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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>
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 1999 Al Smith
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*
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* Portions derived from work (c) 1995,1996 Christian Vogelgsang.
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* Portions derived from IRIX header files (c) 1988 Silicon Graphics
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*/
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#ifndef _EFS_EFS_H_
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#define _EFS_EFS_H_
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#ifdef pr_fmt
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#undef pr_fmt
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#endif
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/fs.h>
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#include <linux/uaccess.h>
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#define EFS_VERSION "1.0a"
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static const char cprt[] = "EFS: "EFS_VERSION" - (c) 1999 Al Smith <Al.Smith@aeschi.ch.eu.org>";
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/* 1 block is 512 bytes */
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#define EFS_BLOCKSIZE_BITS 9
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#define EFS_BLOCKSIZE (1 << EFS_BLOCKSIZE_BITS)
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typedef int32_t efs_block_t;
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typedef uint32_t efs_ino_t;
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#define EFS_DIRECTEXTENTS 12
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/*
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* layout of an extent, in memory and on disk. 8 bytes exactly.
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*/
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typedef union extent_u {
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unsigned char raw[8];
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struct extent_s {
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unsigned int ex_magic:8; /* magic # (zero) */
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unsigned int ex_bn:24; /* basic block */
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unsigned int ex_length:8; /* numblocks in this extent */
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unsigned int ex_offset:24; /* logical offset into file */
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} cooked;
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} efs_extent;
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typedef struct edevs {
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__be16 odev;
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__be32 ndev;
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} efs_devs;
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/*
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* extent based filesystem inode as it appears on disk. The efs inode
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* is exactly 128 bytes long.
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*/
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struct efs_dinode {
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__be16 di_mode; /* mode and type of file */
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__be16 di_nlink; /* number of links to file */
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__be16 di_uid; /* owner's user id */
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__be16 di_gid; /* owner's group id */
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__be32 di_size; /* number of bytes in file */
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__be32 di_atime; /* time last accessed */
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__be32 di_mtime; /* time last modified */
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__be32 di_ctime; /* time created */
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__be32 di_gen; /* generation number */
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__be16 di_numextents; /* # of extents */
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u_char di_version; /* version of inode */
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u_char di_spare; /* spare - used by AFS */
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union di_addr {
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efs_extent di_extents[EFS_DIRECTEXTENTS];
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efs_devs di_dev; /* device for IFCHR/IFBLK */
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} di_u;
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};
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/* efs inode storage in memory */
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struct efs_inode_info {
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int numextents;
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int lastextent;
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efs_extent extents[EFS_DIRECTEXTENTS];
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struct inode vfs_inode;
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};
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#include <linux/efs_fs_sb.h>
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#define EFS_DIRBSIZE_BITS EFS_BLOCKSIZE_BITS
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#define EFS_DIRBSIZE (1 << EFS_DIRBSIZE_BITS)
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struct efs_dentry {
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__be32 inode;
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unsigned char namelen;
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char name[3];
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};
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#define EFS_DENTSIZE (sizeof(struct efs_dentry) - 3 + 1)
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#define EFS_MAXNAMELEN ((1 << (sizeof(char) * 8)) - 1)
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#define EFS_DIRBLK_HEADERSIZE 4
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#define EFS_DIRBLK_MAGIC 0xbeef /* moo */
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struct efs_dir {
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__be16 magic;
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unsigned char firstused;
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unsigned char slots;
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unsigned char space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
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};
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#define EFS_MAXENTS \
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((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
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(EFS_DENTSIZE + sizeof(char)))
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#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
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#define EFS_REALOFF(offset) ((offset << 1))
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static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
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{
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return container_of(inode, struct efs_inode_info, vfs_inode);
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}
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static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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struct statfs;
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struct fid;
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extern const struct inode_operations efs_dir_inode_operations;
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extern const struct file_operations efs_dir_operations;
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extern const struct address_space_operations efs_symlink_aops;
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extern struct inode *efs_iget(struct super_block *, unsigned long);
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extern efs_block_t efs_map_block(struct inode *, efs_block_t);
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extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
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extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
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extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
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int fh_len, int fh_type);
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extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
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int fh_len, int fh_type);
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extern struct dentry *efs_get_parent(struct dentry *);
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extern int efs_bmap(struct inode *, int);
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#endif /* _EFS_EFS_H_ */
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