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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
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>
622 lines
13 KiB
C
622 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Sysctl interface for parport devices.
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*
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* Authors: David Campbell
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* Tim Waugh <tim@cyberelk.demon.co.uk>
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* Philip Blundell <philb@gnu.org>
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* Andrea Arcangeli
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* Riccardo Facchetti <fizban@tin.it>
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*
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* based on work by Grant Guenther <grant@torque.net>
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* and Philip Blundell
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*
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* Cleaned up include files - Russell King <linux@arm.uk.linux.org>
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*/
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/parport.h>
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#include <linux/ctype.h>
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#include <linux/sysctl.h>
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#include <linux/device.h>
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#include <linux/uaccess.h>
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#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
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#define PARPORT_MIN_TIMESLICE_VALUE 1ul
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#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
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#define PARPORT_MIN_SPINTIME_VALUE 1
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#define PARPORT_MAX_SPINTIME_VALUE 1000
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static int do_active_device(struct ctl_table *table, int write,
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void __user *result, size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[256];
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struct pardevice *dev;
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int len = 0;
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if (write) /* can't happen anyway */
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return -EACCES;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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for (dev = port->devices; dev ; dev = dev->next) {
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if(dev == port->cad) {
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len += sprintf(buffer, "%s\n", dev->name);
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}
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}
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if(!len) {
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len += sprintf(buffer, "%s\n", "none");
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}
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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#ifdef CONFIG_PARPORT_1284
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static int do_autoprobe(struct ctl_table *table, int write,
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void __user *result, size_t *lenp, loff_t *ppos)
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{
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struct parport_device_info *info = table->extra2;
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const char *str;
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char buffer[256];
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int len = 0;
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if (write) /* permissions stop this */
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return -EACCES;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if ((str = info->class_name) != NULL)
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len += sprintf (buffer + len, "CLASS:%s;\n", str);
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if ((str = info->model) != NULL)
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len += sprintf (buffer + len, "MODEL:%s;\n", str);
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if ((str = info->mfr) != NULL)
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len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
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if ((str = info->description) != NULL)
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len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
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if ((str = info->cmdset) != NULL)
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len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user (result, buffer, len) ? -EFAULT : 0;
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}
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#endif /* IEEE1284.3 support. */
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static int do_hardware_base_addr(struct ctl_table *table, int write,
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void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[20];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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static int do_hardware_irq(struct ctl_table *table, int write,
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void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[20];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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len += sprintf (buffer, "%d\n", port->irq);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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static int do_hardware_dma(struct ctl_table *table, int write,
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void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[20];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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len += sprintf (buffer, "%d\n", port->dma);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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static int do_hardware_modes(struct ctl_table *table, int write,
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void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[40];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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{
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#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
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int f = 0;
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printmode(PCSPP);
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printmode(TRISTATE);
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printmode(COMPAT);
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printmode(EPP);
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printmode(ECP);
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printmode(DMA);
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#undef printmode
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}
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buffer[len++] = '\n';
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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#define PARPORT_PORT_DIR(CHILD) { .procname = NULL, .mode = 0555, .child = CHILD }
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#define PARPORT_PARPORT_DIR(CHILD) { .procname = "parport", \
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.mode = 0555, .child = CHILD }
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#define PARPORT_DEV_DIR(CHILD) { .procname = "dev", .mode = 0555, .child = CHILD }
