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 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2005-04-17 06:20:36 +08:00
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#ifndef _VT_KERN_H
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#define _VT_KERN_H
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/*
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* this really is an extension of the vc_cons structure in console.c, but
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* with information needed by the vt package
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*/
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#include <linux/vt.h>
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#include <linux/kd.h>
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#include <linux/tty.h>
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2007-05-08 15:39:49 +08:00
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#include <linux/mutex.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/console_struct.h>
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#include <linux/mm.h>
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2008-06-03 21:59:40 +08:00
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#include <linux/consolemap.h>
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2009-09-20 04:13:25 +08:00
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#include <linux/notifier.h>
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2005-04-17 06:20:36 +08:00
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/*
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* Presently, a lot of graphics programs do not restore the contents of
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* the higher font pages. Defining this flag will avoid use of them, but
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* will lose support for PIO_FONTRESET. Note that many font operations are
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* not likely to work with these programs anyway; they need to be
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* fixed. The linux/Documentation directory includes a code snippet
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* to save and restore the text font.
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*/
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#ifdef CONFIG_VGA_CONSOLE
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#define BROKEN_GRAPHICS_PROGRAMS 1
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#endif
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2020-02-19 15:39:49 +08:00
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void kd_mksound(unsigned int hz, unsigned int ticks);
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int kbd_rate(struct kbd_repeat *rep);
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2006-07-10 19:44:12 +08:00
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extern int fg_console, last_console, want_console;
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2005-04-17 06:20:36 +08:00
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/* console.c */
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int vc_allocate(unsigned int console);
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int vc_cons_allocated(unsigned int console);
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int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines);
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tty/vt: Fix vc_deallocate() lock order
Now that the tty port owns the flip buffers and i/o is allowed
from the driver even when no tty is attached, the destruction
of the tty port (and the flip buffers) must ensure that no
outstanding work is pending.
Unfortunately, this creates a lock order problem with the
console_lock (see attached lockdep report [1] below).
For single console deallocation, drop the console_lock prior
to port destruction. When multiple console deallocation,
defer port destruction until the consoles have been
deallocated.
tty_port_destroy() is not required if the port has not
been used; remove from vc_allocate() failure path.
[1] lockdep report from Dave Jones <davej@redhat.com>
======================================================
[ INFO: possible circular locking dependency detected ]
3.9.0+ #16 Not tainted
-------------------------------------------------------
(agetty)/26163 is trying to acquire lock:
blocked: ((&buf->work)){+.+...}, instance: ffff88011c8b0020, at: [<ffffffff81062065>] flush_work+0x5/0x2e0
but task is already holding lock:
blocked: (console_lock){+.+.+.}, instance: ffffffff81c2fde0, at: [<ffffffff813bc201>] vt_ioctl+0xb61/0x1230
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (console_lock){+.+.+.}:
[<ffffffff810b3f74>] lock_acquire+0xa4/0x210
[<ffffffff810416c7>] console_lock+0x77/0x80
[<ffffffff813c3dcd>] con_flush_chars+0x2d/0x50
[<ffffffff813b32b2>] n_tty_receive_buf+0x122/0x14d0
[<ffffffff813b7709>] flush_to_ldisc+0x119/0x170
[<ffffffff81064381>] process_one_work+0x211/0x700
[<ffffffff8106498b>] worker_thread+0x11b/0x3a0
[<ffffffff8106ce5d>] kthread+0xed/0x100
[<ffffffff81601cac>] ret_from_fork+0x7c/0xb0
-> #0 ((&buf->work)){+.+...}:
[<ffffffff810b349a>] __lock_acquire+0x193a/0x1c00
[<ffffffff810b3f74>] lock_acquire+0xa4/0x210
[<ffffffff810620ae>] flush_work+0x4e/0x2e0
[<ffffffff81065305>] __cancel_work_timer+0x95/0x130
[<ffffffff810653b0>] cancel_work_sync+0x10/0x20
[<ffffffff813b8212>] tty_port_destroy+0x12/0x20
[<ffffffff813c65e8>] vc_deallocate+0xf8/0x110
[<ffffffff813bc20c>] vt_ioctl+0xb6c/0x1230
[<ffffffff813b01a5>] tty_ioctl+0x285/0xd50
[<ffffffff811ba825>] do_vfs_ioctl+0x305/0x530
[<ffffffff811baad1>] sys_ioctl+0x81/0xa0
[<ffffffff81601d59>] system_call_fastpath+0x16/0x1b
other info that might help us debug this:
[ 6760.076175] Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(console_lock);
lock((&buf->work));
lock(console_lock);
lock((&buf->work));
*** DEADLOCK ***
1 lock on stack by (agetty)/26163:
#0: blocked: (console_lock){+.+.+.}, instance: ffffffff81c2fde0, at: [<ffffffff813bc201>] vt_ioctl+0xb61/0x1230
stack backtrace:
Pid: 26163, comm: (agetty) Not tainted 3.9.0+ #16
Call Trace:
[<ffffffff815edb14>] print_circular_bug+0x200/0x20e
[<ffffffff810b349a>] __lock_acquire+0x193a/0x1c00
[<ffffffff8100a269>] ? sched_clock+0x9/0x10
[<ffffffff8100a269>] ? sched_clock+0x9/0x10
[<ffffffff8100a200>] ? native_sched_clock+0x20/0x80
[<ffffffff810b3f74>] lock_acquire+0xa4/0x210
[<ffffffff81062065>] ? flush_work+0x5/0x2e0
[<ffffffff810620ae>] flush_work+0x4e/0x2e0
[<ffffffff81062065>] ? flush_work+0x5/0x2e0
[<ffffffff810b15db>] ? mark_held_locks+0xbb/0x140
[<ffffffff8113c8a3>] ? __free_pages_ok.part.57+0x93/0xc0
[<ffffffff810b15db>] ? mark_held_locks+0xbb/0x140
[<ffffffff810652f2>] ? __cancel_work_timer+0x82/0x130
[<ffffffff81065305>] __cancel_work_timer+0x95/0x130
[<ffffffff810653b0>] cancel_work_sync+0x10/0x20
[<ffffffff813b8212>] tty_port_destroy+0x12/0x20
[<ffffffff813c65e8>] vc_deallocate+0xf8/0x110
[<ffffffff813bc20c>] vt_ioctl+0xb6c/0x1230
[<ffffffff810aec41>] ? lock_release_holdtime.part.30+0xa1/0x170
[<ffffffff813b01a5>] tty_ioctl+0x285/0xd50
[<ffffffff812b00f6>] ? inode_has_perm.isra.46.constprop.61+0x56/0x80
