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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>
170 lines
5.2 KiB
C
170 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef FS_MINIX_H
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#define FS_MINIX_H
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/minix_fs.h>
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#define INODE_VERSION(inode) minix_sb(inode->i_sb)->s_version
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#define MINIX_V1 0x0001 /* original minix fs */
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#define MINIX_V2 0x0002 /* minix V2 fs */
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#define MINIX_V3 0x0003 /* minix V3 fs */
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/*
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* minix fs inode data in memory
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*/
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struct minix_inode_info {
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union {
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__u16 i1_data[16];
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__u32 i2_data[16];
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} u;
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struct inode vfs_inode;
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};
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/*
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* minix super-block data in memory
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*/
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struct minix_sb_info {
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unsigned long s_ninodes;
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unsigned long s_nzones;
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unsigned long s_imap_blocks;
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unsigned long s_zmap_blocks;
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unsigned long s_firstdatazone;
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unsigned long s_log_zone_size;
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unsigned long s_max_size;
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int s_dirsize;
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int s_namelen;
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struct buffer_head ** s_imap;
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struct buffer_head ** s_zmap;
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struct buffer_head * s_sbh;
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struct minix_super_block * s_ms;
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unsigned short s_mount_state;
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unsigned short s_version;
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};
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extern struct inode *minix_iget(struct super_block *, unsigned long);
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extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
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extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
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extern struct inode * minix_new_inode(const struct inode *, umode_t, int *);
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extern void minix_free_inode(struct inode * inode);
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extern unsigned long minix_count_free_inodes(struct super_block *sb);
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extern int minix_new_block(struct inode * inode);
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extern void minix_free_block(struct inode *inode, unsigned long block);
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extern unsigned long minix_count_free_blocks(struct super_block *sb);
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extern int minix_getattr(const struct path *, struct kstat *, u32, unsigned int);
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extern int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len);
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extern void V1_minix_truncate(struct inode *);
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extern void V2_minix_truncate(struct inode *);
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extern void minix_truncate(struct inode *);
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extern void minix_set_inode(struct inode *, dev_t);
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extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
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extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
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extern unsigned V1_minix_blocks(loff_t, struct super_block *);
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extern unsigned V2_minix_blocks(loff_t, struct super_block *);
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extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
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extern int minix_add_link(struct dentry*, struct inode*);
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extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
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extern int minix_make_empty(struct inode*, struct inode*);
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extern int minix_empty_dir(struct inode*);
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extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
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extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
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extern ino_t minix_inode_by_name(struct dentry*);
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extern const struct inode_operations minix_file_inode_operations;
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extern const struct inode_operations minix_dir_inode_operations;
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extern const struct file_operations minix_file_operations;
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extern const struct file_operations minix_dir_operations;
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static inline struct minix_sb_info *minix_sb(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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static inline struct minix_inode_info *minix_i(struct inode *inode)
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{
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return container_of(inode, struct minix_inode_info, vfs_inode);
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}
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static inline unsigned minix_blocks_needed(unsigned bits, unsigned blocksize)
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{
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return DIV_ROUND_UP(bits, blocksize * 8);
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}
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#if defined(CONFIG_MINIX_FS_NATIVE_ENDIAN) && \
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defined(CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED)
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#error Minix file system byte order broken
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#elif defined(CONFIG_MINIX_FS_NATIVE_ENDIAN)
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/*
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* big-endian 32 or 64 bit indexed bitmaps on big-endian system or
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* little-endian bitmaps on little-endian system
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*/
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#define minix_test_and_set_bit(nr, addr) \
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__test_and_set_bit((nr), (unsigned long *)(addr))
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#define minix_set_bit(nr, addr) \
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__set_bit((nr), (unsigned long *)(addr))
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#define minix_test_and_clear_bit(nr, addr) \
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__test_and_clear_bit((nr), (unsigned long *)(addr))
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#define minix_test_bit(nr, addr) \
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test_bit((nr), (unsigned long *)(addr))
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#define minix_find_first_zero_bit(addr, size) \
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find_first_zero_bit((unsigned long *)(addr), (size))
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#elif defined(CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED)
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/*
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* big-endian 16bit indexed bitmaps
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*/
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static inline int minix_find_first_zero_bit(const void *vaddr, unsigned size)
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{
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const unsigned short *p = vaddr, *addr = vaddr;
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unsigned short num;
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if (!size)
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return 0;
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size >>= 4;
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while (*p++ == 0xffff) {
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if (--size == 0)
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return (p - addr) << 4;
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}
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num = *--p;
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return ((p - addr) << 4) + ffz(num);
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}
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#define minix_test_and_set_bit(nr, addr) \
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__test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
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#define minix_set_bit(nr, addr) \
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__set_bit((nr) ^ 16, (unsigned long *)(addr))
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#define minix_test_and_clear_bit(nr, addr) \
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__test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))
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static inline int minix_test_bit(int nr, const void *vaddr)
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{
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const unsigned short *p = vaddr;
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return (p[nr >> 4] & (1U << (nr & 15))) != 0;
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}
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#else
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/*
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* little-endian bitmaps
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*/
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#define minix_test_and_set_bit __test_and_set_bit_le
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#define minix_set_bit __set_bit_le
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#define minix_test_and_clear_bit __test_and_clear_bit_le
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#define minix_test_bit test_bit_le
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#define minix_find_first_zero_bit find_first_zero_bit_le
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#endif
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#endif /* FS_MINIX_H */
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