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>
147 lines
3.2 KiB
C
147 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_KVM_STAT_H
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#define __PERF_KVM_STAT_H
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#include "../perf.h"
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#include "evsel.h"
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#include "evlist.h"
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#include "session.h"
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#include "tool.h"
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#include "stat.h"
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struct event_key {
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#define INVALID_KEY (~0ULL)
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u64 key;
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int info;
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struct exit_reasons_table *exit_reasons;
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};
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struct kvm_event_stats {
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u64 time;
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struct stats stats;
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};
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struct kvm_event {
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struct list_head hash_entry;
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struct rb_node rb;
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struct event_key key;
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struct kvm_event_stats total;
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#define DEFAULT_VCPU_NUM 8
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int max_vcpu;
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struct kvm_event_stats *vcpu;
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};
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typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
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struct kvm_event_key {
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const char *name;
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key_cmp_fun key;
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};
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struct perf_kvm_stat;
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struct child_event_ops {
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void (*get_key)(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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const char *name;
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};
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struct kvm_events_ops {
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bool (*is_begin_event)(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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bool (*is_end_event)(struct perf_evsel *evsel,
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struct perf_sample *sample, struct event_key *key);
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struct child_event_ops *child_ops;
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void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key,
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char *decode);
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const char *name;
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};
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struct exit_reasons_table {
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unsigned long exit_code;
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const char *reason;
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};
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#define EVENTS_BITS 12
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#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
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struct perf_kvm_stat {
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struct perf_tool tool;
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struct record_opts opts;
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struct perf_evlist *evlist;
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struct perf_session *session;
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const char *file_name;
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const char *report_event;
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const char *sort_key;
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int trace_vcpu;
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struct exit_reasons_table *exit_reasons;
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const char *exit_reasons_isa;
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struct kvm_events_ops *events_ops;
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key_cmp_fun compare;
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struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
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u64 total_time;
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u64 total_count;
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u64 lost_events;
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u64 duration;
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struct intlist *pid_list;
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struct rb_root result;
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int timerfd;
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unsigned int display_time;
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bool live;
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bool force;
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};
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struct kvm_reg_events_ops {
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const char *name;
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struct kvm_events_ops *ops;
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};
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void exit_event_get_key(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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bool exit_event_begin(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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bool exit_event_end(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key);
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void exit_event_decode_key(struct perf_kvm_stat *kvm,
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struct event_key *key,
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char *decode);
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bool kvm_exit_event(struct perf_evsel *evsel);
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bool kvm_entry_event(struct perf_evsel *evsel);
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int setup_kvm_events_tp(struct perf_kvm_stat *kvm);
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#define define_exit_reasons_table(name, symbols) \
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static struct exit_reasons_table name[] = { \
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symbols, { -1, NULL } \
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}
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/*
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* arch specific callbacks and data structures
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*/
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int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid);
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extern const char *kvm_events_tp[];
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extern struct kvm_reg_events_ops kvm_reg_events_ops[];
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extern const char * const kvm_skip_events[];
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extern const char *vcpu_id_str;
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extern const int decode_str_len;
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extern const char *kvm_exit_reason;
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extern const char *kvm_entry_trace;
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extern const char *kvm_exit_trace;
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#endif /* __PERF_KVM_STAT_H */
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