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b24413180f
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>
146 lines
4.8 KiB
C
146 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef SCSI_TRANSPORT_SRP_H
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#define SCSI_TRANSPORT_SRP_H
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#include <linux/transport_class.h>
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#include <linux/types.h>
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#include <linux/mutex.h>
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#define SRP_RPORT_ROLE_INITIATOR 0
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#define SRP_RPORT_ROLE_TARGET 1
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struct srp_rport_identifiers {
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u8 port_id[16];
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u8 roles;
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};
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/**
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* enum srp_rport_state - SRP transport layer state
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* @SRP_RPORT_RUNNING: Transport layer operational.
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* @SRP_RPORT_BLOCKED: Transport layer not operational; fast I/O fail timer
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* is running and I/O has been blocked.
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* @SRP_RPORT_FAIL_FAST: Fast I/O fail timer has expired; fail I/O fast.
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* @SRP_RPORT_LOST: Port is being removed.
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*/
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enum srp_rport_state {
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SRP_RPORT_RUNNING,
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SRP_RPORT_BLOCKED,
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SRP_RPORT_FAIL_FAST,
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SRP_RPORT_LOST,
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};
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/**
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* struct srp_rport - SRP initiator or target port
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*
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* Fields that are relevant for SRP initiator and SRP target drivers:
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* @dev: Device associated with this rport.
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* @port_id: 16-byte port identifier.
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* @roles: Role of this port - initiator or target.
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*
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* Fields that are only relevant for SRP initiator drivers:
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* @lld_data: LLD private data.
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* @mutex: Protects against concurrent rport reconnect /
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* fast_io_fail / dev_loss_tmo activity.
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* @state: rport state.
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* @reconnect_delay: Reconnect delay in seconds.
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* @failed_reconnects: Number of failed reconnect attempts.
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* @reconnect_work: Work structure used for scheduling reconnect attempts.
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* @fast_io_fail_tmo: Fast I/O fail timeout in seconds.
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* @dev_loss_tmo: Device loss timeout in seconds.
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* @fast_io_fail_work: Work structure used for scheduling fast I/O fail work.
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* @dev_loss_work: Work structure used for scheduling device loss work.
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*/
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struct srp_rport {
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/* for initiator and target drivers */
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struct device dev;
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u8 port_id[16];
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u8 roles;
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/* for initiator drivers */
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void *lld_data;
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struct mutex mutex;
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enum srp_rport_state state;
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int reconnect_delay;
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int failed_reconnects;
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struct delayed_work reconnect_work;
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int fast_io_fail_tmo;
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int dev_loss_tmo;
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struct delayed_work fast_io_fail_work;
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struct delayed_work dev_loss_work;
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};
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/**
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* struct srp_function_template
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*
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* Fields that are only relevant for SRP initiator drivers:
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* @has_rport_state: Whether or not to create the state, fast_io_fail_tmo and
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* dev_loss_tmo sysfs attribute for an rport.
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* @reset_timer_if_blocked: Whether or srp_timed_out() should reset the command
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* timer if the device on which it has been queued is blocked.
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* @reconnect_delay: If not NULL, points to the default reconnect_delay value.
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* @fast_io_fail_tmo: If not NULL, points to the default fast_io_fail_tmo value.
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* @dev_loss_tmo: If not NULL, points to the default dev_loss_tmo value.
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* @reconnect: Callback function for reconnecting to the target. See also
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* srp_reconnect_rport().
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* @terminate_rport_io: Callback function for terminating all outstanding I/O
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* requests for an rport.
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* @rport_delete: Callback function that deletes an rport.
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*/
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struct srp_function_template {
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/* for initiator drivers */
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bool has_rport_state;
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bool reset_timer_if_blocked;
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int *reconnect_delay;
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int *fast_io_fail_tmo;
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int *dev_loss_tmo;
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int (*reconnect)(struct srp_rport *rport);
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void (*terminate_rport_io)(struct srp_rport *rport);
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void (*rport_delete)(struct srp_rport *rport);
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};
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extern struct scsi_transport_template *
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srp_attach_transport(struct srp_function_template *);
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extern void srp_release_transport(struct scsi_transport_template *);
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extern void srp_rport_get(struct srp_rport *rport);
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extern void srp_rport_put(struct srp_rport *rport);
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extern struct srp_rport *srp_rport_add(struct Scsi_Host *,
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struct srp_rport_identifiers *);
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extern void srp_rport_del(struct srp_rport *);
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extern int srp_tmo_valid(int reconnect_delay, int fast_io_fail_tmo,
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long dev_loss_tmo);
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int srp_parse_tmo(int *tmo, const char *buf);
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extern int srp_reconnect_rport(struct srp_rport *rport);
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extern void srp_start_tl_fail_timers(struct srp_rport *rport);
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extern void srp_remove_host(struct Scsi_Host *);
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extern void srp_stop_rport_timers(struct srp_rport *rport);
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enum blk_eh_timer_return srp_timed_out(struct scsi_cmnd *scmd);
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/**
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* srp_chkready() - evaluate the transport layer state before I/O
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* @rport: SRP target port pointer.
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*
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* Returns a SCSI result code that can be returned by the LLD queuecommand()
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* implementation. The role of this function is similar to that of
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* fc_remote_port_chkready().
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*/
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static inline int srp_chkready(struct srp_rport *rport)
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{
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switch (rport->state) {
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case SRP_RPORT_RUNNING:
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case SRP_RPORT_BLOCKED:
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default:
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return 0;
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case SRP_RPORT_FAIL_FAST:
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return DID_TRANSPORT_FAILFAST << 16;
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case SRP_RPORT_LOST:
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return DID_NO_CONNECT << 16;
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}
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}
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#endif
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