mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-09 01:59:41 +00:00
6f52b16c5b
Many user space API headers are missing licensing information, which makes it hard for compliance tools to determine the correct license. By default are files without license information under the default license of the kernel, which is GPLV2. Marking them GPLV2 would exclude them from being included in non GPLV2 code, which is obviously not intended. The user space API headers fall under the syscall exception which is in the kernels COPYING file: NOTE! This copyright does *not* cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does *not* fall under the heading of "derived work". otherwise syscall usage would not be possible. Update the files which contain no license information with an SPDX license identifier. The chosen identifier is 'GPL-2.0 WITH Linux-syscall-note' which is the officially assigned identifier for the Linux syscall exception. SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
214 lines
7 KiB
C
214 lines
7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
* Compatibility interface for userspace libc header coordination:
|
|
*
|
|
* Define compatibility macros that are used to control the inclusion or
|
|
* exclusion of UAPI structures and definitions in coordination with another
|
|
* userspace C library.
|
|
*
|
|
* This header is intended to solve the problem of UAPI definitions that
|
|
* conflict with userspace definitions. If a UAPI header has such conflicting
|
|
* definitions then the solution is as follows:
|
|
*
|
|
* * Synchronize the UAPI header and the libc headers so either one can be
|
|
* used and such that the ABI is preserved. If this is not possible then
|
|
* no simple compatibility interface exists (you need to write translating
|
|
* wrappers and rename things) and you can't use this interface.
|
|
*
|
|
* Then follow this process:
|
|
*
|
|
* (a) Include libc-compat.h in the UAPI header.
|
|
* e.g. #include <linux/libc-compat.h>
|
|
* This include must be as early as possible.
|
|
*
|
|
* (b) In libc-compat.h add enough code to detect that the comflicting
|
|
* userspace libc header has been included first.
|
|
*
|
|
* (c) If the userspace libc header has been included first define a set of
|
|
* guard macros of the form __UAPI_DEF_FOO and set their values to 1, else
|
|
* set their values to 0.
|
|
*
|
|
* (d) Back in the UAPI header with the conflicting definitions, guard the
|
|
* definitions with:
|
|
* #if __UAPI_DEF_FOO
|
|
* ...
|
|
* #endif
|
|
*
|
|
* This fixes the situation where the linux headers are included *after* the
|
|
* libc headers. To fix the problem with the inclusion in the other order the
|
|
* userspace libc headers must be fixed like this:
|
|
*
|
|
* * For all definitions that conflict with kernel definitions wrap those
|
|
* defines in the following:
|
|
* #if !__UAPI_DEF_FOO
|
|
* ...
|
|
* #endif
|
|
*
|
|
* This prevents the redefinition of a construct already defined by the kernel.
|
|
*/
|
|
#ifndef _UAPI_LIBC_COMPAT_H
|
|
#define _UAPI_LIBC_COMPAT_H
|
|
|
|
/* We have included glibc headers... */
|
|
#if defined(__GLIBC__)
|
|
|
|
/* Coordinate with glibc net/if.h header. */
|
|
#if defined(_NET_IF_H) && defined(__USE_MISC)
|
|
|
|
/* GLIBC headers included first so don't define anything
|
|
* that would already be defined. */
|
|
|
|
#define __UAPI_DEF_IF_IFCONF 0
|
|
#define __UAPI_DEF_IF_IFMAP 0
|
|
#define __UAPI_DEF_IF_IFNAMSIZ 0
|
|
#define __UAPI_DEF_IF_IFREQ 0
|
|
/* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
|
|
#define __UAPI_DEF_IF_NET_DEVICE_FLAGS 0
|
|
/* 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 /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
|
|
|
|
#else /* _NET_IF_H */
|
|
|
|
/* Linux headers included first, and we must define everything
|
|
* we need. The expectation is that glibc will check the
|
|
* __UAPI_DEF_* defines and adjust appropriately. */
|
|
|
|
#define __UAPI_DEF_IF_IFCONF 1
|
|
#define __UAPI_DEF_IF_IFMAP 1
|
|
#define __UAPI_DEF_IF_IFNAMSIZ 1
|
|
#define __UAPI_DEF_IF_IFREQ 1
|
|
/* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
|
|
#define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
|
|
/* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
