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netns xfrm: add struct xfrm_state::xs_net 

To avoid unnecessary complications with passing netns around.

* set once, very early after allocating
* once set, never changes

For a while create every xfrm_state in init_net.

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 17:15:16 -08:00 committed by David S. Miller
parent d62ddc21b6
commit 673c09be45
6 changed files with 19 additions and 10 deletions
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10
include/net/xfrm.h
View File

@ -130,6 +130,9 @@ struct xfrm_state_walk {
/* Full description of state of transformer. */
struct xfrm_state
{
#ifdef CONFIG_NET_NS
struct net *xs_net;
#endif
union {
struct hlist_node gclist;
struct hlist_node bydst;
@ -223,6 +226,11 @@ struct xfrm_state
void *data;
};
static inline struct net *xs_net(struct xfrm_state *x)
{
return read_pnet(&x->xs_net);
}
/* xflags - make enum if more show up */
#define XFRM_TIME_DEFER 1
@ -1296,7 +1304,7 @@ extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto);
extern int xfrm_state_walk(struct xfrm_state_walk *walk,
int (*func)(struct xfrm_state *, int, void*), void *);
extern void xfrm_state_walk_done(struct xfrm_state_walk *walk);
extern struct xfrm_state *xfrm_state_alloc(void);
extern struct xfrm_state *xfrm_state_alloc(struct net *net);
extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
struct flowi *fl, struct xfrm_tmpl *tmpl,
struct xfrm_policy *pol, int *err,

2
net/ipv4/ipcomp.c
View File

@ -49,7 +49,7 @@ static struct xfrm_state *ipcomp_tunnel_create(struct xfrm_state *x)
{
struct xfrm_state *t;
t = xfrm_state_alloc();
t = xfrm_state_alloc(&init_net);
if (t == NULL)
goto out;

2
net/ipv6/ipcomp6.c
View File

@ -76,7 +76,7 @@ static struct xfrm_state *ipcomp6_tunnel_create(struct xfrm_state *x)
{
struct xfrm_state *t = NULL;
t = xfrm_state_alloc();
t = xfrm_state_alloc(&init_net);
if (!t)
goto out;

2
net/key/af_key.c
View File

@ -1122,7 +1122,7 @@ 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();
x = xfrm_state_alloc(&init_net);
if (x == NULL)
return ERR_PTR(-ENOBUFS);

9
net/xfrm/xfrm_state.c
View File

@ -504,13 +504,14 @@ out:
static void xfrm_replay_timer_handler(unsigned long data);
struct xfrm_state *xfrm_state_alloc(void)
struct xfrm_state *xfrm_state_alloc(struct net *net)
{
struct xfrm_state *x;
x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);
if (x) {
write_pnet(&x->xs_net, net);
atomic_set(&x->refcnt, 1);
atomic_set(&x->tunnel_users, 0);
INIT_LIST_HEAD(&x->km.all);
@ -835,7 +836,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
error = -EEXIST;
goto out;
}
x = xfrm_state_alloc();
x = xfrm_state_alloc(&init_net);
if (x == NULL) {
error = -ENOMEM;
goto out;
@ -1017,7 +1018,7 @@ static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 re
if (!create)
return NULL;
x = xfrm_state_alloc();
x = xfrm_state_alloc(&init_net);
if (likely(x)) {
switch (family) {
case AF_INET:
@ -1125,7 +1126,7 @@ EXPORT_SYMBOL(xfrm_state_add);
static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
{
int err = -ENOMEM;
struct xfrm_state *x = xfrm_state_alloc();
struct xfrm_state *x = xfrm_state_alloc(&init_net);
if (!x)
goto error;

4
net/xfrm/xfrm_user.c
View File

@ -320,7 +320,7 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
struct nlattr **attrs,
int *errp)
{
struct xfrm_state *x = xfrm_state_alloc();
struct xfrm_state *x = xfrm_state_alloc(&init_net);
int err = -ENOMEM;
if (!x)
@ -1663,7 +1663,7 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr *rt = attrs[XFRMA_TMPL];
struct xfrm_user_acquire *ua = nlmsg_data(nlh);
struct xfrm_state *x = xfrm_state_alloc();
struct xfrm_state *x = xfrm_state_alloc(&init_net);
int err = -ENOMEM;
if (!x)