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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>
124 lines
4.6 KiB
C
124 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* quota.h for OCFS2
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*
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* On disk quota structures for local and global quota file, in-memory
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* structures.
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*
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*/
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#ifndef _OCFS2_QUOTA_H
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#define _OCFS2_QUOTA_H
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/quota.h>
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#include <linux/list.h>
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#include <linux/dqblk_qtree.h>
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#include "ocfs2.h"
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/* Number of quota types we support */
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#define OCFS2_MAXQUOTAS 2
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/*
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* In-memory structures
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*/
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struct ocfs2_dquot {
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struct dquot dq_dquot; /* Generic VFS dquot */
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loff_t dq_local_off; /* Offset in the local quota file */
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u64 dq_local_phys_blk; /* Physical block carrying quota structure */
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struct ocfs2_quota_chunk *dq_chunk; /* Chunk dquot is in */
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unsigned int dq_use_count; /* Number of nodes having reference to this entry in global quota file */
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s64 dq_origspace; /* Last globally synced space usage */
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s64 dq_originodes; /* Last globally synced inode usage */
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struct llist_node list; /* Member of list of dquots to drop */
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};
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/* Description of one chunk to recover in memory */
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struct ocfs2_recovery_chunk {
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struct list_head rc_list; /* List of chunks */
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int rc_chunk; /* Chunk number */
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unsigned long *rc_bitmap; /* Bitmap of entries to recover */
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};
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struct ocfs2_quota_recovery {
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struct list_head r_list[OCFS2_MAXQUOTAS]; /* List of chunks to recover */
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};
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/* In-memory structure with quota header information */
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struct ocfs2_mem_dqinfo {
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unsigned int dqi_type; /* Quota type this structure describes */
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unsigned int dqi_flags; /* Flags OLQF_* */
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unsigned int dqi_chunks; /* Number of chunks in local quota file */
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unsigned int dqi_blocks; /* Number of blocks allocated for local quota file */
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unsigned int dqi_syncms; /* How often should we sync with other nodes */
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struct list_head dqi_chunk; /* List of chunks */
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struct inode *dqi_gqinode; /* Global quota file inode */
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struct ocfs2_lock_res dqi_gqlock; /* Lock protecting quota information structure */
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struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
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int dqi_gqi_count; /* Number of holders of dqi_gqi_bh */
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u64 dqi_giblk; /* Number of block with global information header */
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struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
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struct buffer_head *dqi_libh; /* Buffer with local information header */
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struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
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struct delayed_work dqi_sync_work; /* Work for syncing dquots */
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struct ocfs2_quota_recovery *dqi_rec; /* Pointer to recovery
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* information, in case we
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* enable quotas on file
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* needing it */
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};
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static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
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{
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return container_of(dquot, struct ocfs2_dquot, dq_dquot);
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}
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struct ocfs2_quota_chunk {
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struct list_head qc_chunk; /* List of quotafile chunks */
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int qc_num; /* Number of quota chunk */
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struct buffer_head *qc_headerbh; /* Buffer head with chunk header */
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};
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extern struct kmem_cache *ocfs2_dquot_cachep;
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extern struct kmem_cache *ocfs2_qf_chunk_cachep;
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extern const struct qtree_fmt_operations ocfs2_global_ops;
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struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
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struct ocfs2_super *osb, int slot_num);
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int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
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struct ocfs2_quota_recovery *rec,
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int slot_num);
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void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
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ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
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size_t len, loff_t off);
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ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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const char *data, size_t len, loff_t off);
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int ocfs2_global_read_info(struct super_block *sb, int type);
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int ocfs2_global_write_info(struct super_block *sb, int type);
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int ocfs2_global_read_dquot(struct dquot *dquot);
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int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
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static inline int ocfs2_sync_dquot(struct dquot *dquot)
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{
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return __ocfs2_sync_dquot(dquot, 0);
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}
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static inline int ocfs2_global_release_dquot(struct dquot *dquot)
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{
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return __ocfs2_sync_dquot(dquot, 1);
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}
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int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
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void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
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int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
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int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
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struct buffer_head **bh);
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int ocfs2_create_local_dquot(struct dquot *dquot);
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int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
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int ocfs2_local_write_dquot(struct dquot *dquot);
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void ocfs2_drop_dquot_refs(struct work_struct *work);
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extern const struct dquot_operations ocfs2_quota_operations;
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extern struct quota_format_type ocfs2_quota_format;
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#endif /* _OCFS2_QUOTA_H */
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