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>
134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* User-space visible declarations for NFS client per-mount
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* point statistics
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*
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* Copyright (C) 2005, 2006 Chuck Lever <cel@netapp.com>
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*
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* NFS client per-mount statistics provide information about the
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* health of the NFS client and the health of each NFS mount point.
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* Generally these are not for detailed problem diagnosis, but
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* simply to indicate that there is a problem.
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*
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* These counters are not meant to be human-readable, but are meant
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* to be integrated into system monitoring tools such as "sar" and
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* "iostat". As such, the counters are sampled by the tools over
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* time, and are never zeroed after a file system is mounted.
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* Moving averages can be computed by the tools by taking the
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* difference between two instantaneous samples and dividing that
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* by the time between the samples.
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*/
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#ifndef _LINUX_NFS_IOSTAT
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#define _LINUX_NFS_IOSTAT
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#define NFS_IOSTAT_VERS "1.1"
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/*
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* NFS byte counters
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*
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* 1. SERVER - the number of payload bytes read from or written
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* to the server by the NFS client via an NFS READ or WRITE
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* request.
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*
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* 2. NORMAL - the number of bytes read or written by applications
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* via the read(2) and write(2) system call interfaces.
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*
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* 3. DIRECT - the number of bytes read or written from files
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* opened with the O_DIRECT flag.
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*
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* These counters give a view of the data throughput into and out
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* of the NFS client. Comparing the number of bytes requested by
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* an application with the number of bytes the client requests from
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* the server can provide an indication of client efficiency
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* (per-op, cache hits, etc).
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*
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* These counters can also help characterize which access methods
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* are in use. DIRECT by itself shows whether there is any O_DIRECT
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* traffic. NORMAL + DIRECT shows how much data is going through
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* the system call interface. A large amount of SERVER traffic
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* without much NORMAL or DIRECT traffic shows that applications
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* are using mapped files.
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*
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* NFS page counters
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*
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* These count the number of pages read or written via nfs_readpage(),
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* nfs_readpages(), or their write equivalents.
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*
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* NB: When adding new byte counters, please include the measured
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* units in the name of each byte counter to help users of this
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* interface determine what exactly is being counted.
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*/
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enum nfs_stat_bytecounters {
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NFSIOS_NORMALREADBYTES = 0,
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NFSIOS_NORMALWRITTENBYTES,
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NFSIOS_DIRECTREADBYTES,
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NFSIOS_DIRECTWRITTENBYTES,
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NFSIOS_SERVERREADBYTES,
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NFSIOS_SERVERWRITTENBYTES,
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NFSIOS_READPAGES,
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NFSIOS_WRITEPAGES,
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__NFSIOS_BYTESMAX,
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};
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/*
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* NFS event counters
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*
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* These counters provide a low-overhead way of monitoring client
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* activity without enabling NFS trace debugging. The counters
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* show the rate at which VFS requests are made, and how often the
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* client invalidates its data and attribute caches. This allows
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* system administrators to monitor such things as how close-to-open
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* is working, and answer questions such as "why are there so many
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* GETATTR requests on the wire?"
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*
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* They also count anamolous events such as short reads and writes,
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* silly renames due to close-after-delete, and operations that
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* change the size of a file (such operations can often be the
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* source of data corruption if applications aren't using file
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* locking properly).
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*/
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enum nfs_stat_eventcounters {
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NFSIOS_INODEREVALIDATE = 0,
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NFSIOS_DENTRYREVALIDATE,
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NFSIOS_DATAINVALIDATE,
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NFSIOS_ATTRINVALIDATE,
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NFSIOS_VFSOPEN,
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NFSIOS_VFSLOOKUP,
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NFSIOS_VFSACCESS,
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NFSIOS_VFSUPDATEPAGE,
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NFSIOS_VFSREADPAGE,
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NFSIOS_VFSREADPAGES,
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NFSIOS_VFSWRITEPAGE,
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NFSIOS_VFSWRITEPAGES,
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NFSIOS_VFSGETDENTS,
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NFSIOS_VFSSETATTR,
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NFSIOS_VFSFLUSH,
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NFSIOS_VFSFSYNC,
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NFSIOS_VFSLOCK,
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NFSIOS_VFSRELEASE,
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NFSIOS_CONGESTIONWAIT,
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NFSIOS_SETATTRTRUNC,
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NFSIOS_EXTENDWRITE,
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NFSIOS_SILLYRENAME,
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NFSIOS_SHORTREAD,
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NFSIOS_SHORTWRITE,
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NFSIOS_DELAY,
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NFSIOS_PNFS_READ,
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NFSIOS_PNFS_WRITE,
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__NFSIOS_COUNTSMAX,
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};
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/*
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* NFS local caching servicing counters
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*/
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enum nfs_stat_fscachecounters {
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NFSIOS_FSCACHE_PAGES_READ_OK,
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NFSIOS_FSCACHE_PAGES_READ_FAIL,
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NFSIOS_FSCACHE_PAGES_WRITTEN_OK,
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NFSIOS_FSCACHE_PAGES_WRITTEN_FAIL,
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NFSIOS_FSCACHE_PAGES_UNCACHED,
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__NFSIOS_FSCACHEMAX,
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};
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#endif /* _LINUX_NFS_IOSTAT */
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