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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>
437 lines
13 KiB
C
437 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* XDR standard data types and function declarations
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*
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* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
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*
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* Based on:
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* RFC 4506 "XDR: External Data Representation Standard", May 2006
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*/
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#ifndef _SUNRPC_XDR_H_
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#define _SUNRPC_XDR_H_
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#ifdef __KERNEL__
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#include <linux/uio.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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#include <linux/scatterlist.h>
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struct rpc_rqst;
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/*
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* Buffer adjustment
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*/
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#define XDR_QUADLEN(l) (((l) + 3) >> 2)
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/*
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* Generic opaque `network object.' At the kernel level, this type
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* is used only by lockd.
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*/
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#define XDR_MAX_NETOBJ 1024
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struct xdr_netobj {
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unsigned int len;
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u8 * data;
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};
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/*
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* Basic structure for transmission/reception of a client XDR message.
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* Features a header (for a linear buffer containing RPC headers
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* and the data payload for short messages), and then an array of
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* pages.
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* The tail iovec allows you to append data after the page array. Its
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* main interest is for appending padding to the pages in order to
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* satisfy the int_32-alignment requirements in RFC1832.
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*
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* For the future, we might want to string several of these together
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* in a list if anybody wants to make use of NFSv4 COMPOUND
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* operations and/or has a need for scatter/gather involving pages.
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*/
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struct xdr_buf {
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struct kvec head[1], /* RPC header + non-page data */
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tail[1]; /* Appended after page data */
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struct page ** pages; /* Array of pages */
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unsigned int page_base, /* Start of page data */
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page_len, /* Length of page data */
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flags; /* Flags for data disposition */
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#define XDRBUF_READ 0x01 /* target of file read */
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#define XDRBUF_WRITE 0x02 /* source of file write */
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unsigned int buflen, /* Total length of storage buffer */
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len; /* Length of XDR encoded message */
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};
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static inline void
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xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
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{
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buf->head[0].iov_base = start;
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buf->head[0].iov_len = len;
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buf->tail[0].iov_len = 0;
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buf->page_len = 0;
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buf->flags = 0;
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buf->len = 0;
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buf->buflen = len;
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}
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/*
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* pre-xdr'ed macros.
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*/
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#define xdr_zero cpu_to_be32(0)
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#define xdr_one cpu_to_be32(1)
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#define xdr_two cpu_to_be32(2)
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#define rpc_success cpu_to_be32(RPC_SUCCESS)
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#define rpc_prog_unavail cpu_to_be32(RPC_PROG_UNAVAIL)
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#define rpc_prog_mismatch cpu_to_be32(RPC_PROG_MISMATCH)
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#define rpc_proc_unavail cpu_to_be32(RPC_PROC_UNAVAIL)
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#define rpc_garbage_args cpu_to_be32(RPC_GARBAGE_ARGS)
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#define rpc_system_err cpu_to_be32(RPC_SYSTEM_ERR)
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#define rpc_drop_reply cpu_to_be32(RPC_DROP_REPLY)
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#define rpc_auth_ok cpu_to_be32(RPC_AUTH_OK)
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#define rpc_autherr_badcred cpu_to_be32(RPC_AUTH_BADCRED)
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#define rpc_autherr_rejectedcred cpu_to_be32(RPC_AUTH_REJECTEDCRED)
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#define rpc_autherr_badverf cpu_to_be32(RPC_AUTH_BADVERF)
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#define rpc_autherr_rejectedverf cpu_to_be32(RPC_AUTH_REJECTEDVERF)
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#define rpc_autherr_tooweak cpu_to_be32(RPC_AUTH_TOOWEAK)
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#define rpcsec_gsserr_credproblem cpu_to_be32(RPCSEC_GSS_CREDPROBLEM)
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#define rpcsec_gsserr_ctxproblem cpu_to_be32(RPCSEC_GSS_CTXPROBLEM)
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#define rpc_autherr_oldseqnum cpu_to_be32(101)
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/*
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* Miscellaneous XDR helper functions
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*/
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__be32 *xdr_encode_opaque_fixed(__be32 *p, const void *ptr, unsigned int len);
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__be32 *xdr_encode_opaque(__be32 *p, const void *ptr, unsigned int len);
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__be32 *xdr_encode_string(__be32 *p, const char *s);
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__be32 *xdr_decode_string_inplace(__be32 *p, char **sp, unsigned int *lenp,
