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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is 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. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. 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>
216 lines
5.7 KiB
Bash
Executable File
216 lines
5.7 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Check if current architecture are missing any function calls compared
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# to i386.
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# i386 define a number of legacy system calls that are i386 specific
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# and listed below so they are ignored.
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#
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# Usage:
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# checksyscalls.sh gcc gcc-options
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#
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ignore_list() {
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cat << EOF
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#include <asm/types.h>
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#include <asm/unistd.h>
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/* *at */
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#define __IGNORE_open /* openat */
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#define __IGNORE_link /* linkat */
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#define __IGNORE_unlink /* unlinkat */
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#define __IGNORE_mknod /* mknodat */
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#define __IGNORE_chmod /* fchmodat */
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#define __IGNORE_chown /* fchownat */
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#define __IGNORE_mkdir /* mkdirat */
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#define __IGNORE_rmdir /* unlinkat */
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#define __IGNORE_lchown /* fchownat */
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#define __IGNORE_access /* faccessat */
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#define __IGNORE_rename /* renameat2 */
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#define __IGNORE_readlink /* readlinkat */
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#define __IGNORE_symlink /* symlinkat */
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#define __IGNORE_utimes /* futimesat */
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#if BITS_PER_LONG == 64
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#define __IGNORE_stat /* fstatat */
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#define __IGNORE_lstat /* fstatat */
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#else
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#define __IGNORE_stat64 /* fstatat64 */
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#define __IGNORE_lstat64 /* fstatat64 */
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#endif
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/* Missing flags argument */
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#define __IGNORE_renameat /* renameat2 */
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/* CLOEXEC flag */
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#define __IGNORE_pipe /* pipe2 */
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#define __IGNORE_dup2 /* dup3 */
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#define __IGNORE_epoll_create /* epoll_create1 */
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#define __IGNORE_inotify_init /* inotify_init1 */
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#define __IGNORE_eventfd /* eventfd2 */
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#define __IGNORE_signalfd /* signalfd4 */
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/* MMU */
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#ifndef CONFIG_MMU
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#define __IGNORE_madvise
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#define __IGNORE_mbind
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#define __IGNORE_mincore
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#define __IGNORE_mlock
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#define __IGNORE_mlockall
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#define __IGNORE_munlock
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#define __IGNORE_munlockall
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#define __IGNORE_mprotect
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#define __IGNORE_msync
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#define __IGNORE_migrate_pages
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#define __IGNORE_move_pages
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#define __IGNORE_remap_file_pages
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#define __IGNORE_get_mempolicy
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#define __IGNORE_set_mempolicy
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#define __IGNORE_swapoff
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#define __IGNORE_swapon
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#endif
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/* System calls for 32-bit kernels only */
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#if BITS_PER_LONG == 64
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#define __IGNORE_sendfile64
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#define __IGNORE_ftruncate64
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#define __IGNORE_truncate64
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#define __IGNORE_stat64
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#define __IGNORE_lstat64
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#define __IGNORE_fstat64
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#define __IGNORE_fcntl64
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#define __IGNORE_fadvise64_64
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#define __IGNORE_fstatat64
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#define __IGNORE_fstatfs64
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#define __IGNORE_statfs64
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#define __IGNORE_llseek
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#define __IGNORE_mmap2
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#else
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#define __IGNORE_sendfile
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#define __IGNORE_ftruncate
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#define __IGNORE_truncate
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#define __IGNORE_stat
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#define __IGNORE_lstat
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#define __IGNORE_fstat
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#define __IGNORE_fcntl
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#define __IGNORE_fadvise64
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#define __IGNORE_newfstatat
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#define __IGNORE_fstatfs
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#define __IGNORE_statfs
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#define __IGNORE_lseek
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#define __IGNORE_mmap
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#endif
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/* i386-specific or historical system calls */
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#define __IGNORE_break
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#define __IGNORE_stty
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#define __IGNORE_gtty
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#define __IGNORE_ftime
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#define __IGNORE_prof
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#define __IGNORE_lock
