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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>
477 lines
12 KiB
C
477 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* cdrom.c IOCTLs handling for ide-cd driver.
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*
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* Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
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* Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
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* Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
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*/
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#include <linux/kernel.h>
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#include <linux/cdrom.h>
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#include <linux/gfp.h>
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#include <linux/ide.h>
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#include <scsi/scsi.h>
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#include "ide-cd.h"
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/****************************************************************************
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* Other driver requests (open, close, check media change).
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*/
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int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
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{
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return 0;
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}
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/*
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* Close down the device. Invalidate all cached blocks.
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*/
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void ide_cdrom_release_real(struct cdrom_device_info *cdi)
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{
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ide_drive_t *drive = cdi->handle;
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if (!cdi->use_count)
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drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
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}
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/*
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* add logic to try GET_EVENT command first to check for media and tray
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* status. this should be supported by newer cd-r/w and all DVD etc
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* drives
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*/
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int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
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{
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ide_drive_t *drive = cdi->handle;
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struct media_event_desc med;
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struct request_sense sense;
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int stat;
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if (slot_nr != CDSL_CURRENT)
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return -EINVAL;
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stat = cdrom_check_status(drive, &sense);
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if (!stat || sense.sense_key == UNIT_ATTENTION)
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return CDS_DISC_OK;
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if (!cdrom_get_media_event(cdi, &med)) {
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if (med.media_present)
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return CDS_DISC_OK;
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else if (med.door_open)
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return CDS_TRAY_OPEN;
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else
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return CDS_NO_DISC;
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}
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if (sense.sense_key == NOT_READY && sense.asc == 0x04
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&& sense.ascq == 0x04)
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return CDS_DISC_OK;
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/*
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* If not using Mt Fuji extended media tray reports,
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* just return TRAY_OPEN since ATAPI doesn't provide
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* any other way to detect this...
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*/
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if (sense.sense_key == NOT_READY) {
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if (sense.asc == 0x3a && sense.ascq == 1)
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return CDS_NO_DISC;
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else
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return CDS_TRAY_OPEN;
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}
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return CDS_DRIVE_NOT_READY;
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}
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/*
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* ide-cd always generates media changed event if media is missing, which
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* makes it impossible to use for proper event reporting, so disk->events
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* is cleared to 0 and the following function is used only to trigger
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* revalidation and never propagated to userland.
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*/
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unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
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unsigned int clearing, int slot_nr)
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{
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ide_drive_t *drive = cdi->handle;
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int retval;
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if (slot_nr == CDSL_CURRENT) {
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(void) cdrom_check_status(drive, NULL);
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retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
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drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
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return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
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} else {
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return 0;
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}
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}
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/* Eject the disk if EJECTFLAG is 0.
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If EJECTFLAG is 1, try to reload the disk. */
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static
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int cdrom_eject(ide_drive_t *drive, int ejectflag,
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struct request_sense *sense)
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{
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struct cdrom_info *cd = drive->driver_data;
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struct cdrom_device_info *cdi = &cd->devinfo;
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char loej = 0x02;
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unsigned char cmd[BLK_MAX_CDB];
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if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
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return -EDRIVE_CANT_DO_THIS;
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/* reload fails on some drives, if the tray is locked */
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if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
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return 0;
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/* only tell drive to close tray if open, if it can do that */
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if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
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loej = 0;
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_START_STOP_UNIT;
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cmd[4] = loej | (ejectflag != 0);
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return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
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}
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/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
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static
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int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
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struct request_sense *sense)
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{
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struct request_sense my_sense;
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int stat;
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if (sense == NULL)
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sense = &my_sense;
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/* If the drive cannot lock the door, just pretend. */
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if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
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stat = 0;
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} else {
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unsigned char cmd[BLK_MAX_CDB];
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
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cmd[4] = lockflag ? 1 : 0;
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stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
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sense, 0, 0);
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}
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/* If we got an illegal field error, the drive
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probably cannot lock the door. */
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if (stat != 0 &&
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sense->sense_key == ILLEGAL_REQUEST &&
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(sense->asc == 0x24 || sense->asc == 0x20)) {
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printk(KERN_ERR "%s: door locking not supported\n",
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drive->name);
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drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
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stat = 0;
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}
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/* no medium, that's alright. */
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if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
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stat = 0;
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if (stat == 0) {
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if (lockflag)
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drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
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else
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drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
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}
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return stat;
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}
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int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
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{
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ide_drive_t *drive = cdi->handle;
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struct request_sense sense;
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if (position) {
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int stat = ide_cd_lockdoor(drive, 0, &sense);
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if (stat)
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return stat;
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}
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return cdrom_eject(drive, !position, &sense);
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}
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int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
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{
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ide_drive_t *drive = cdi->handle;
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return ide_cd_lockdoor(drive, lock, NULL);
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}
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/*
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* ATAPI devices are free to select the speed you request or any slower
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* rate. :-( Requesting too fast a speed will _not_ produce an error.