|
|
#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
|
|
|
|
#endif /* _NET_IF_H */
|
|
|
|
/* Coordinate with glibc netinet/in.h header. */
|
|
#if defined(_NETINET_IN_H)
|
|
|
|
/* GLIBC headers included first so don't define anything
|
|
* that would already be defined. */
|
|
#define __UAPI_DEF_IN_ADDR 0
|
|
#define __UAPI_DEF_IN_IPPROTO 0
|
|
#define __UAPI_DEF_IN_PKTINFO 0
|
|
#define __UAPI_DEF_IP_MREQ 0
|
|
#define __UAPI_DEF_SOCKADDR_IN 0
|
|
#define __UAPI_DEF_IN_CLASS 0
|
|
|
|
#define __UAPI_DEF_IN6_ADDR 0
|
|
/* The exception is the in6_addr macros which must be defined
|
|
* if the glibc code didn't define them. This guard matches
|
|
* the guard in glibc/inet/netinet/in.h which defines the
|
|
* additional in6_addr macros e.g. s6_addr16, and s6_addr32. */
|
|
#if defined(__USE_MISC) || defined (__USE_GNU)
|
|
#define __UAPI_DEF_IN6_ADDR_ALT 0
|
|
#else
|
|
#define __UAPI_DEF_IN6_ADDR_ALT 1
|
|
#endif
|
|
#define __UAPI_DEF_SOCKADDR_IN6 0
|
|
#define __UAPI_DEF_IPV6_MREQ 0
|
|
#define __UAPI_DEF_IPPROTO_V6 0
|
|
#define __UAPI_DEF_IPV6_OPTIONS 0
|
|
#define __UAPI_DEF_IN6_PKTINFO 0
|
|
#define __UAPI_DEF_IP6_MTUINFO 0
|
|
|
|
#else
|
|
|
|
/* Linux headers included first, and we must define everything
|
|
* we need. The expectation is that glibc will check the
|
|
* __UAPI_DEF_* defines and adjust appropriately. */
|
|
#define __UAPI_DEF_IN_ADDR 1
|
|
#define __UAPI_DEF_IN_IPPROTO 1
|
|
#define __UAPI_DEF_IN_PKTINFO 1
|
|
#define __UAPI_DEF_IP_MREQ 1
|
|
#define __UAPI_DEF_SOCKADDR_IN 1
|
|
#define __UAPI_DEF_IN_CLASS 1
|
|
|
|
#define __UAPI_DEF_IN6_ADDR 1
|
|
/* We unconditionally define the in6_addr macros and glibc must
|
|
* coordinate. */
|
|
#define __UAPI_DEF_IN6_ADDR_ALT 1
|
|
#define __UAPI_DEF_SOCKADDR_IN6 1
|
|
#define __UAPI_DEF_IPV6_MREQ 1
|
|
#define __UAPI_DEF_IPPROTO_V6 1
|
|
#define __UAPI_DEF_IPV6_OPTIONS 1
|
|
#define __UAPI_DEF_IN6_PKTINFO 1
|
|
#define __UAPI_DEF_IP6_MTUINFO 1
|
|
|
|
#endif /* _NETINET_IN_H */
|
|
|
|
/* Coordinate with glibc netipx/ipx.h header. */
|
|
#if defined(__NETIPX_IPX_H)
|
|
|
|
#define __UAPI_DEF_SOCKADDR_IPX 0
|
|
#define __UAPI_DEF_IPX_ROUTE_DEFINITION 0
|
|
#define __UAPI_DEF_IPX_INTERFACE_DEFINITION 0
|
|
#define __UAPI_DEF_IPX_CONFIG_DATA 0
|
|
#define __UAPI_DEF_IPX_ROUTE_DEF 0
|
|
|
|
#else /* defined(__NETIPX_IPX_H) */
|
|
|
|
#define __UAPI_DEF_SOCKADDR_IPX 1
|
|
#define __UAPI_DEF_IPX_ROUTE_DEFINITION 1
|
|
#define __UAPI_DEF_IPX_INTERFACE_DEFINITION 1
|
|
#define __UAPI_DEF_IPX_CONFIG_DATA 1
|
|
#define __UAPI_DEF_IPX_ROUTE_DEF 1
|
|
|
|
#endif /* defined(__NETIPX_IPX_H) */
|
|
|
|
/* Definitions for xattr.h */
|
|
#if defined(_SYS_XATTR_H)
|
|
#define __UAPI_DEF_XATTR 0
|
|
#else
|
|
#define __UAPI_DEF_XATTR 1
|
|
#endif
|
|
|
|
/* 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. */
|
|
#else /* !defined(__GLIBC__) */
|
|
|
|
/* Definitions for if.h */
|
|
#define __UAPI_DEF_IF_IFCONF 1
|
|
#define __UAPI_DEF_IF_IFMAP 1
|
|
#define __UAPI_DEF_IF_IFNAMSIZ 1
|
|
#define __UAPI_DEF_IF_IFREQ 1
|
|
/* Everything up to IFF_DYNAMIC, matches net/if.h until glibc 2.23 */
|
|
#define __UAPI_DEF_IF_NET_DEVICE_FLAGS 1
|
|
/* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */
|
|
#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1
|
|
|
|
/* Definitions for in.h */
|
|
#define __UAPI_DEF_IN_ADDR 1
|
|
#define __UAPI_DEF_IN_IPPROTO 1
|
|
#define __UAPI_DEF_IN_PKTINFO 1
|
|
#define __UAPI_DEF_IP_MREQ 1
|
|
#define __UAPI_DEF_SOCKADDR_IN 1
|
|
#define __UAPI_DEF_IN_CLASS 1
|
|
|
|
/* Definitions for in6.h */
|
|
#define __UAPI_DEF_IN6_ADDR 1
|
|
#define __UAPI_DEF_IN6_ADDR_ALT 1
|
|
#define __UAPI_DEF_SOCKADDR_IN6 1
|
|
#define __UAPI_DEF_IPV6_MREQ 1
|
|
#define __UAPI_DEF_IPPROTO_V6 1
|
|
#define __UAPI_DEF_IPV6_OPTIONS 1
|
|
#define __UAPI_DEF_IN6_PKTINFO 1
|
|
#define __UAPI_DEF_IP6_MTUINFO 1
|
|
|
|
/* Definitions for ipx.h */
|
|
#define __UAPI_DEF_SOCKADDR_IPX 1
|
|
#define __UAPI_DEF_IPX_ROUTE_DEFINITION 1
|
|
#define __UAPI_DEF_IPX_INTERFACE_DEFINITION 1
|
|
#define __UAPI_DEF_IPX_CONFIG_DATA 1
|
|
#define __UAPI_DEF_IPX_ROUTE_DEF 1
|
|
|
|
/* Definitions for xattr.h */
|
|
#define __UAPI_DEF_XATTR 1
|
|
|
|
#endif /* __GLIBC__ */
|
|
|
|
#endif /* _UAPI_LIBC_COMPAT_H */
|