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| author | Dmitry Safonov <dima@arista.com> | 2020-09-21 15:36:52 +0100 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2020-09-24 08:53:03 +0200 |
| commit | 5461fc0c8d9f23956b99f5907f69726a293ccb67 (patch) | |
| tree | c7cd6ef843f83276a0743f6f6e11ae1357ff5a84 /include | |
| parent | c9e7c76d70fa50582ca96759829c93d0dd024662 (diff) | |
| download | linux-stable-5461fc0c8d9f23956b99f5907f69726a293ccb67.tar.gz linux-stable-5461fc0c8d9f23956b99f5907f69726a293ccb67.tar.bz2 linux-stable-5461fc0c8d9f23956b99f5907f69726a293ccb67.zip | |
xfrm/compat: Add 64=>32-bit messages translator
Provide the kernel-to-user translator under XFRM_USER_COMPAT, that
creates for 64-bit xfrm-user message a 32-bit translation and puts it
in skb's frag_list. net/compat.c layer provides MSG_CMSG_COMPAT to
decide if the message should be taken from skb or frag_list.
(used by wext-core which has also an ABI difference)
Kernel sends 64-bit xfrm messages to the userspace for:
- multicast (monitor events)
- netlink dumps
Wire up the translator to xfrm_nlmsg_multicast().
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/xfrm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index fe2e3717da14..5b6cc62c9354 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -2000,7 +2000,12 @@ static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, return 0; } +extern const int xfrm_msg_min[XFRM_NR_MSGTYPES]; + struct xfrm_translator { + /* Allocate frag_list and put compat translation there */ + int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src); + struct module *owner; }; |