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-rw-r--r--target/linux/generic/backport-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch147
-rw-r--r--target/linux/generic/backport-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch55
2 files changed, 202 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch b/target/linux/generic/backport-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
new file mode 100644
index 0000000000..7b82bed535
--- /dev/null
+++ b/target/linux/generic/backport-4.9/270-uapi-libc-compat-add-fallback-for-unsupported-libcs.patch
@@ -0,0 +1,147 @@
+From c6bdd0d302119819de72439972d0462c26ef9eda Mon Sep 17 00:00:00 2001
+From: Felix Janda <felix.janda@posteo.de>
+Date: Sun, 12 Nov 2017 13:30:17 -0500
+Subject: uapi libc compat: add fallback for unsupported libcs
+
+libc-compat.h aims to prevent symbol collisions between uapi and libc
+headers for each supported libc. This requires continuous coordination
+between them.
+
+The goal of this commit is to improve the situation for libcs (such as
+musl) which are not yet supported and/or do not wish to be explicitly
+supported, while not affecting supported libcs. More precisely, with
+this commit, unsupported libcs can request the suppression of any
+specific uapi definition by defining the correspondings _UAPI_DEF_*
+macro as 0. This can fix symbol collisions for them, as long as the
+libc headers are included before the uapi headers. Inclusion in the
+other order is outside the scope of this commit.
+
+All infrastructure in order to enable this fallback for unsupported
+libcs is already in place, except that libc-compat.h unconditionally
+defines all _UAPI_DEF_* macros to 1 for all unsupported libcs so that
+any previous definitions are ignored. In order to fix this, this commit
+merely makes these definitions conditional.
+
+This commit together with the musl libc commit
+
+http://git.musl-libc.org/cgit/musl/commit/?id=04983f2272382af92eb8f8838964ff944fbb8258
+
+fixes for example the following compiler errors when <linux/in6.h> is
+included after musl's <netinet/in.h>:
+
+./linux/in6.h:32:8: error: redefinition of 'struct in6_addr'
+./linux/in6.h:49:8: error: redefinition of 'struct sockaddr_in6'
+./linux/in6.h:59:8: error: redefinition of 'struct ipv6_mreq'
+
+The comments referencing glibc are still correct, but this file is not
+only used for glibc any more.
+
+Signed-off-by: Felix Janda <felix.janda@posteo.de>
+Reviewed-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/libc-compat.h | 55 +++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 54 insertions(+), 1 deletion(-)
+
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -167,46 +167,99 @@
+
+ /* If we did not see any headers from any supported C libraries,
+ * or we are being included in the kernel, then define everything
+- * that we need. */
++ * that we need. Check for previous __UAPI_* definitions to give
++ * unsupported C libraries a way to opt out of any kernel definition. */
+ #else /* !defined(__GLIBC__) */
+
+ /* Definitions for if.h */
++#ifndef __UAPI_DEF_IF_IFCONF
+ #define __UAPI_DEF_IF_IFCONF 1
++#endif
++#ifndef __UAPI_DEF_IF_IFMAP
+ #define __UAPI_DEF_IF_IFMAP 1
++#endif
++#ifndef __UAPI_DEF_IF_IFNAMSIZ
+ #define __UAPI_DEF_IF_IFNAMSIZ 1
++#endif
++#ifndef __UAPI_DEF_IF_IFREQ
+ #define __UAPI_DEF_IF_IFREQ 1
++#endif
+ /* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
++#endif
+ /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
++#ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
++#endif
+
+ /* Definitions for in.h */
++#ifndef __UAPI_DEF_IN_ADDR
+ #define __UAPI_DEF_IN_ADDR 1
++#endif
