diff options
| author | Dmitry Safonov <dima@arista.com> | 2020-09-21 17:36:51 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2020-09-24 09:53:03 +0300 |
| commit | c9e7c76d70fa50582ca96759829c93d0dd024662 (patch) | |
| tree | 449b6f268623b85daf205b2ba6e57a89981cdb2c /include/net/xfrm.h | |
| parent | 02a20d4fef3da0278bd2d95c86f48318a9902b76 (diff) | |
| download | linux-c9e7c76d70fa50582ca96759829c93d0dd024662.tar.xz | |
xfrm: Provide API to register translator module
Add a skeleton for xfrm_compat module and provide API to register it in
xfrm_state.ko. struct xfrm_translator will have function pointers to
translate messages received from 32-bit userspace or to be sent to it
from 64-bit kernel.
module_get()/module_put() are used instead of rcu_read_lock() as the
module will vmalloc() memory for translation.
The new API is registered with xfrm_state module, not with xfrm_user as
the former needs translator for user_policy set by setsockopt() and
xfrm_user already uses functions from xfrm_state.
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'include/net/xfrm.h')
| -rw-r--r-- | include/net/xfrm.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 2737d24ec244..fe2e3717da14 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -2000,6 +2000,25 @@ static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, return 0; } +struct xfrm_translator { + struct module *owner; +}; + +#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT) +extern int xfrm_register_translator(struct xfrm_translator *xtr); +extern int xfrm_unregister_translator(struct xfrm_translator *xtr); +extern struct xfrm_translator *xfrm_get_translator(void); +extern void xfrm_put_translator(struct xfrm_translator *xtr); +#else +static inline struct xfrm_translator *xfrm_get_translator(void) +{ + return NULL; +} +static inline void xfrm_put_translator(struct xfrm_translator *xtr) +{ +} +#endif + #if IS_ENABLED(CONFIG_IPV6) static inline bool xfrm6_local_dontfrag(const struct sock *sk) { |