License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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>
2017-11-01 17:07:57 +03:00
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// SPDX-License-Identifier: GPL-2.0
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2013-03-10 22:41:10 +04:00
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/*
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* Inspired by breakpoint overflow test done by
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* Vince Weaver <vincent.weaver@maine.edu> for perf_event_tests
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* (git://github.com/deater/perf_event_tests)
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*/
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2013-04-26 21:17:56 +04:00
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/*
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* Powerpc needs __SANE_USERSPACE_TYPES__ before <linux/types.h> to select
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* 'int-ll64.h' and avoid compile warnings when printing __u64 with %llu.
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*/
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#define __SANE_USERSPACE_TYPES__
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2013-03-10 22:41:10 +04:00
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <time.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <sys/mman.h>
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#include <linux/compiler.h>
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#include <linux/hw_breakpoint.h>
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#include "tests.h"
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#include "debug.h"
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2019-08-29 22:18:59 +03:00
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#include "event.h"
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2019-08-29 20:59:50 +03:00
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#include "perf-sys.h"
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2014-07-01 00:28:47 +04:00
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#include "cloexec.h"
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2013-03-10 22:41:10 +04:00
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static int fd1;
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static int fd2;
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2016-01-25 12:55:55 +03:00
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static int fd3;
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2013-03-10 22:41:10 +04:00
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static int overflows;
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2016-01-25 12:55:55 +03:00
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static int overflows_2;
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volatile long the_var;
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/*
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* Use ASM to ensure watchpoint and breakpoint can be triggered
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* at one instruction.
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*/
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#if defined (__x86_64__)
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extern void __test_function(volatile long *ptr);
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asm (
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".globl __test_function\n"
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"__test_function:\n"
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"incq (%rdi)\n"
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"ret\n");
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#else
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static void __test_function(volatile long *ptr)
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{
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*ptr = 0x1234;
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}
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#endif
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2013-03-10 22:41:10 +04:00
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2017-06-16 17:39:15 +03:00
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static noinline int test_function(void)
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2013-03-10 22:41:10 +04:00
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{
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2016-01-25 12:55:55 +03:00
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__test_function(&the_var);
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the_var++;
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2013-03-10 22:41:10 +04:00
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return time(NULL);
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}
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2016-01-25 12:55:55 +03:00
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static void sig_handler_2(int signum __maybe_unused,
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siginfo_t *oh __maybe_unused,
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void *uc __maybe_unused)
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{
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overflows_2++;
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if (overflows_2 > 10) {
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ioctl(fd1, PERF_EVENT_IOC_DISABLE, 0);
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ioctl(fd2, PERF_EVENT_IOC_DISABLE, 0);
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ioctl(fd3, PERF_EVENT_IOC_DISABLE, 0);
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}
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}
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2013-03-10 22:41:10 +04:00
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static void sig_handler(int signum __maybe_unused,
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siginfo_t *oh __maybe_unused,
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void *uc __maybe_unused)
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{
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overflows++;
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if (overflows > 10) {
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/*
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* This should be executed only once during
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* this test, if we are here for the 10th
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* time, consider this the recursive issue.
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*
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* We can get out of here by disable events,
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* so no new SIGIO is delivered.
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*/
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ioctl(fd1, PERF_EVENT_IOC_DISABLE, 0);
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ioctl(fd2, PERF_EVENT_IOC_DISABLE, 0);
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2016-01-25 12:55:55 +03:00
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ioctl(fd3, PERF_EVENT_IOC_DISABLE, 0);
|
2013-03-10 22:41:10 +04:00
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}
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}
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|
2016-02-13 00:30:01 +03:00
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static int __event(bool is_x, void *addr, int sig)
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2013-03-10 22:41:10 +04:00
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{
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struct perf_event_attr pe;
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int fd;
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memset(&pe, 0, sizeof(struct perf_event_attr));
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pe.type = PERF_TYPE_BREAKPOINT;
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pe.size = sizeof(struct perf_event_attr);
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pe.config = 0;
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2016-01-25 12:55:55 +03:00
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pe.bp_type = is_x ? HW_BREAKPOINT_X : HW_BREAKPOINT_W;
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pe.bp_addr = (unsigned long) addr;
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2013-03-10 22:41:10 +04:00
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pe.bp_len = sizeof(long);
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pe.sample_period = 1;
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pe.sample_type = PERF_SAMPLE_IP;
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pe.wakeup_events = 1;
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pe.disabled = 1;
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pe.exclude_kernel = 1;
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pe.exclude_hv = 1;
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2014-07-01 00:28:47 +04:00
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fd = sys_perf_event_open(&pe, 0, -1, -1,
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perf_event_open_cloexec_flag());
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2013-03-10 22:41:10 +04:00
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if (fd < 0) {
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pr_debug("failed opening event %llx\n", pe.config);
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return TEST_FAIL;
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}
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2016-01-25 12:55:55 +03:00
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fcntl(fd, F_SETFL, O_RDWR|O_NONBLOCK|O_ASYNC);