++#ifndef __UAPI_DEF_IN_IPPROTO
+ #define __UAPI_DEF_IN_IPPROTO 1
++#endif
++#ifndef __UAPI_DEF_IN_PKTINFO
+ #define __UAPI_DEF_IN_PKTINFO 1
++#endif
++#ifndef __UAPI_DEF_IP_MREQ
+ #define __UAPI_DEF_IP_MREQ 1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN
+ #define __UAPI_DEF_SOCKADDR_IN 1
++#endif
++#ifndef __UAPI_DEF_IN_CLASS
+ #define __UAPI_DEF_IN_CLASS 1
++#endif
+
+ /* Definitions for in6.h */
++#ifndef __UAPI_DEF_IN6_ADDR
+ #define __UAPI_DEF_IN6_ADDR 1
++#endif
++#ifndef __UAPI_DEF_IN6_ADDR_ALT
+ #define __UAPI_DEF_IN6_ADDR_ALT 1
++#endif
++#ifndef __UAPI_DEF_SOCKADDR_IN6
+ #define __UAPI_DEF_SOCKADDR_IN6 1
++#endif
++#ifndef __UAPI_DEF_IPV6_MREQ
+ #define __UAPI_DEF_IPV6_MREQ 1
++#endif
++#ifndef __UAPI_DEF_IPPROTO_V6
+ #define __UAPI_DEF_IPPROTO_V6 1
++#endif
++#ifndef __UAPI_DEF_IPV6_OPTIONS
+ #define __UAPI_DEF_IPV6_OPTIONS 1
++#endif
++#ifndef __UAPI_DEF_IN6_PKTINFO
+ #define __UAPI_DEF_IN6_PKTINFO 1
++#endif
++#ifndef __UAPI_DEF_IP6_MTUINFO
+ #define __UAPI_DEF_IP6_MTUINFO 1
++#endif
+
+ /* Definitions for ipx.h */
++#ifndef __UAPI_DEF_SOCKADDR_IPX
+ #define __UAPI_DEF_SOCKADDR_IPX 1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEFINITION
+ #define __UAPI_DEF_IPX_ROUTE_DEFINITION 1
++#endif
++#ifndef __UAPI_DEF_IPX_INTERFACE_DEFINITION
+ #define __UAPI_DEF_IPX_INTERFACE_DEFINITION 1
++#endif
++#ifndef __UAPI_DEF_IPX_CONFIG_DATA
+ #define __UAPI_DEF_IPX_CONFIG_DATA 1
++#endif
++#ifndef __UAPI_DEF_IPX_ROUTE_DEF
+ #define __UAPI_DEF_IPX_ROUTE_DEF 1
++#endif
+
+ /* Definitions for xattr.h */
++#ifndef __UAPI_DEF_XATTR
+ #define __UAPI_DEF_XATTR 1
++#endif
+
+ #endif /* __GLIBC__ */
+
diff --git a/target/linux/generic/backport-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch b/target/linux/generic/backport-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
new file mode 100644
index 0000000000..38697021d5
--- /dev/null
+++ b/target/linux/generic/backport-4.9/272-uapi-if_ether.h-prevent-redefinition-of-struct-ethhd.patch
@@ -0,0 +1,55 @@
+From 649affd04813c43e0a72886517fcfccd63230981 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Mon, 29 Jun 2015 16:53:03 +0200
+Subject: uapi/if_ether.h: prevent redefinition of struct ethhdr
+
+Musl provides its own ethhdr struct definition. Add a guard to prevent
+its definition of the appropriate musl header has already been included.
+
+glibc does not implement this header, but when glibc will implement this
+they can just define __UAPI_DEF_ETHHDR 0 to make it work with the
+kernel.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ include/uapi/linux/if_ether.h | 3 +++
+ include/uapi/linux/libc-compat.h | 6 ++++++
+ 2 files changed, 9 insertions(+)
+
+--- a/include/uapi/linux/if_ether.h
++++ b/include/uapi/linux/if_ether.h
+@@ -22,6 +22,7 @@
+ #define _UAPI_LINUX_IF_ETHER_H
+
+ #include <linux/types.h>
++#include <linux/libc-compat.h>
+
+ /*
+ * IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble
+@@ -138,11 +139,13 @@
+ * This is an Ethernet frame header.
+ */
+
++#if __UAPI_DEF_ETHHDR
+ struct ethhdr {
+ unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
+ unsigned char h_source[ETH_ALEN]; /* source ether addr */
+ __be16 h_proto; /* packet type ID field */
+ } __attribute__((packed));
++#endif
+
+
+ #endif /* _UAPI_LINUX_IF_ETHER_H */
+--- a/include/uapi/linux/libc-compat.h
++++ b/include/uapi/linux/libc-compat.h
+@@ -263,4 +263,10 @@
+
+ #endif /* __GLIBC__ */
+
++/* Definitions for if_ether.h */
++/* allow libcs like musl to deactivate this, glibc does not implement this. */
++#ifndef __UAPI_DEF_ETHHDR
++#define __UAPI_DEF_ETHHDR 1
++#endif
++
+ #endif /* _UAPI_LIBC_COMPAT_H */