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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>
161 lines
4.1 KiB
C
161 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NET_FIB_RULES_H
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#define __NET_FIB_RULES_H
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/netdevice.h>
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#include <linux/fib_rules.h>
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#include <linux/refcount.h>
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#include <net/flow.h>
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#include <net/rtnetlink.h>
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#include <net/fib_notifier.h>
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struct fib_kuid_range {
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kuid_t start;
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kuid_t end;
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};
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struct fib_rule {
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struct list_head list;
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int iifindex;
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int oifindex;
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u32 mark;
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u32 mark_mask;
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u32 flags;
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u32 table;
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u8 action;
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u8 l3mdev;
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/* 2 bytes hole, try to use */
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u32 target;
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__be64 tun_id;
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struct fib_rule __rcu *ctarget;
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struct net *fr_net;
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refcount_t refcnt;
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u32 pref;
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int suppress_ifgroup;
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int suppress_prefixlen;
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char iifname[IFNAMSIZ];
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char oifname[IFNAMSIZ];
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struct fib_kuid_range uid_range;
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struct rcu_head rcu;
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};
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struct fib_lookup_arg {
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void *lookup_ptr;
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void *result;
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struct fib_rule *rule;
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u32 table;
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int flags;
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#define FIB_LOOKUP_NOREF 1
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#define FIB_LOOKUP_IGNORE_LINKSTATE 2
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};
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struct fib_rules_ops {
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int family;
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struct list_head list;
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int rule_size;
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int addr_size;
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int unresolved_rules;
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int nr_goto_rules;
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unsigned int fib_rules_seq;
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int (*action)(struct fib_rule *,
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struct flowi *, int,
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struct fib_lookup_arg *);
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bool (*suppress)(struct fib_rule *,
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struct fib_lookup_arg *);
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int (*match)(struct fib_rule *,
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struct flowi *, int);
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int (*configure)(struct fib_rule *,
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struct sk_buff *,
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struct fib_rule_hdr *,
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struct nlattr **);
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int (*delete)(struct fib_rule *);
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int (*compare)(struct fib_rule *,
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struct fib_rule_hdr *,
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struct nlattr **);
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int (*fill)(struct fib_rule *, struct sk_buff *,
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struct fib_rule_hdr *);
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size_t (*nlmsg_payload)(struct fib_rule *);
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/* Called after modifications to the rules set, must flush
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* the route cache if one exists. */
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void (*flush_cache)(struct fib_rules_ops *ops);
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int nlgroup;
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const struct nla_policy *policy;
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struct list_head rules_list;
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struct module *owner;
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struct net *fro_net;
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struct rcu_head rcu;
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};
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struct fib_rule_notifier_info {
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struct fib_notifier_info info; /* must be first */
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struct fib_rule *rule;
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};
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#define FRA_GENERIC_POLICY \
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[FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
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[FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
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[FRA_PRIORITY] = { .type = NLA_U32 }, \
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[FRA_FWMARK] = { .type = NLA_U32 }, \
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[FRA_FWMASK] = { .type = NLA_U32 }, \
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[FRA_TABLE] = { .type = NLA_U32 }, \
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[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
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[FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
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[FRA_GOTO] = { .type = NLA_U32 }, \
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[FRA_L3MDEV] = { .type = NLA_U8 }, \
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[FRA_UID_RANGE] = { .len = sizeof(struct fib_rule_uid_range) }
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static inline void fib_rule_get(struct fib_rule *rule)
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{
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refcount_inc(&rule->refcnt);
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}
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static inline void fib_rule_put(struct fib_rule *rule)
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{
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if (refcount_dec_and_test(&rule->refcnt))
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kfree_rcu(rule, rcu);
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}
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#ifdef CONFIG_NET_L3_MASTER_DEV
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static inline u32 fib_rule_get_table(struct fib_rule *rule,
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struct fib_lookup_arg *arg)
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{
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return rule->l3mdev ? arg->table : rule->table;
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}
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#else
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static inline u32 fib_rule_get_table(struct fib_rule *rule,
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struct fib_lookup_arg *arg)
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{
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return rule->table;
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}
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#endif
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static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
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{
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if (nla[FRA_TABLE])
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return nla_get_u32(nla[FRA_TABLE]);
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return frh->table;
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}
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struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
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struct net *);
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void fib_rules_unregister(struct fib_rules_ops *);
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int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
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struct fib_lookup_arg *);
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int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,
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u32 flags);
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bool fib_rule_matchall(const struct fib_rule *rule);
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int fib_rules_dump(struct net *net, struct notifier_block *nb, int family);
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unsigned int fib_rules_seq_read(struct net *net, int family);
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int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
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struct netlink_ext_ack *extack);
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int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
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struct netlink_ext_ack *extack);
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#endif
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