|
2016-02-13 00:30:01 +03:00
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fcntl(fd, F_SETSIG, sig);
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2016-01-25 12:55:55 +03:00
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fcntl(fd, F_SETOWN, getpid());
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2013-03-10 22:41:10 +04:00
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ioctl(fd, PERF_EVENT_IOC_RESET, 0);
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return fd;
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}
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2016-02-13 00:30:01 +03:00
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static int bp_event(void *addr, int sig)
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2016-01-25 12:55:55 +03:00
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{
|
2016-02-13 00:30:01 +03:00
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return __event(true, addr, sig);
|
2016-01-25 12:55:55 +03:00
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}
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2016-02-13 00:30:01 +03:00
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static int wp_event(void *addr, int sig)
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2016-01-25 12:55:55 +03:00
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{
|
2016-02-13 00:30:01 +03:00
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return __event(false, addr, sig);
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2016-01-25 12:55:55 +03:00
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}
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2013-03-10 22:41:10 +04:00
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static long long bp_count(int fd)
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{
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long long count;
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int ret;
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ret = read(fd, &count, sizeof(long long));
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if (ret != sizeof(long long)) {
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pr_debug("failed to read: %d\n", ret);
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return TEST_FAIL;
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}
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return count;
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}
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2017-08-03 21:16:31 +03:00
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int test__bp_signal(struct test *test __maybe_unused, int subtest __maybe_unused)
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2013-03-10 22:41:10 +04:00
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{
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struct sigaction sa;
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2016-01-25 12:55:55 +03:00
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long long count1, count2, count3;
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2013-03-10 22:41:10 +04:00
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/* setup SIGIO signal handler */
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memset(&sa, 0, sizeof(struct sigaction));
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sa.sa_sigaction = (void *) sig_handler;
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sa.sa_flags = SA_SIGINFO;
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if (sigaction(SIGIO, &sa, NULL) < 0) {
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pr_debug("failed setting up signal handler\n");
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return TEST_FAIL;
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}
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2016-01-25 12:55:55 +03:00
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sa.sa_sigaction = (void *) sig_handler_2;
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if (sigaction(SIGUSR1, &sa, NULL) < 0) {
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pr_debug("failed setting up signal handler 2\n");
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return TEST_FAIL;
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}
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2013-03-10 22:41:10 +04:00
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/*
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* We create following events:
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*
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2016-01-25 12:55:55 +03:00
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* fd1 - breakpoint event on __test_function with SIGIO
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2013-03-10 22:41:10 +04:00
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* signal configured. We should get signal
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* notification each time the breakpoint is hit
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*
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2016-01-25 12:55:55 +03:00
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* fd2 - breakpoint event on sig_handler with SIGUSR1
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* configured. We should get SIGUSR1 each time when
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* breakpoint is hit
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*
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* fd3 - watchpoint event on __test_function with SIGIO
|
2013-03-10 22:41:10 +04:00
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* configured.
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*
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* Following processing should happen:
|
2016-01-25 12:55:55 +03:00
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* Exec: Action: Result:
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* incq (%rdi) - fd1 event breakpoint hit -> count1 == 1
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* - SIGIO is delivered
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* sig_handler - fd2 event breakpoint hit -> count2 == 1
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* - SIGUSR1 is delivered
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* sig_handler_2 -> overflows_2 == 1 (nested signal)
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* sys_rt_sigreturn - return from sig_handler_2
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* overflows++ -> overflows = 1
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* sys_rt_sigreturn - return from sig_handler
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* incq (%rdi) - fd3 event watchpoint hit -> count3 == 1 (wp and bp in one insn)
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* - SIGIO is delivered
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* sig_handler - fd2 event breakpoint hit -> count2 == 2
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* - SIGUSR1 is delivered
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* sig_handler_2 -> overflows_2 == 2 (nested signal)
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* sys_rt_sigreturn - return from sig_handler_2
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* overflows++ -> overflows = 2
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* sys_rt_sigreturn - return from sig_handler
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* the_var++ - fd3 event watchpoint hit -> count3 == 2 (standalone watchpoint)
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* - SIGIO is delivered
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* sig_handler - fd2 event breakpoint hit -> count2 == 3
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* - SIGUSR1 is delivered
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* sig_handler_2 -> overflows_2 == 3 (nested signal)
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* sys_rt_sigreturn - return from sig_handler_2
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* overflows++ -> overflows == 3
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* sys_rt_sigreturn - return from sig_handler
|
2013-03-10 22:41:10 +04:00
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*
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* The test case check following error conditions:
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* - we get stuck in signal handler because of debug
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* exception being triggered receursively due to
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* the wrong RF EFLAG management
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*
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* - we never trigger the sig_handler breakpoint due
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* to the rong RF EFLAG management
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*
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*/
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|
2016-01-25 12:55:55 +03:00
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fd1 = bp_event(__test_function, SIGIO);
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fd2 = bp_event(sig_handler, SIGUSR1);
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fd3 = wp_event((void *)&the_var, SIGIO);
|
2013-03-10 22:41:10 +04:00
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ioctl(fd1, PERF_EVENT_IOC_ENABLE, 0);
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ioctl(fd2, PERF_EVENT_IOC_ENABLE, 0);
|
2016-01-25 12:55:55 +03:00
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ioctl(fd3, PERF_EVENT_IOC_ENABLE, 0);
|
2013-03-10 22:41:10 +04:00
|
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|
|
|
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/*
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* Kick off the test by trigering 'fd1'
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* breakpoint.