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*/
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int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
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{
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ide_drive_t *drive = cdi->handle;
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struct cdrom_info *cd = drive->driver_data;
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struct request_sense sense;
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u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
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int stat;
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unsigned char cmd[BLK_MAX_CDB];
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if (speed == 0)
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speed = 0xffff; /* set to max */
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else
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speed *= 177; /* Nx to kbytes/s */
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_SET_SPEED;
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/* Read Drive speed in kbytes/second MSB/LSB */
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cmd[2] = (speed >> 8) & 0xff;
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cmd[3] = speed & 0xff;
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if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
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(CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
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/* Write Drive speed in kbytes/second MSB/LSB */
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cmd[4] = (speed >> 8) & 0xff;
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cmd[5] = speed & 0xff;
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}
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stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
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if (!ide_cdrom_get_capabilities(drive, buf)) {
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ide_cdrom_update_speed(drive, buf);
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cdi->speed = cd->current_speed;
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}
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return 0;
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}
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int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
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struct cdrom_multisession *ms_info)
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{
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struct atapi_toc *toc;
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ide_drive_t *drive = cdi->handle;
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struct cdrom_info *info = drive->driver_data;
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struct request_sense sense;
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int ret;
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if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
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ret = ide_cd_read_toc(drive, &sense);
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if (ret)
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return ret;
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}
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toc = info->toc;
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ms_info->addr.lba = toc->last_session_lba;
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ms_info->xa_flag = toc->xa_flag;
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return 0;
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}
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int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
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struct cdrom_mcn *mcn_info)
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{
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ide_drive_t *drive = cdi->handle;
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int stat, mcnlen;
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char buf[24];
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unsigned char cmd[BLK_MAX_CDB];
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unsigned len = sizeof(buf);
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_READ_SUBCHANNEL;
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cmd[1] = 2; /* MSF addressing */
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cmd[2] = 0x40; /* request subQ data */
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cmd[3] = 2; /* format */
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cmd[8] = len;
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stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
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if (stat)
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return stat;
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mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
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memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
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mcn_info->medium_catalog_number[mcnlen] = '\0';
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return 0;
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}
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int ide_cdrom_reset(struct cdrom_device_info *cdi)
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{
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ide_drive_t *drive = cdi->handle;
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struct cdrom_info *cd = drive->driver_data;
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struct request_sense sense;
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struct request *rq;
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int ret;
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rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
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ide_req(rq)->type = ATA_PRIV_MISC;
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rq->rq_flags = RQF_QUIET;
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blk_execute_rq(drive->queue, cd->disk, rq, 0);
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ret = scsi_req(rq)->result ? -EIO : 0;
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blk_put_request(rq);
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/*
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* A reset will unlock the door. If it was previously locked,
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* lock it again.
