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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>
199 lines
5.4 KiB
C
199 lines
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_DN_DEV_H
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#define _NET_DN_DEV_H
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struct dn_dev;
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struct dn_ifaddr {
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struct dn_ifaddr __rcu *ifa_next;
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struct dn_dev *ifa_dev;
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__le16 ifa_local;
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__le16 ifa_address;
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__u32 ifa_flags;
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__u8 ifa_scope;
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char ifa_label[IFNAMSIZ];
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struct rcu_head rcu;
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};
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#define DN_DEV_S_RU 0 /* Run - working normally */
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#define DN_DEV_S_CR 1 /* Circuit Rejected */
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#define DN_DEV_S_DS 2 /* Data Link Start */
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#define DN_DEV_S_RI 3 /* Routing Layer Initialize */
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#define DN_DEV_S_RV 4 /* Routing Layer Verify */
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#define DN_DEV_S_RC 5 /* Routing Layer Complete */
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#define DN_DEV_S_OF 6 /* Off */
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#define DN_DEV_S_HA 7 /* Halt */
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/*
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* The dn_dev_parms structure contains the set of parameters
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* for each device (hence inclusion in the dn_dev structure)
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* and an array is used to store the default types of supported
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* device (in dn_dev.c).
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*
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* The type field matches the ARPHRD_ constants and is used in
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* searching the list for supported devices when new devices
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* come up.
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*
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* The mode field is used to find out if a device is broadcast,
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* multipoint, or pointopoint. Please note that DECnet thinks
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* different ways about devices to the rest of the kernel
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* so the normal IFF_xxx flags are invalid here. For devices
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* which can be any combination of the previously mentioned
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* attributes, you can set this on a per device basis by
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* installing an up() routine.
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*
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* The device state field, defines the initial state in which the
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* device will come up. In the dn_dev structure, it is the actual
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* state.
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*
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* Things have changed here. I've killed timer1 since it's a user space
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* issue for a user space routing deamon to sort out. The kernel does
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* not need to be bothered with it.
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*
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* Timers:
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* t2 - Rate limit timer, min time between routing and hello messages
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* t3 - Hello timer, send hello messages when it expires
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*
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* Callbacks:
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* up() - Called to initialize device, return value can veto use of
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* device with DECnet.
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* down() - Called to turn device off when it goes down
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* timer3() - Called once for each ifaddr when timer 3 goes off
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*
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* sysctl - Hook for sysctl things
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*
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*/
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struct dn_dev_parms {
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int type; /* ARPHRD_xxx */
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int mode; /* Broadcast, Unicast, Mulitpoint */
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#define DN_DEV_BCAST 1
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#define DN_DEV_UCAST 2
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#define DN_DEV_MPOINT 4
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int state; /* Initial state */
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int forwarding; /* 0=EndNode, 1=L1Router, 2=L2Router */
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unsigned long t2; /* Default value of t2 */
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unsigned long t3; /* Default value of t3 */
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int priority; /* Priority to be a router */
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char *name; /* Name for sysctl */
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int (*up)(struct net_device *);
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void (*down)(struct net_device *);
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void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
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void *sysctl;
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};
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struct dn_dev {
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struct dn_ifaddr __rcu *ifa_list;
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struct net_device *dev;
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struct dn_dev_parms parms;
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char use_long;
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struct timer_list timer;
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unsigned long t3;
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struct neigh_parms *neigh_parms;
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__u8 addr[ETH_ALEN];
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struct neighbour *router; /* Default router on circuit */
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struct neighbour *peer; /* Peer on pointopoint links */
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unsigned long uptime; /* Time device went up in jiffies */
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};
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struct dn_short_packet {
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__u8 msgflg;
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__le16 dstnode;
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__le16 srcnode;
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__u8 forward;
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} __packed;
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struct dn_long_packet {
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__u8 msgflg;
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__u8 d_area;
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__u8 d_subarea;
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__u8 d_id[6];
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__u8 s_area;
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__u8 s_subarea;
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__u8 s_id[6];
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__u8 nl2;
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__u8 visit_ct;
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__u8 s_class;
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__u8 pt;
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} __packed;
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/*------------------------- DRP - Routing messages ---------------------*/
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struct endnode_hello_message {
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__u8 msgflg;
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__u8 tiver[3];
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__u8 id[6];
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__u8 iinfo;
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__le16 blksize;
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__u8 area;
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__u8 seed[8];
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__u8 neighbor[6];
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__le16 timer;
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__u8 mpd;
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__u8 datalen;
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__u8 data[2];
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} __packed;
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struct rtnode_hello_message {
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__u8 msgflg;
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__u8 tiver[3];
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__u8 id[6];
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__u8 iinfo;
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__le16 blksize;
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__u8 priority;
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__u8 area;
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__le16 timer;
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__u8 mpd;
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} __packed;
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void dn_dev_init(void);
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void dn_dev_cleanup(void);
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int dn_dev_ioctl(unsigned int cmd, void __user *arg);
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void dn_dev_devices_off(void);
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void dn_dev_devices_on(void);
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void dn_dev_init_pkt(struct sk_buff *skb);
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void dn_dev_veri_pkt(struct sk_buff *skb);
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void dn_dev_hello(struct sk_buff *skb);
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void dn_dev_up(struct net_device *);
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void dn_dev_down(struct net_device *);
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int dn_dev_set_default(struct net_device *dev, int force);
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struct net_device *dn_dev_get_default(void);
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int dn_dev_bind_default(__le16 *addr);
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int register_dnaddr_notifier(struct notifier_block *nb);
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int unregister_dnaddr_notifier(struct notifier_block *nb);
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static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
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{
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struct dn_dev *dn_db;
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struct dn_ifaddr *ifa;
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int res = 0;
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rcu_read_lock();
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dn_db = rcu_dereference(dev->dn_ptr);
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if (dn_db == NULL) {
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printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
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goto out;
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}
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for (ifa = rcu_dereference(dn_db->ifa_list);
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ifa != NULL;
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ifa = rcu_dereference(ifa->ifa_next))
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if ((addr ^ ifa->ifa_local) == 0) {
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res = 1;
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break;
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}
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out:
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rcu_read_unlock();
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return res;
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}
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#endif /* _NET_DN_DEV_H */
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