mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![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>
257 lines
6.3 KiB
C
257 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* zfcp device driver
|
|
*
|
|
* Tracking of manually configured LUNs and helper functions to
|
|
* register the LUNs with the SCSI midlayer.
|
|
*
|
|
* Copyright IBM Corp. 2010
|
|
*/
|
|
|
|
#include "zfcp_def.h"
|
|
#include "zfcp_ext.h"
|
|
|
|
/**
|
|
* zfcp_unit_scsi_scan - Register LUN with SCSI midlayer
|
|
* @unit: The zfcp LUN/unit to register
|
|
*
|
|
* When the SCSI midlayer is not allowed to automatically scan and
|
|
* attach SCSI devices, zfcp has to register the single devices with
|
|
* the SCSI midlayer.
|
|
*/
|
|
void zfcp_unit_scsi_scan(struct zfcp_unit *unit)
|
|
{
|
|
struct fc_rport *rport = unit->port->rport;
|
|
u64 lun;
|
|
|
|
lun = scsilun_to_int((struct scsi_lun *) &unit->fcp_lun);
|
|
|
|
if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
|
|
scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, lun,
|
|
SCSI_SCAN_MANUAL);
|
|
}
|
|
|
|
static void zfcp_unit_scsi_scan_work(struct work_struct *work)
|
|
{
|
|
struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
|
|
scsi_work);
|
|
|
|
zfcp_unit_scsi_scan(unit);
|
|
put_device(&unit->dev);
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_queue_scsi_scan - Register configured units on port
|
|
* @port: The zfcp_port where to register units
|
|
*
|
|
* After opening a port, all units configured on this port have to be
|
|
* registered with the SCSI midlayer. This function should be called
|
|
* after calling fc_remote_port_add, so that the fc_rport is already
|
|
* ONLINE and the call to scsi_scan_target runs the same way as the
|
|
* call in the FC transport class.
|
|
*/
|
|
void zfcp_unit_queue_scsi_scan(struct zfcp_port *port)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
|
|
read_lock_irq(&port->unit_list_lock);
|
|
list_for_each_entry(unit, &port->unit_list, list) {
|
|
get_device(&unit->dev);
|
|
if (scsi_queue_work(port->adapter->scsi_host,
|
|
&unit->scsi_work) <= 0)
|
|
put_device(&unit->dev);
|
|
}
|
|
read_unlock_irq(&port->unit_list_lock);
|
|
}
|
|
|
|
static struct zfcp_unit *_zfcp_unit_find(struct zfcp_port *port, u64 fcp_lun)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
|
|
list_for_each_entry(unit, &port->unit_list, list)
|
|
if (unit->fcp_lun == fcp_lun) {
|
|
get_device(&unit->dev);
|
|
return unit;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_find - Find and return zfcp_unit with specified FCP LUN
|
|
* @port: zfcp_port where to look for the unit
|
|
* @fcp_lun: 64 Bit FCP LUN used to identify the zfcp_unit
|
|
*
|
|
* If zfcp_unit is found, a reference is acquired that has to be
|
|
* released later.
|
|
*
|
|
* Returns: Pointer to the zfcp_unit, or NULL if there is no zfcp_unit
|
|
* with the specified FCP LUN.
|
|
*/
|
|
struct zfcp_unit *zfcp_unit_find(struct zfcp_port *port, u64 fcp_lun)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
|
|
read_lock_irq(&port->unit_list_lock);
|
|
unit = _zfcp_unit_find(port, fcp_lun);
|
|
read_unlock_irq(&port->unit_list_lock);
|
|
return unit;
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_release - Drop reference to zfcp_port and free memory of zfcp_unit.
|
|
* @dev: pointer to device in zfcp_unit
|
|
*/
|
|
static void zfcp_unit_release(struct device *dev)
|
|
{
|
|
struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
|
|
|
|
atomic_dec(&unit->port->units);
|
|
kfree(unit);
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_enqueue - enqueue unit to unit list of a port.
|
|
* @port: pointer to port where unit is added
|
|
* @fcp_lun: FCP LUN of unit to be enqueued
|
|
* Returns: 0 success
|
|
*
|
|
* Sets up some unit internal structures and creates sysfs entry.
