diff options
| author | Dmitry Safonov <dima@arista.com> | 2020-09-21 15:36:51 +0100 |
|---|---|---|
| committer | Alistair Delva <adelva@google.com> | 2020-11-02 16:36:55 +0000 |
| commit | df6415dcd498a7f33b2d50a1d85ddb43b4a3640a (patch) | |
| tree | 9dc5de2ea4e490eab013769896e0026195992896 /include/net | |
| parent | 6f21bc2d227453f2aa3baebdc7b2200dd91ef041 (diff) | |
BACKPORT: 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>
(cherry picked from commit c9e7c76d70fa50582ca96759829c93d0dd024662)
[adelva: Edited around some context changes]
Bug: 163141236
Signed-off-by: Alistair Delva <adelva@google.com>
Change-Id: Ic825c6a0367fa192cc3f7af6b7d2682ef8f9d58b
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/xfrm.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 2a63f7e30506..1e7174c152cf 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1825,4 +1825,24 @@ 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 + #endif /* _NET_XFRM_H */ |