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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>
215 lines
6.8 KiB
C
215 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* ncplib_kernel.h
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*
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* Copyright (C) 1995, 1996 by Volker Lendecke
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* Modified for big endian by J.F. Chadima and David S. Miller
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* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
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* Modified 1998, 1999 Wolfram Pienkoss for NLS
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* Modified 1999 Wolfram Pienkoss for directory caching
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*
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*/
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#ifndef _NCPLIB_H
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#define _NCPLIB_H
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/fcntl.h>
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#include <linux/pagemap.h>
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#include <linux/uaccess.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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#include <asm/string.h>
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#ifdef CONFIG_NCPFS_NLS
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#include <linux/nls.h>
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#else
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#include <linux/ctype.h>
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#endif /* CONFIG_NCPFS_NLS */
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#define NCP_MIN_SYMLINK_SIZE 8
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#define NCP_MAX_SYMLINK_SIZE 512
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#define NCP_BLOCK_SHIFT 9
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#define NCP_BLOCK_SIZE (1 << (NCP_BLOCK_SHIFT))
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int ncp_negotiate_buffersize(struct ncp_server *, int, int *);
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int ncp_negotiate_size_and_options(struct ncp_server *server, int size,
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int options, int *ret_size, int *ret_options);
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int ncp_get_volume_info_with_number(struct ncp_server* server, int n,
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struct ncp_volume_info *target);
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int ncp_get_directory_info(struct ncp_server* server, __u8 dirhandle,
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struct ncp_volume_info* target);
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int ncp_close_file(struct ncp_server *, const char *);
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static inline int ncp_read_bounce_size(__u32 size) {
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return sizeof(struct ncp_reply_header) + 2 + 2 + size + 8;
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};
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int ncp_read_bounce(struct ncp_server *, const char *, __u32, __u16,
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struct iov_iter *, int *, void *bounce, __u32 bouncelen);
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int ncp_read_kernel(struct ncp_server *, const char *, __u32, __u16,
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char *, int *);
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int ncp_write_kernel(struct ncp_server *, const char *, __u32, __u16,
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const char *, int *);
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static inline void ncp_inode_close(struct inode *inode) {
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atomic_dec(&NCP_FINFO(inode)->opened);
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}
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void ncp_extract_file_info(const void* src, struct nw_info_struct* target);
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int ncp_obtain_info(struct ncp_server *server, struct inode *, const char *,
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struct nw_info_struct *target);
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int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target);
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int ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns);
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int ncp_get_volume_root(struct ncp_server *server, const char *volname,
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__u32 *volume, __le32 *dirent, __le32 *dosdirent);
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int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *);
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int ncp_modify_file_or_subdir_dos_info(struct ncp_server *, struct inode *,
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__le32, const struct nw_modify_dos_info *info);
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int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *, struct inode *,
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const char* path, __le32, const struct nw_modify_dos_info *info);
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int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent,
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__u32 mode, __u32 rdev);
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int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*);
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int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, const char *);
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int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, const char *,
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int, __le32, __le16, struct ncp_entry_info *);
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int ncp_initialize_search(struct ncp_server *, struct inode *,
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struct nw_search_sequence *target);
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int ncp_search_for_fileset(struct ncp_server *server,
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struct nw_search_sequence *seq,
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int* more, int* cnt,
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char* buffer, size_t bufsize,
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char** rbuf, size_t* rsize);
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int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
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struct inode *, const char *, struct inode *, const char *);
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int
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ncp_LogPhysicalRecord(struct ncp_server *server,
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const char *file_id, __u8 locktype,
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__u32 offset, __u32 length, __u16 timeout);
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#ifdef CONFIG_NCPFS_IOCTL_LOCKING
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int
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ncp_ClearPhysicalRecord(struct ncp_server *server,
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const char *file_id,
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__u32 offset, __u32 length);
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#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
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int
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ncp_mount_subdir(struct ncp_server *, __u8, __u8, __le32,
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__u32* volume, __le32* dirent, __le32* dosdirent);
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int ncp_dirhandle_alloc(struct ncp_server *, __u8 vol, __le32 dirent, __u8 *dirhandle);
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int ncp_dirhandle_free(struct ncp_server *, __u8 dirhandle);
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int ncp_create_new(struct inode *dir, struct dentry *dentry,
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umode_t mode, dev_t rdev, __le32 attributes);
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static inline int ncp_is_nfs_extras(struct ncp_server* server, unsigned int volnum) {
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#ifdef CONFIG_NCPFS_NFS_NS
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return (server->m.flags & NCP_MOUNT_NFS_EXTRAS) &&
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(server->name_space[volnum] == NW_NS_NFS);
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#else
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return 0;
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#endif
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}
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#ifdef CONFIG_NCPFS_NLS
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int ncp__io2vol(struct ncp_server *, unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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int ncp__vol2io(struct ncp_server *, unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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#define NCP_ESC ':'
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#define NCP_IO_TABLE(sb) (NCP_SBP(sb)->nls_io)
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#define ncp_tolower(t, c) nls_tolower(t, c)
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#define ncp_toupper(t, c) nls_toupper(t, c)
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#define ncp_strnicmp(t, s1, s2, len) \
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nls_strnicmp(t, s1, s2, len)
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#define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(S,m,i,n,k,U)
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#define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(S,m,i,n,k,U)
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#else
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int ncp__io2vol(unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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int ncp__vol2io(unsigned char *, unsigned int *,
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const unsigned char *, unsigned int, int);
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#define NCP_IO_TABLE(sb) NULL
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#define ncp_tolower(t, c) tolower(c)
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#define ncp_toupper(t, c) toupper(c)
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#define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(m,i,n,k,U)
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#define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(m,i,n,k,U)
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static inline int ncp_strnicmp(const struct nls_table *t,
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const unsigned char *s1, const unsigned char *s2, int len)
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{
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while (len--) {
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if (tolower(*s1++) != tolower(*s2++))
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return 1;
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}
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return 0;
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}
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#endif /* CONFIG_NCPFS_NLS */
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#define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time)
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#define NCP_MAX_AGE(server) atomic_read(&(server)->dentry_ttl)
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#define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server))
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static inline void
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ncp_age_dentry(struct ncp_server* server, struct dentry* dentry)
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{
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dentry->d_time = jiffies - NCP_MAX_AGE(server);
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}
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static inline void
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ncp_new_dentry(struct dentry* dentry)
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{
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dentry->d_time = jiffies;
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}
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struct ncp_cache_head {
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time_t mtime;
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unsigned long time; /* cache age */
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unsigned long end; /* last valid fpos in cache */
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int eof;
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};
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#define NCP_DIRCACHE_SIZE ((int)(PAGE_SIZE/sizeof(struct dentry *)))
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union ncp_dir_cache {
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struct ncp_cache_head head;
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struct dentry *dentry[NCP_DIRCACHE_SIZE];
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};
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#define NCP_FIRSTCACHE_SIZE ((int)((NCP_DIRCACHE_SIZE * \
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sizeof(struct dentry *) - sizeof(struct ncp_cache_head)) / \
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sizeof(struct dentry *)))
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#define NCP_DIRCACHE_START (NCP_DIRCACHE_SIZE - NCP_FIRSTCACHE_SIZE)
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struct ncp_cache_control {
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struct ncp_cache_head head;
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struct page *page;
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union ncp_dir_cache *cache;
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unsigned long fpos, ofs;
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int filled, valid, idx;
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};
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#endif /* _NCPLIB_H */
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