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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>
78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* Definitions for IB environment
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*
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* Copyright IBM Corp. 2016
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*
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* Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
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*/
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#ifndef _SMC_IB_H
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#define _SMC_IB_H
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#include <linux/interrupt.h>
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#include <linux/if_ether.h>
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#include <rdma/ib_verbs.h>
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#define SMC_MAX_PORTS 2 /* Max # of ports */
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#define SMC_GID_SIZE sizeof(union ib_gid)
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#define SMC_IB_MAX_SEND_SGE 2
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struct smc_ib_devices { /* list of smc ib devices definition */
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struct list_head list;
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spinlock_t lock; /* protects list of smc ib devices */
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};
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extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */
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struct smc_ib_device { /* ib-device infos for smc */
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struct list_head list;
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struct ib_device *ibdev;
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struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */
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struct ib_event_handler event_handler; /* global ib_event handler */
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struct ib_cq *roce_cq_send; /* send completion queue */
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struct ib_cq *roce_cq_recv; /* recv completion queue */
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struct tasklet_struct send_tasklet; /* called by send cq handler */
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struct tasklet_struct recv_tasklet; /* called by recv cq handler */
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char mac[SMC_MAX_PORTS][ETH_ALEN];
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/* mac address per port*/
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union ib_gid gid[SMC_MAX_PORTS]; /* gid per port */
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u8 initialized : 1; /* ib dev CQ, evthdl done */
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struct work_struct port_event_work;
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unsigned long port_event_mask;
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};
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struct smc_buf_desc;
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struct smc_link;
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int smc_ib_register_client(void) __init;
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void smc_ib_unregister_client(void);
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bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
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int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport);
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int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev,
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev,
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
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int smc_ib_create_protection_domain(struct smc_link *lnk);
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void smc_ib_destroy_queue_pair(struct smc_link *lnk);
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int smc_ib_create_queue_pair(struct smc_link *lnk);
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int smc_ib_ready_link(struct smc_link *lnk);
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int smc_ib_modify_qp_rts(struct smc_link *lnk);
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int smc_ib_modify_qp_reset(struct smc_link *lnk);
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long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
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int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
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struct smc_buf_desc *buf_slot);
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void smc_ib_put_memory_region(struct ib_mr *mr);
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void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev,
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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#endif
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