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| author | Carlos O'Donell <carlos@redhat.com> | 2016-06-07 04:46:37 -0400 |
|---|---|---|
| committer | Carlos O'Donell <carlos@redhat.com> | 2016-06-07 04:46:37 -0400 |
| commit | c9bd40daaee18cf1d9824e4a7ebaebe321e0a5a8 (patch) | |
| tree | 74691eecf1193dda1522f553bce5a198bedd796b /sysdeps/unix/sysv/linux | |
| parent | 47dd3543d36465496970406da03db5aecdc377ee (diff) | |
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Bug 20214: Fix linux/in6.h and netinet/in.h sync.
In: https://sourceware.org/glibc/wiki/Synchronizing_Headers
we explain how we synchronize our headers with Linux kernel
headers.
In order to synchronize with the Linux linux/in6.h and
linux/ipv6.h headers we checked for their guard macros and
then defined __USE_KERNEL_IPV6_DEFS and conditionalized code
on this macro.
In upstream kernel 56c176c9 the _UAPI prefix was stripped and
this broke our synchronized headers again. We now need to check
for _LINUX_IN6_H and _IPV6_H, and keep checking the old versions
of the header guard checks for maximum backwards compatibility
with older Linux headers (the history is actually a bit muddled
here and it appears upstream linus kernel broke this 10 months
*before* our fix was ever applied to glibc, but without glibc
testing we didn't notice and distro kernels have their own
testing to fix this).
This patch fixes synchronization with linux/in6.h and
with netinet/in.h.
Diffstat (limited to 'sysdeps/unix/sysv/linux')
| -rw-r--r-- | sysdeps/unix/sysv/linux/bits/in.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/in.h b/sysdeps/unix/sysv/linux/bits/in.h index 9bdadf3c8f..4d70a6baba 100644 --- a/sysdeps/unix/sysv/linux/bits/in.h +++ b/sysdeps/unix/sysv/linux/bits/in.h @@ -25,8 +25,14 @@ kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the defines), sockaddr_in6, or ipv6_mreq. Same for in6_ptkinfo or ip6_mtuinfo in linux/ipv6.h. The ABI used by the linux-kernel and glibc match exactly. - Neither the linux kernel nor glibc should break this ABI without coordination. */ -#if defined _UAPI_LINUX_IN6_H || defined _UAPI_IPV6_H + Neither the linux kernel nor glibc should break this ABI without coordination. + In upstream kernel 56c176c9 the _UAPI prefix was stripped so we need to check + for _LINUX_IN6_H and _IPV6_H now, and keep checking the old versions for + maximum backwards compatibility. */ +#if defined _UAPI_LINUX_IN6_H \ + || defined _UAPI_IPV6_H \ + || defined _LINUX_IN6_H \ + || defined _IPV6_H /* This is not quite the same API since the kernel always defines s6_addr16 and s6_addr32. This is not a violation of POSIX since POSIX says "at least the following member" and that holds true. */ @@ -209,8 +215,10 @@ struct in_pktinfo #define IPV6_TCLASS 67 /* Obsolete synonyms for the above. */ -#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP -#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP +#if !__USE_KERNEL_IPV6_DEFS +# define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP +# define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP +#endif #define IPV6_RXHOPOPTS IPV6_HOPOPTS #define IPV6_RXDSTOPTS IPV6_DSTOPTS |