[<ffffffff811ba825>] do_vfs_ioctl+0x305/0x530
[<ffffffff812b04db>] ? selinux_file_ioctl+0x5b/0x110
[<ffffffff811baad1>] sys_ioctl+0x81/0xa0
[<ffffffff81601d59>] system_call_fastpath+0x16/0x1b
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-18 00:41:03 +08:00
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struct vc_data *vc_deallocate(unsigned int console);
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2005-04-17 06:20:36 +08:00
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void reset_palette(struct vc_data *vc);
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void do_blank_screen(int entering_gfx);
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void do_unblank_screen(int leaving_gfx);
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void unblank_screen(void);
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void poke_blanked_console(void);
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int con_font_op(struct vc_data *vc, struct console_font_op *op);
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int con_set_cmap(unsigned char __user *cmap);
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int con_get_cmap(unsigned char __user *cmap);
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2016-06-23 19:34:23 +08:00
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void scrollback(struct vc_data *vc);
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2005-04-17 06:20:36 +08:00
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void scrollfront(struct vc_data *vc, int lines);
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2013-01-24 12:14:19 +08:00
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void clear_buffer_attributes(struct vc_data *vc);
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2005-04-17 06:20:36 +08:00
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void update_region(struct vc_data *vc, unsigned long start, int count);
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void redraw_screen(struct vc_data *vc, int is_switch);
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#define update_screen(x) redraw_screen(x, 0)
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#define switch_screen(x) redraw_screen(x, 1)
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struct tty_struct;
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int tioclinux(struct tty_struct *tty, unsigned long arg);
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2008-06-03 21:59:40 +08:00
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#ifdef CONFIG_CONSOLE_TRANSLATIONS
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2005-04-17 06:20:36 +08:00
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/* consolemap.c */
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struct unipair;
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int con_set_trans_old(unsigned char __user * table);
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int con_get_trans_old(unsigned char __user * table);
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int con_set_trans_new(unsigned short __user * table);
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int con_get_trans_new(unsigned short __user * table);
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2016-06-23 19:34:36 +08:00
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int con_clear_unimap(struct vc_data *vc);
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2005-04-17 06:20:36 +08:00
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int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
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int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
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int con_set_default_unimap(struct vc_data *vc);
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void con_free_unimap(struct vc_data *vc);
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int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc);
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2008-06-03 21:59:40 +08:00
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#else
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2010-07-11 05:57:56 +08:00
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static inline int con_set_trans_old(unsigned char __user *table)
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{
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return 0;
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}
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static inline int con_get_trans_old(unsigned char __user *table)
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{
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return -EINVAL;
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}
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static inline int con_set_trans_new(unsigned short __user *table)
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{
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return 0;
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}
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static inline int con_get_trans_new(unsigned short __user *table)
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{
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return -EINVAL;
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}
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2016-06-23 19:34:36 +08:00
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static inline int con_clear_unimap(struct vc_data *vc)
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2010-07-11 05:57:56 +08:00
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{
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return 0;
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}
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static inline
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int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
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{
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return 0;
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}
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static inline
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int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
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struct unipair __user *list)
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{
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return -EINVAL;
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}
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static inline int con_set_default_unimap(struct vc_data *vc)
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{
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return 0;
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}
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static inline void con_free_unimap(struct vc_data *vc)
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{
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}
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static inline void con_protect_unimap(struct vc_data *vc, int rdonly)
