAL;
xp = xfrm_policy_alloc(&init_net, GFP_KERNEL);
xp = xfrm_policy_alloc(net, GFP_KERNEL);
if (xp == NULL)
return -ENOBUFS;
@ -2284,6 +2294,7 @@ out:
static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
int err;
struct sadb_address *sa;
struct sadb_x_policy *pol;
@ -2333,7 +2344,7 @@ static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, struct sadb_msg
return err;
}
xp = xfrm_policy_bysel_ctx(&init_net, XFRM_POLICY_TYPE_MAIN,
xp = xfrm_policy_bysel_ctx(net, XFRM_POLICY_TYPE_MAIN,
pol->sadb_x_policy_dir - 1, &sel, pol_ctx,
1, &err);
security_xfrm_policy_free(pol_ctx);
@ -2381,7 +2392,7 @@ static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, struct sadb
out_hdr->sadb_msg_errno = 0;
out_hdr->sadb_msg_seq = hdr->sadb_msg_seq;
out_hdr->sadb_msg_pid = hdr->sadb_msg_pid;
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk);
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ONE, sk, xp_net(xp));
err = 0;
out:
@ -2566,6 +2577,7 @@ static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
unsigned int dir;
int err = 0, delete;
struct sadb_x_policy *pol;
@ -2580,7 +2592,7 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
return -EINVAL;
delete = (hdr->sadb_msg_type == SADB_X_SPDDELETE2);
xp = xfrm_policy_byid(&init_net, XFRM_POLICY_TYPE_MAIN, dir,
xp = xfrm_policy_byid(net, XFRM_POLICY_TYPE_MAIN, dir,
pol->sadb_x_policy_id, delete, &err);
if (xp == NULL)
return -ENOENT;
@ -2634,7 +2646,7 @@ static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
if (pfk->dump.skb)
pfkey_broadcast(pfk->dump.skb, GFP_ATOMIC, BROADCAST_ONE,
&pfk->sk);
&pfk->sk, sock_net(&pfk->sk));
pfk->dump.skb = out_skb;
return 0;
@ -2642,7 +2654,8 @@ static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
static int pfkey_dump_sp(struct pfkey_sock *pfk)
{
return xfrm_policy_walk(&init_net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
struct net *net = sock_net(&pfk->sk);
return xfrm_policy_walk(net, &pfk->dump.u.policy, dump_sp, (void *) pfk);
}
static void pfkey_dump_sp_done(struct pfkey_sock *pfk)
@ -2681,13 +2694,14 @@ static int key_notify_policy_flush(struct km_event *c)
hdr->sadb_msg_version = PF_KEY_V2;
hdr->sadb_msg_errno = (uint8_t) 0;
hdr->sadb_msg_len = (sizeof(struct sadb_msg) / sizeof(uint64_t));
pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL);
pfkey_broadcast(skb_out, GFP_ATOMIC, BROADCAST_ALL, NULL, c->net);
return 0;
}
static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
struct net *net = sock_net(sk);
struct km_event c;
struct xfrm_audit audit_info;
int err;
@ -2695,14 +2709,14 @@ static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg
audit_info.loginuid = audit_get_loginuid(current);
audit_info.sessionid = audit_get_sessionid(current);
audit_info.secid = 0;
err = xfrm_policy_flush(&init_net, XFRM_POLICY_TYPE_MAIN, &audit_info);
err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
if (err)
return err;
c.data.type = XFRM_POLICY_TYPE_MAIN;
c.event = XFRM_MSG_FLUSHPOLICY;
c.pid = hdr->sadb_msg_pid;
c.seq = hdr->sadb_msg_seq;
c.net = &init_net;
c.net = net;
km_policy_notify(NULL, 0, &c);
return 0;
@ -2742,7 +2756,7 @@ static int pfkey_process(struct sock *sk, struct sk_buff *skb, struct sadb_msg *
int err;
pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL,
BROADCAST_PROMISC_ONLY, NULL);
BROADCAST_PROMISC_ONLY, NULL, sock_net(sk));
memset(ext_hdrs, 0, sizeof(ext_hdrs));
err = parse_exthdrs(skb, hdr, ext_hdrs);
@ -2945,13 +2959,13 @@ static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
out_hdr->sadb_msg_seq = 0;
out_hdr->sadb_msg_pid = 0;
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
return 0;
}
static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c)
{
struct net *net = &init_net;
struct net *net = x ? xs_net(x) : c->net;
struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id);
if (atomic_read(&net_pfkey->socks_nr) == 0)
@ -3116,12 +3130,13 @@ static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct
xfrm_ctx->ctx_len);
}
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
}
static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
u8 *data, int len, int *dir)
{
struct net *net = sock_net(sk);
struct xfrm_policy *xp;
struct sadb_x_policy *pol = (struct sadb_x_policy*)data;
struct sadb_x_sec_ctx *sec_ctx;
@ -3154,7 +3169,7 @@ static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
(!pol->sadb_x_policy_dir || pol->sadb_x_policy_dir > IPSEC_DIR_OUTBOUND))
return NULL;
xp = xfrm_policy_alloc(&init_net, GFP_ATOMIC);
xp = xfrm_policy_alloc(net, GFP_ATOMIC);
if (xp == NULL) {
*dir = -ENOBUFS;
return NULL;
@ -3313,7 +3328,7 @@ static int pfkey_send_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
n_port->sadb_x_nat_t_port_port = sport;
n_port->sadb_x_nat_t_port_reserved = 0;
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL, xs_net(x));
}
#ifdef CONFIG_NET_KEY_MIGRATE
@ -3504,7 +3519,7 @@ static int pfkey_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
}
/* broadcast migrate message to sockets */
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL);
pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_ALL, NULL, &init_net);
return 0;