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unsigned int maxlen);
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__be32 *xdr_encode_netobj(__be32 *p, const struct xdr_netobj *);
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__be32 *xdr_decode_netobj(__be32 *p, struct xdr_netobj *);
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void xdr_inline_pages(struct xdr_buf *, unsigned int,
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struct page **, unsigned int, unsigned int);
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void xdr_terminate_string(struct xdr_buf *, const u32);
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static inline __be32 *xdr_encode_array(__be32 *p, const void *s, unsigned int len)
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{
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return xdr_encode_opaque(p, s, len);
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}
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/*
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* Decode 64bit quantities (NFSv3 support)
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*/
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static inline __be32 *
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xdr_encode_hyper(__be32 *p, __u64 val)
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{
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put_unaligned_be64(val, p);
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return p + 2;
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}
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static inline __be32 *
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xdr_decode_hyper(__be32 *p, __u64 *valp)
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{
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*valp = get_unaligned_be64(p);
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return p + 2;
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}
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static inline __be32 *
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xdr_decode_opaque_fixed(__be32 *p, void *ptr, unsigned int len)
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{
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memcpy(ptr, p, len);
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return p + XDR_QUADLEN(len);
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}
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/*
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* Adjust kvec to reflect end of xdr'ed data (RPC client XDR)
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*/
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static inline int
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xdr_adjust_iovec(struct kvec *iov, __be32 *p)
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{
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return iov->iov_len = ((u8 *) p - (u8 *) iov->iov_base);
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}
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/*
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* XDR buffer helper functions
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*/
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extern void xdr_shift_buf(struct xdr_buf *, size_t);
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extern void xdr_buf_from_iov(struct kvec *, struct xdr_buf *);
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extern int xdr_buf_subsegment(struct xdr_buf *, struct xdr_buf *, unsigned int, unsigned int);
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extern void xdr_buf_trim(struct xdr_buf *, unsigned int);
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extern int xdr_buf_read_netobj(struct xdr_buf *, struct xdr_netobj *, unsigned int);
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extern int read_bytes_from_xdr_buf(struct xdr_buf *, unsigned int, void *, unsigned int);
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extern int write_bytes_to_xdr_buf(struct xdr_buf *, unsigned int, void *, unsigned int);
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/*
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* Helper structure for copying from an sk_buff.
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*/
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struct xdr_skb_reader {
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struct sk_buff *skb;
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unsigned int offset;
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size_t count;
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__wsum csum;
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};
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typedef size_t (*xdr_skb_read_actor)(struct xdr_skb_reader *desc, void *to, size_t len);
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size_t xdr_skb_read_bits(struct xdr_skb_reader *desc, void *to, size_t len);
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extern int csum_partial_copy_to_xdr(struct xdr_buf *, struct sk_buff *);
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extern ssize_t xdr_partial_copy_from_skb(struct xdr_buf *, unsigned int,
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struct xdr_skb_reader *, xdr_skb_read_actor);
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extern int xdr_encode_word(struct xdr_buf *, unsigned int, u32);
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extern int xdr_decode_word(struct xdr_buf *, unsigned int, u32 *);
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struct xdr_array2_desc;
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typedef int (*xdr_xcode_elem_t)(struct xdr_array2_desc *desc, void *elem);
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struct xdr_array2_desc {
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unsigned int elem_size;
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unsigned int array_len;
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unsigned int array_maxlen;
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xdr_xcode_elem_t xcode;
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};
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extern int xdr_decode_array2(struct xdr_buf *buf, unsigned int base,
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struct xdr_array2_desc *desc);
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extern int xdr_encode_array2(struct xdr_buf *buf, unsigned int base,
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struct xdr_array2_desc *desc);
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extern void _copy_from_pages(char *p, struct page **pages, size_t pgbase,
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size_t len);
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/*
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* Provide some simple tools for XDR buffer overflow-checking etc.
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*/
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struct xdr_stream {
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__be32 *p; /* start of available buffer */
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struct xdr_buf *buf; /* XDR buffer to read/write */
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__be32 *end; /* end of available buffer space */
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struct kvec *iov; /* pointer to the current kvec */
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struct kvec scratch; /* Scratch buffer */
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struct page **page_ptr; /* pointer to the current page */
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unsigned int nwords; /* Remaining decode buffer length */
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};
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/*
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* These are the xdr_stream style generic XDR encode and decode functions.