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{
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}
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static inline
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int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
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{
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return 0;
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}
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2008-06-03 21:59:40 +08:00
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#endif
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2005-04-17 06:20:36 +08:00
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/* vt.c */
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2009-09-20 04:13:24 +08:00
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void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
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int vt_waitactive(int n);
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2005-04-17 06:20:36 +08:00
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void change_console(struct vc_data *new_vc);
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void reset_vc(struct vc_data *vc);
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2020-02-19 15:39:49 +08:00
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int do_unbind_con_driver(const struct consw *csw, int first, int last,
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int deflt);
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2008-10-13 17:41:42 +08:00
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int vty_init(const struct file_operations *console_fops);
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2005-04-17 06:20:36 +08:00
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2020-02-19 15:39:48 +08:00
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extern bool vt_dont_switch;
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2007-10-17 14:29:38 +08:00
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extern int default_utf8;
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2009-11-14 04:14:11 +08:00
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extern int global_cursor_default;
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2005-04-17 06:20:36 +08:00
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2006-10-02 17:17:13 +08:00
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struct vt_spawn_console {
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spinlock_t lock;
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struct pid *pid;
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int sig;
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};
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extern struct vt_spawn_console vt_spawn_con;
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2020-02-19 15:39:49 +08:00
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int vt_move_to_console(unsigned int vt, int alloc);
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2009-09-20 04:13:25 +08:00
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/* Interfaces for VC notification of character events (for accessibility etc) */
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struct vt_notifier_param {
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struct vc_data *vc; /* VC on which the update happened */
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unsigned int c; /* Printed char */
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};
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2020-02-19 15:39:49 +08:00
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int register_vt_notifier(struct notifier_block *nb);
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int unregister_vt_notifier(struct notifier_block *nb);
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2009-09-20 04:13:25 +08:00
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2020-02-19 15:39:49 +08:00
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void hide_boot_cursor(bool hide);
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2009-11-14 04:14:11 +08:00
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2012-02-24 20:47:11 +08:00
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/* keyboard provided interfaces */
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2020-02-19 15:39:49 +08:00
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int vt_do_diacrit(unsigned int cmd, void __user *up, int eperm);
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int vt_do_kdskbmode(int console, unsigned int arg);
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int vt_do_kdskbmeta(int console, unsigned int arg);
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int vt_do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc,
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int perm);
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int vt_do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm,
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int console);
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int vt_do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm);
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int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm);
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int vt_do_kdgkbmode(int console);
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int vt_do_kdgkbmeta(int console);
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void vt_reset_unicode(int console);
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int vt_get_shift_state(void);
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void vt_reset_keyboard(int console);
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int vt_get_leds(int console, int flag);
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int vt_get_kbd_mode_bit(int console, int bit);
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void vt_set_kbd_mode_bit(int console, int bit);
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void vt_clr_kbd_mode_bit(int console, int bit);
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void vt_set_led_state(int console, int leds);
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void vt_set_led_state(int console, int leds);
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void vt_kbd_con_start(int console);
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void vt_kbd_con_stop(int console);
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2012-02-28 22:49:23 +08:00
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2016-10-03 17:18:35 +08:00
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void vc_scrolldelta_helper(struct vc_data *c, int lines,
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unsigned int rolled_over, void *_base, unsigned int size);
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2012-02-24 20:47:11 +08:00
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2005-04-17 06:20:36 +08:00
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#endif /* _VT_KERN_H */
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