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#define __IGNORE_mpx
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#define __IGNORE_ulimit
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#define __IGNORE_profil
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#define __IGNORE_ioperm
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#define __IGNORE_iopl
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#define __IGNORE_idle
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#define __IGNORE_modify_ldt
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#define __IGNORE_ugetrlimit
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#define __IGNORE_vm86
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#define __IGNORE_vm86old
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#define __IGNORE_set_thread_area
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#define __IGNORE_get_thread_area
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#define __IGNORE_madvise1
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#define __IGNORE_oldstat
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#define __IGNORE_oldfstat
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#define __IGNORE_oldlstat
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#define __IGNORE_oldolduname
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#define __IGNORE_olduname
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#define __IGNORE_umount
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#define __IGNORE_waitpid
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#define __IGNORE_stime
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#define __IGNORE_nice
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#define __IGNORE_signal
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#define __IGNORE_sigaction
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#define __IGNORE_sgetmask
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#define __IGNORE_sigsuspend
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#define __IGNORE_sigpending
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#define __IGNORE_ssetmask
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#define __IGNORE_readdir
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#define __IGNORE_socketcall
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#define __IGNORE_ipc
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#define __IGNORE_sigreturn
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#define __IGNORE_sigprocmask
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#define __IGNORE_bdflush
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#define __IGNORE__llseek
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#define __IGNORE__newselect
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#define __IGNORE_create_module
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#define __IGNORE_query_module
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#define __IGNORE_get_kernel_syms
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#define __IGNORE_sysfs
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#define __IGNORE_uselib
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#define __IGNORE__sysctl
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#define __IGNORE_arch_prctl
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/* ... including the "new" 32-bit uid syscalls */
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#define __IGNORE_lchown32
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#define __IGNORE_getuid32
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#define __IGNORE_getgid32
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#define __IGNORE_geteuid32
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#define __IGNORE_getegid32
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#define __IGNORE_setreuid32
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#define __IGNORE_setregid32
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#define __IGNORE_getgroups32
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#define __IGNORE_setgroups32
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#define __IGNORE_fchown32
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#define __IGNORE_setresuid32
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#define __IGNORE_getresuid32
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#define __IGNORE_setresgid32
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#define __IGNORE_getresgid32
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#define __IGNORE_chown32
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#define __IGNORE_setuid32
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#define __IGNORE_setgid32
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#define __IGNORE_setfsuid32
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#define __IGNORE_setfsgid32
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/* these can be expressed using other calls */
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#define __IGNORE_alarm /* setitimer */
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#define __IGNORE_creat /* open */
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#define __IGNORE_fork /* clone */
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#define __IGNORE_futimesat /* utimensat */
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#define __IGNORE_getpgrp /* getpgid */
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#define __IGNORE_getdents /* getdents64 */
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#define __IGNORE_pause /* sigsuspend */
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#define __IGNORE_poll /* ppoll */
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#define __IGNORE_select /* pselect6 */
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#define __IGNORE_epoll_wait /* epoll_pwait */
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#define __IGNORE_time /* gettimeofday */
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#define __IGNORE_uname /* newuname */
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#define __IGNORE_ustat /* statfs */
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#define __IGNORE_utime /* utimes */
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#define __IGNORE_vfork /* clone */
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/* sync_file_range had a stupid ABI. Allow sync_file_range2 instead */
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#ifdef __NR_sync_file_range2
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#define __IGNORE_sync_file_range
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#endif
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/* Unmerged syscalls for AFS, STREAMS, etc. */
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#define __IGNORE_afs_syscall
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#define __IGNORE_getpmsg
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#define __IGNORE_putpmsg
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#define __IGNORE_vserver
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EOF
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}
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syscall_list() {
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grep '^[0-9]' "$1" | sort -n |
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while read nr abi name entry ; do
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echo "#if !defined(__NR_${name}) && !defined(__IGNORE_${name})"
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echo "#warning syscall ${name} not implemented"
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echo "#endif"
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done
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}
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(ignore_list && syscall_list $(dirname $0)/../arch/x86/entry/syscalls/syscall_32.tbl) | \
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$* -E -x c - > /dev/null
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