From: Dmitry V. Levin <ldv@xxxxxxxxxxxx>
commit a725eb15db80643a160310ed6bcfd6c5a6c907f2 upstream.
Because of <linux/libc-compat.h> interface limitations, <netinet/in.h>
provided by libc cannot be included after <linux/in.h>, therefore any
header that includes <netinet/in.h> cannot be included after <linux/in.h>.
Change uapi/linux/l2tp.h, the last uapi header that includes
<netinet/in.h>, to include <linux/in.h> and <linux/in6.h> instead of
<netinet/in.h> and use __SOCK_SIZE__ instead of sizeof(struct sockaddr)
the same way as uapi/linux/in.h does, to fix linux/if_pppol2tp.h userspace
compilation errors like this:
In file included from /usr/include/linux/l2tp.h:12:0,
from /usr/include/linux/if_pppol2tp.h:21,
/usr/include/netinet/in.h:31:8: error: redefinition of 'struct in_addr'
Fixes: a471a623e780 ("net: l2tp: deprecate PPPOL2TP_MSG_* in favour of L2TP_MSG_*")
Signed-off-by: Dmitry V. Levin <ldv@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Asbjoern Sloth Toennesen <asbjorn@xxxxxxxxxx>
---
Notes:
Sorry for not submitting this in the review cycle,
was waiting for a response to my initial mail,
when the cycle was cut short, had planned to
reply to the review if I hadn't got a reply half
way through it.
https://lore.kernel.org/stable/25373712-4390-5a7a-d3f9-97bd7f2d8a2a@xxxxxxxxxx/
I was unsure which commit, to put in Fixes:,
ended up with the stable commit, and not the
one from mainline. I hope that's correct.
Original patch thread:
https://lore.kernel.org/netdev/20170214103353.GA8394@xxxxxxxxxxxx/
include/uapi/linux/l2tp.h | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/include/uapi/linux/l2tp.h b/include/uapi/linux/l2tp.h
index dedfb2b1832a..c3a5c99f565b 100644
--- a/include/uapi/linux/l2tp.h
+++ b/include/uapi/linux/l2tp.h
@@ -9,9 +9,8 @@
#include <linux/types.h>
#include <linux/socket.h>
-#ifndef __KERNEL__
-#include <netinet/in.h>
-#endif
+#include <linux/in.h>
+#include <linux/in6.h>
#define IPPROTO_L2TP 115
@@ -31,7 +30,7 @@ struct sockaddr_l2tpip {
__u32 l2tp_conn_id; /* Connection ID of tunnel */
/* Pad to size of `struct sockaddr'. */
- unsigned char __pad[sizeof(struct sockaddr) -
+ unsigned char __pad[__SOCK_SIZE__ -
sizeof(__kernel_sa_family_t) -
sizeof(__be16) - sizeof(struct in_addr) -
sizeof(__u32)];
--
2.27.0.rc2