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#define PARPORT_DEVICES_ROOT_DIR { .procname = "devices", \
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.mode = 0555, .child = NULL }
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static const unsigned long parport_min_timeslice_value =
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PARPORT_MIN_TIMESLICE_VALUE;
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static const unsigned long parport_max_timeslice_value =
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PARPORT_MAX_TIMESLICE_VALUE;
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static const int parport_min_spintime_value =
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PARPORT_MIN_SPINTIME_VALUE;
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static const int parport_max_spintime_value =
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PARPORT_MAX_SPINTIME_VALUE;
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struct parport_sysctl_table {
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struct ctl_table_header *sysctl_header;
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struct ctl_table vars[12];
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struct ctl_table device_dir[2];
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struct ctl_table port_dir[2];
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struct ctl_table parport_dir[2];
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struct ctl_table dev_dir[2];
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};
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static const struct parport_sysctl_table parport_sysctl_template = {
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.sysctl_header = NULL,
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{
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{
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.procname = "spintime",
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.data = NULL,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void*) &parport_min_spintime_value,
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.extra2 = (void*) &parport_max_spintime_value
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},
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{
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.procname = "base-addr",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_hardware_base_addr
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},
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{
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.procname = "irq",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_hardware_irq
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},
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{
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.procname = "dma",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_hardware_dma
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},
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{
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.procname = "modes",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_hardware_modes
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},
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PARPORT_DEVICES_ROOT_DIR,
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#ifdef CONFIG_PARPORT_1284
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{
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.procname = "autoprobe",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_autoprobe
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},
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{
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.procname = "autoprobe0",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_autoprobe
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},
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{
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.procname = "autoprobe1",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_autoprobe
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},
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{
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.procname = "autoprobe2",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_autoprobe
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},
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{
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.procname = "autoprobe3",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_autoprobe
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},
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#endif /* IEEE 1284 support */
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{}
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},
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{
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{
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.procname = "active",
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.data = NULL,
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.maxlen = 0,
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.mode = 0444,
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.proc_handler = do_active_device
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},
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{}
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},
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{
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PARPORT_PORT_DIR(NULL),
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{}
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},
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{
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PARPORT_PARPORT_DIR(NULL),
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{}
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},
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{
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PARPORT_DEV_DIR(NULL),
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{}
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}
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};
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struct parport_device_sysctl_table
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{
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struct ctl_table_header *sysctl_header;
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struct ctl_table vars[2];
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struct ctl_table device_dir[2];
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struct ctl_table devices_root_dir[2];
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struct ctl_table port_dir[2];
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struct ctl_table parport_dir[2];
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struct ctl_table dev_dir[2];
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};
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static const struct parport_device_sysctl_table
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parport_device_sysctl_template = {
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.sysctl_header = NULL,
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{
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{
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.procname = "timeslice",
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.data = NULL,
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.maxlen = sizeof(unsigned long),
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.mode = 0644,
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.proc_handler = proc_doulongvec_ms_jiffies_minmax,
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.extra1 = (void*) &parport_min_timeslice_value,