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*/
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test_function();
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ioctl(fd1, PERF_EVENT_IOC_DISABLE, 0);
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ioctl(fd2, PERF_EVENT_IOC_DISABLE, 0);
|
2016-01-25 12:55:55 +03:00
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ioctl(fd3, PERF_EVENT_IOC_DISABLE, 0);
|
2013-03-10 22:41:10 +04:00
|
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|
count1 = bp_count(fd1);
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count2 = bp_count(fd2);
|
2016-01-25 12:55:55 +03:00
|
|
|
count3 = bp_count(fd3);
|
2013-03-10 22:41:10 +04:00
|
|
|
|
|
|
|
close(fd1);
|
|
|
|
close(fd2);
|
2016-01-25 12:55:55 +03:00
|
|
|
close(fd3);
|
2013-03-10 22:41:10 +04:00
|
|
|
|
2016-01-25 12:55:55 +03:00
|
|
|
pr_debug("count1 %lld, count2 %lld, count3 %lld, overflow %d, overflows_2 %d\n",
|
|
|
|
count1, count2, count3, overflows, overflows_2);
|
2013-03-10 22:41:10 +04:00
|
|
|
|
|
|
|
if (count1 != 1) {
|
|
|
|
if (count1 == 11)
|
|
|
|
pr_debug("failed: RF EFLAG recursion issue detected\n");
|
|
|
|
else
|
|
|
|
pr_debug("failed: wrong count for bp1%lld\n", count1);
|
|
|
|
}
|
|
|
|
|
2016-01-25 12:55:55 +03:00
|
|
|
if (overflows != 3)
|
2013-03-10 22:41:10 +04:00
|
|
|
pr_debug("failed: wrong overflow hit\n");
|
|
|
|
|
2016-01-25 12:55:55 +03:00
|
|
|
if (overflows_2 != 3)
|
|
|
|
pr_debug("failed: wrong overflow_2 hit\n");
|
|
|
|
|
|
|
|
if (count2 != 3)
|
2013-03-10 22:41:10 +04:00
|
|
|
pr_debug("failed: wrong count for bp2\n");
|
|
|
|
|
2016-01-25 12:55:55 +03:00
|
|
|
if (count3 != 2)
|
|
|
|
pr_debug("failed: wrong count for bp3\n");
|
|
|
|
|
|
|
|
return count1 == 1 && overflows == 3 && count2 == 3 && overflows_2 == 3 && count3 == 2 ?
|
2013-03-10 22:41:10 +04:00
|
|
|
TEST_OK : TEST_FAIL;
|
|
|
|
}
|
2017-06-01 23:54:50 +03:00
|
|
|
|
|
|
|
bool test__bp_signal_is_supported(void)
|
|
|
|
{
|
2018-12-03 22:11:36 +03:00
|
|
|
/*
|
|
|
|
* PowerPC and S390 do not support creation of instruction
|
|
|
|
* breakpoints using the perf_event interface.
|
|
|
|
*
|
|
|
|
* ARM requires explicit rounding down of the instruction
|
|
|
|
* pointer in Thumb mode, and then requires the single-step
|
|
|
|
* to be handled explicitly in the overflow handler to avoid
|
|
|
|
* stepping into the SIGIO handler and getting stuck on the
|
|
|
|
* breakpointed instruction.
|
|
|
|
*
|
2019-10-18 11:55:31 +03:00
|
|
|
* Since arm64 has the same issue with arm for the single-step
|
|
|
|
* handling, this case also gets suck on the breakpointed
|
|
|
|
* instruction.
|
|
|
|
*
|
2018-12-03 22:11:36 +03:00
|
|
|
* Just disable the test for these architectures until these
|
|
|
|
* issues are resolved.
|
|
|
|
*/
|
2019-10-18 11:55:31 +03:00
|
|
|
#if defined(__powerpc__) || defined(__s390x__) || defined(__arm__) || \
|
|
|
|
defined(__aarch64__)
|
2017-06-01 23:54:50 +03:00
|
|
|
return false;
|
|
|
|
#else
|
|
|
|
return true;
|
|
|
|
#endif
|
|
|
|
}
|