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*/
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if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
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(void)ide_cd_lockdoor(drive, 1, &sense);
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return ret;
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}
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static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
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struct atapi_toc_entry **ent)
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{
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struct cdrom_info *info = drive->driver_data;
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struct atapi_toc *toc = info->toc;
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int ntracks;
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/*
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* don't serve cached data, if the toc isn't valid
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*/
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if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
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return -EINVAL;
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/* Check validity of requested track number. */
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ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
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if (toc->hdr.first_track == CDROM_LEADOUT)
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ntracks = 0;
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if (track == CDROM_LEADOUT)
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*ent = &toc->ent[ntracks];
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else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
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return -EINVAL;
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else
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*ent = &toc->ent[track - toc->hdr.first_track];
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return 0;
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}
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static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
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{
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struct cdrom_ti *ti = arg;
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struct atapi_toc_entry *first_toc, *last_toc;
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unsigned long lba_start, lba_end;
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int stat;
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struct request_sense sense;
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unsigned char cmd[BLK_MAX_CDB];
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stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
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if (stat)
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return stat;
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stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
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if (stat)
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return stat;
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if (ti->cdti_trk1 != CDROM_LEADOUT)
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++last_toc;
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lba_start = first_toc->addr.lba;
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lba_end = last_toc->addr.lba;
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if (lba_end <= lba_start)
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return -EINVAL;
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memset(cmd, 0, BLK_MAX_CDB);
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cmd[0] = GPCMD_PLAY_AUDIO_MSF;
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lba_to_msf(lba_start, &cmd[3], &cmd[4], &cmd[5]);
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lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
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return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
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}
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static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
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{
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struct cdrom_info *cd = drive->driver_data;
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struct cdrom_tochdr *tochdr = arg;
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struct atapi_toc *toc;
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int stat;
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/* Make sure our saved TOC is valid. */
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stat = ide_cd_read_toc(drive, NULL);
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if (stat)
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return stat;
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toc = cd->toc;
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tochdr->cdth_trk0 = toc->hdr.first_track;
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tochdr->cdth_trk1 = toc->hdr.last_track;
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return 0;
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}
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static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
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{
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struct cdrom_tocentry *tocentry = arg;
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struct atapi_toc_entry *toce;
|
|
int stat;
|
|
|
|
stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
|
|
if (stat)
|
|
return stat;
|
|
|
|
tocentry->cdte_ctrl = toce->control;
|
|
tocentry->cdte_adr = toce->adr;
|
|
if (tocentry->cdte_format == CDROM_MSF) {
|
|
lba_to_msf(toce->addr.lba,
|
|
&tocentry->cdte_addr.msf.minute,
|
|
&tocentry->cdte_addr.msf.second,
|
|
&tocentry->cdte_addr.msf.frame);
|
|
} else
|
|
tocentry->cdte_addr.lba = toce->addr.lba;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
ide_drive_t *drive = cdi->handle;
|
|
|
|
switch (cmd) {
|
|
/*
|
|
* emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
|
|
* atapi doesn't support it
|
|
*/
|
|
case CDROMPLAYTRKIND:
|
|
return ide_cd_fake_play_trkind(drive, arg);
|
|
case CDROMREADTOCHDR:
|
|
return ide_cd_read_tochdr(drive, arg);
|
|
case CDROMREADTOCENTRY:
|
|
return ide_cd_read_tocentry(drive, arg);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* the generic packet interface to cdrom.c */
|
|
int ide_cdrom_packet(struct cdrom_device_info *cdi,
|
|
struct packet_command *cgc)
|
|
{
|
|
ide_drive_t *drive = cdi->handle;
|
|
req_flags_t flags = 0;
|
|
unsigned len = cgc->buflen;
|
|
|
|
if (cgc->timeout <= 0)
|
|
cgc->timeout = ATAPI_WAIT_PC;
|
|
|
|
/* here we queue the commands from the uniform CD-ROM
|
|
layer. the packet must be complete, as we do not
|
|
touch it at all. */
|
|
|
|
if (cgc->sense)
|
|
memset(cgc->sense, 0, sizeof(struct request_sense));
|
|
|
|
if (cgc->quiet)
|
|
flags |= RQF_QUIET;
|
|
|
|
cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
|
|
cgc->data_direction == CGC_DATA_WRITE,
|
|
cgc->buffer, &len,
|
|
cgc->sense, cgc->timeout, flags);
|
|
if (!cgc->stat)
|
|
cgc->buflen -= len;
|
|
return cgc->stat;
|
|
}
|