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.extra2 = (void*) &parport_max_timeslice_value
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},
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},
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{
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{
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.procname = NULL,
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.data = NULL,
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.maxlen = 0,
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.mode = 0555,
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.child = NULL
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},
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{}
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},
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{
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PARPORT_DEVICES_ROOT_DIR,
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{}
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},
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{
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PARPORT_PORT_DIR(NULL),
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{}
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},
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{
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PARPORT_PARPORT_DIR(NULL),
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{}
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},
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{
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PARPORT_DEV_DIR(NULL),
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{}
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}
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};
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struct parport_default_sysctl_table
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{
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struct ctl_table_header *sysctl_header;
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struct ctl_table vars[3];
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struct ctl_table default_dir[2];
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struct ctl_table parport_dir[2];
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struct ctl_table dev_dir[2];
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};
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static struct parport_default_sysctl_table
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parport_default_sysctl_table = {
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.sysctl_header = NULL,
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{
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{
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.procname = "timeslice",
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.data = &parport_default_timeslice,
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.maxlen = sizeof(parport_default_timeslice),
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.mode = 0644,
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.proc_handler = proc_doulongvec_ms_jiffies_minmax,
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.extra1 = (void*) &parport_min_timeslice_value,
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.extra2 = (void*) &parport_max_timeslice_value
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},
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{
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.procname = "spintime",
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.data = &parport_default_spintime,
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.maxlen = sizeof(parport_default_spintime),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = (void*) &parport_min_spintime_value,
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.extra2 = (void*) &parport_max_spintime_value
|
|
},
|
|
{}
|
|
},
|
|
{
|
|
{
|
|
.procname = "default",
|
|
.mode = 0555,
|
|
.child = parport_default_sysctl_table.vars
|
|
},
|
|
{}
|
|
},
|
|
{
|
|
PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
|
|
{}
|
|
},
|
|
{
|
|
PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
|
|
{}
|
|
}
|
|
};
|
|
|
|
|
|
int parport_proc_register(struct parport *port)
|
|
{
|
|
struct parport_sysctl_table *t;
|
|
int i;
|
|
|
|
t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL);
|
|
if (t == NULL)
|
|
return -ENOMEM;
|
|
|
|
t->device_dir[0].extra1 = port;
|
|
|
|
for (i = 0; i < 5; i++)
|
|
t->vars[i].extra1 = port;
|
|
|
|
t->vars[0].data = &port->spintime;
|
|
t->vars[5].child = t->device_dir;
|
|
|
|
for (i = 0; i < 5; i++)
|
|
t->vars[6 + i].extra2 = &port->probe_info[i];
|
|
|
|
t->port_dir[0].procname = port->name;
|
|
|
|
t->port_dir[0].child = t->vars;
|
|
t->parport_dir[0].child = t->port_dir;
|
|
t->dev_dir[0].child = t->parport_dir;
|
|
|
|
t->sysctl_header = register_sysctl_table(t->dev_dir);
|
|
if (t->sysctl_header == NULL) {
|
|
kfree(t);
|
|
t = NULL;
|
|
}
|
|
port->sysctl_table = t;
|
|
return 0;
|
|
}
|
|
|
|
int parport_proc_unregister(struct parport *port)
|
|
{
|
|
if (port->sysctl_table) {
|
|
struct parport_sysctl_table *t = port->sysctl_table;
|
|
port->sysctl_table = NULL;
|
|
unregister_sysctl_table(t->sysctl_header);
|
|
kfree(t);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int parport_device_proc_register(struct pardevice *device)
|
|
{
|
|
struct parport_device_sysctl_table *t;
|
|
struct parport * port = device->port;
|
|
|
|
t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
|
|
if (t == NULL)
|
|
return -ENOMEM;
|
|
|
|
t->dev_dir[0].child = t->parport_dir;
|
|
t->parport_dir[0].child = t->port_dir;
|
|
t->port_dir[0].procname = port->name;
|
|
t->port_dir[0].child = t->devices_root_dir;
|
|
t->devices_root_dir[0].child = t->device_dir;
|
|
|
|
t->device_dir[0].procname = device->name;
|
|
t->device_dir[0].child = t->vars;
|
|
t->vars[0].data = &device->timeslice;
|
|
|
|
t->sysctl_header = register_sysctl_table(t->dev_dir);
|
|
if (t->sysctl_header == NULL) {
|
|
kfree(t);
|
|
t = NULL;
|
|
}
|
|
device->sysctl_table = t;
|
|
return 0;
|
|
}
|
|
|
|
int parport_device_proc_unregister(struct pardevice *device)
|
|
{
|
|
if (device->sysctl_table) {
|
|
struct parport_device_sysctl_table *t = device->sysctl_table;
|
|
device->sysctl_table = NULL;
|
|
unregister_sysctl_table(t->sysctl_header);
|
|
kfree(t);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __init parport_default_proc_register(void)
|
|
{
|
|
int ret;
|
|
|
|
parport_default_sysctl_table.sysctl_header =
|
|
register_sysctl_table(parport_default_sysctl_table.dev_dir);
|
|
if (!parport_default_sysctl_table.sysctl_header)
|
|
return -ENOMEM;
|
|
ret = parport_bus_init();
|
|
if (ret) {
|
|
unregister_sysctl_table(parport_default_sysctl_table.
|
|
sysctl_header);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit parport_default_proc_unregister(void)
|
|
{
|
|
if (parport_default_sysctl_table.sysctl_header) {
|
|
unregister_sysctl_table(parport_default_sysctl_table.
|
|
sysctl_header);
|
|
parport_default_sysctl_table.sysctl_header = NULL;
|
|
}
|
|
parport_bus_exit();
|
|
}
|
|
|
|
#else /* no sysctl or no procfs*/
|
|
|
|
int parport_proc_register(struct parport *pp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int parport_proc_unregister(struct parport *pp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int parport_device_proc_register(struct pardevice *device)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int parport_device_proc_unregister(struct pardevice *device)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int __init parport_default_proc_register (void)
|
|
{
|
|
return parport_bus_init();
|
|
}
|
|
|
|
static void __exit parport_default_proc_unregister (void)
|
|
{
|
|
parport_bus_exit();
|
|
}
|
|
#endif
|
|
|
|
subsys_initcall(parport_default_proc_register)
|
|
module_exit(parport_default_proc_unregister)
|