License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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>
2017-11-01 17:07:57 +03:00
/* SPDX-License-Identifier: GPL-2.0 */
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/*
* Copyright ( C ) 1995 - 1997 Olaf Kirch < okir @ monad . swb . de >
*/
# ifndef NFSD_EXPORT_H
# define NFSD_EXPORT_H
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# include <linux/sunrpc/cache.h>
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# include <uapi/linux/nfsd/export.h>
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# include <linux/nfs4.h>
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struct knfsd_fh ;
struct svc_fh ;
struct svc_rqst ;
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/*
* FS Locations
*/
# define MAX_FS_LOCATIONS 128
struct nfsd4_fs_location {
char * hosts ; /* colon separated list of hosts */
char * path ; /* slash separated list of path components */
} ;
struct nfsd4_fs_locations {
uint32_t locations_count ;
struct nfsd4_fs_location * locations ;
/* If we're not actually serving this data ourselves (only providing a
* list of replicas that do serve it ) then we set " migrated " : */
int migrated ;
} ;
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/*
* We keep an array of pseudoflavors with the export , in order from most
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* to least preferred . For the foreseeable future , we don ' t expect more
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* than the eight pseudoflavors null , unix , krb5 , krb5i , krb5p , skpm3 ,
* spkm3i , and spkm3p ( and using all 8 at once should be rare ) .
*/
# define MAX_SECINFO_LIST 8
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# define EX_UUID_LEN 16
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struct exp_flavor_info {
u32 pseudoflavor ;
u32 flags ;
} ;
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struct svc_export {
struct cache_head h ;
struct auth_domain * ex_client ;
int ex_flags ;
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struct path ex_path ;
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kuid_t ex_anon_uid ;
kgid_t ex_anon_gid ;
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int ex_fsid ;
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unsigned char * ex_uuid ; /* 16 byte fsid */
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struct nfsd4_fs_locations ex_fslocs ;
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uint32_t ex_nflavors ;
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struct exp_flavor_info ex_flavors [ MAX_SECINFO_LIST ] ;
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u32 ex_layout_types ;
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 15:11:59 +04:00
struct nfsd4_deviceid_map * ex_devid_map ;
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struct cache_detail * cd ;
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} ;
/* an "export key" (expkey) maps a filehandlefragement to an
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* svc_export for a given client . There can be several per export ,
* for the different fsid types .
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*/
struct svc_expkey {
struct cache_head h ;
struct auth_domain * ek_client ;
int ek_fsidtype ;
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u32 ek_fsid [ 6 ] ;
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struct path ek_path ;
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} ;
# define EX_ISSYNC(exp) (!((exp)->ex_flags & NFSEXP_ASYNC))
# define EX_NOHIDE(exp) ((exp)->ex_flags & NFSEXP_NOHIDE)
# define EX_WGATHER(exp) ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
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int nfsexp_flags ( struct svc_rqst * rqstp , struct svc_export * exp ) ;
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__be32 check_nfsd_access ( struct svc_export * exp , struct svc_rqst * rqstp ) ;
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/*
* Function declarations
*/
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int nfsd_export_init ( struct net * ) ;
void nfsd_export_shutdown ( struct net * ) ;
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void nfsd_export_flush ( struct net * ) ;
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struct svc_export * rqst_exp_get_by_name ( struct svc_rqst * ,
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struct path * ) ;
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struct svc_export * rqst_exp_parent ( struct svc_rqst * ,
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struct path * ) ;
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struct svc_export * rqst_find_fsidzero_export ( struct svc_rqst * ) ;
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int exp_rootfh ( struct net * , struct auth_domain * ,
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char * path , struct knfsd_fh * , int maxsize ) ;
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__be32 exp_pseudoroot ( struct svc_rqst * , struct svc_fh * ) ;
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__be32 nfserrno ( int errno ) ;
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static inline void exp_put ( struct svc_export * exp )
{
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cache_put ( & exp - > h , exp - > cd ) ;
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}
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static inline struct svc_export * exp_get ( struct svc_export * exp )
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{
cache_get ( & exp - > h ) ;
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return exp ;
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}
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struct svc_export * rqst_exp_find ( struct svc_rqst * , int , u32 * ) ;
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# endif /* NFSD_EXPORT_H */