|
|
*/
|
|
int zfcp_unit_add(struct zfcp_port *port, u64 fcp_lun)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
int retval = 0;
|
|
|
|
mutex_lock(&zfcp_sysfs_port_units_mutex);
|
|
if (atomic_read(&port->units) == -1) {
|
|
/* port is already gone */
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
unit = zfcp_unit_find(port, fcp_lun);
|
|
if (unit) {
|
|
put_device(&unit->dev);
|
|
retval = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL);
|
|
if (!unit) {
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
unit->port = port;
|
|
unit->fcp_lun = fcp_lun;
|
|
unit->dev.parent = &port->dev;
|
|
unit->dev.release = zfcp_unit_release;
|
|
unit->dev.groups = zfcp_unit_attr_groups;
|
|
INIT_WORK(&unit->scsi_work, zfcp_unit_scsi_scan_work);
|
|
|
|
if (dev_set_name(&unit->dev, "0x%016llx",
|
|
(unsigned long long) fcp_lun)) {
|
|
kfree(unit);
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
if (device_register(&unit->dev)) {
|
|
put_device(&unit->dev);
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
atomic_inc(&port->units); /* under zfcp_sysfs_port_units_mutex ! */
|
|
|
|
write_lock_irq(&port->unit_list_lock);
|
|
list_add_tail(&unit->list, &port->unit_list);
|
|
write_unlock_irq(&port->unit_list_lock);
|
|
|
|
zfcp_unit_scsi_scan(unit);
|
|
|
|
out:
|
|
mutex_unlock(&zfcp_sysfs_port_units_mutex);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_sdev - Return SCSI device for zfcp_unit
|
|
* @unit: The zfcp_unit where to get the SCSI device for
|
|
*
|
|
* Returns: scsi_device pointer on success, NULL if there is no SCSI
|
|
* device for this zfcp_unit
|
|
*
|
|
* On success, the caller also holds a reference to the SCSI device
|
|
* that must be released with scsi_device_put.
|
|
*/
|
|
struct scsi_device *zfcp_unit_sdev(struct zfcp_unit *unit)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct zfcp_port *port;
|
|
u64 lun;
|
|
|
|
lun = scsilun_to_int((struct scsi_lun *) &unit->fcp_lun);
|
|
port = unit->port;
|
|
shost = port->adapter->scsi_host;
|
|
return scsi_device_lookup(shost, 0, port->starget_id, lun);
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_sdev_status - Return zfcp LUN status for SCSI device
|
|
* @unit: The unit to lookup the SCSI device for
|
|
*
|
|
* Returns the zfcp LUN status field of the SCSI device if the SCSI device
|
|
* for the zfcp_unit exists, 0 otherwise.
|
|
*/
|
|
unsigned int zfcp_unit_sdev_status(struct zfcp_unit *unit)
|
|
{
|
|
unsigned int status = 0;
|
|
struct scsi_device *sdev;
|
|
struct zfcp_scsi_dev *zfcp_sdev;
|
|
|
|
sdev = zfcp_unit_sdev(unit);
|
|
if (sdev) {
|
|
zfcp_sdev = sdev_to_zfcp(sdev);
|
|
status = atomic_read(&zfcp_sdev->status);
|
|
scsi_device_put(sdev);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_remove - Remove entry from list of configured units
|
|
* @port: The port where to remove the unit from the configuration
|
|
* @fcp_lun: The 64 bit LUN of the unit to remove
|
|
*
|
|
* Returns: -EINVAL if a unit with the specified LUN does not exist,
|
|
* 0 on success.
|
|
*/
|
|
int zfcp_unit_remove(struct zfcp_port *port, u64 fcp_lun)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
struct scsi_device *sdev;
|
|
|
|
write_lock_irq(&port->unit_list_lock);
|
|
unit = _zfcp_unit_find(port, fcp_lun);
|
|
if (unit)
|
|
list_del(&unit->list);
|
|
write_unlock_irq(&port->unit_list_lock);
|
|
|
|
if (!unit)
|
|
return -EINVAL;
|
|
|
|
sdev = zfcp_unit_sdev(unit);
|
|
if (sdev) {
|
|
scsi_remove_device(sdev);
|
|
scsi_device_put(sdev);
|
|
}
|
|
|
|
put_device(&unit->dev);
|
|
|
|
device_unregister(&unit->dev);
|
|
|
|
return 0;
|
|
}
|