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*/
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typedef void (*kxdreproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
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const void *obj);
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typedef int (*kxdrdproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
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void *obj);
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extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p);
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extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes);
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extern void xdr_commit_encode(struct xdr_stream *xdr);
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extern void xdr_truncate_encode(struct xdr_stream *xdr, size_t len);
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extern int xdr_restrict_buflen(struct xdr_stream *xdr, int newbuflen);
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extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
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unsigned int base, unsigned int len);
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extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr);
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extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p);
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extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
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struct page **pages, unsigned int len);
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extern void xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen);
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extern __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes);
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extern unsigned int xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
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extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
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extern int xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, int (*actor)(struct scatterlist *, void *), void *data);
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/**
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* xdr_stream_remaining - Return the number of bytes remaining in the stream
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* @xdr: pointer to struct xdr_stream
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*
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* Return value:
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* Number of bytes remaining in @xdr before xdr->end
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*/
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static inline size_t
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xdr_stream_remaining(const struct xdr_stream *xdr)
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{
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return xdr->nwords << 2;
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}
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ssize_t xdr_stream_decode_string_dup(struct xdr_stream *xdr, char **str,
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size_t maxlen, gfp_t gfp_flags);
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/**
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* xdr_align_size - Calculate padded size of an object
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* @n: Size of an object being XDR encoded (in bytes)
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*
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* Return value:
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* Size (in bytes) of the object including xdr padding
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*/
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static inline size_t
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xdr_align_size(size_t n)
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{
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const size_t mask = sizeof(__u32) - 1;
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return (n + mask) & ~mask;
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}
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/**
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* xdr_stream_encode_u32 - Encode a 32-bit integer
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* @xdr: pointer to xdr_stream
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* @n: integer to encode
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*
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* Return values:
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* On success, returns length in bytes of XDR buffer consumed
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* %-EMSGSIZE on XDR buffer overflow
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*/
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static inline ssize_t
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xdr_stream_encode_u32(struct xdr_stream *xdr, __u32 n)
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{
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const size_t len = sizeof(n);
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__be32 *p = xdr_reserve_space(xdr, len);
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if (unlikely(!p))
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return -EMSGSIZE;
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*p = cpu_to_be32(n);
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return len;
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}
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/**
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* xdr_stream_encode_u64 - Encode a 64-bit integer
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* @xdr: pointer to xdr_stream
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* @n: 64-bit integer to encode
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*
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* Return values:
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* On success, returns length in bytes of XDR buffer consumed
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* %-EMSGSIZE on XDR buffer overflow
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*/
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static inline ssize_t
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xdr_stream_encode_u64(struct xdr_stream *xdr, __u64 n)
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{
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const size_t len = sizeof(n);
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__be32 *p = xdr_reserve_space(xdr, len);
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if (unlikely(!p))
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return -EMSGSIZE;
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xdr_encode_hyper(p, n);
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return len;
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}
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/**
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* xdr_stream_encode_opaque_fixed - Encode fixed length opaque xdr data
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* @xdr: pointer to xdr_stream
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* @ptr: pointer to opaque data object
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* @len: size of object pointed to by @ptr
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*
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* Return values:
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* On success, returns length in bytes of XDR buffer consumed
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* %-EMSGSIZE on XDR buffer overflow
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*/
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static inline ssize_t
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xdr_stream_encode_opaque_fixed(struct xdr_stream *xdr, const void *ptr, size_t len)
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{
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__be32 *p = xdr_reserve_space(xdr, len);
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if (unlikely(!p))
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return -EMSGSIZE;
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xdr_encode_opaque_fixed(p, ptr, len);
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return xdr_align_size(len);
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}
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/**
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* xdr_stream_encode_opaque - Encode variable length opaque xdr data
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* @xdr: pointer to xdr_stream
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* @ptr: pointer to opaque data object
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* @len: size of object pointed to by @ptr
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*
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* Return values:
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* On success, returns length in bytes of XDR buffer consumed
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* %-EMSGSIZE on XDR buffer overflow
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*/
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static inline ssize_t
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xdr_stream_encode_opaque(struct xdr_stream *xdr, const void *ptr, size_t len)
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{
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size_t count = sizeof(__u32) + xdr_align_size(len);
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__be32 *p = xdr_reserve_space(xdr, count);
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if (unlikely(!p))
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return -EMSGSIZE;
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xdr_encode_opaque(p, ptr, len);
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return count;
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}
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/**
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* xdr_stream_decode_u32 - Decode a 32-bit integer
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* @xdr: pointer to xdr_stream
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* @ptr: location to store integer
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*
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* Return values:
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* %0 on success
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* %-EBADMSG on XDR buffer overflow
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*/
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static inline ssize_t
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xdr_stream_decode_u32(struct xdr_stream *xdr, __u32 *ptr)
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{
|
|
const size_t count = sizeof(*ptr);
|
|
__be32 *p = xdr_inline_decode(xdr, count);
|
|
|
|
if (unlikely(!p))
|
|
return -EBADMSG;
|
|
*ptr = be32_to_cpup(p);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* xdr_stream_decode_opaque_fixed - Decode fixed length opaque xdr data
|
|
* @xdr: pointer to xdr_stream
|
|
* @ptr: location to store data
|
|
* @len: size of buffer pointed to by @ptr
|
|
*
|
|
* Return values:
|
|
* On success, returns size of object stored in @ptr
|
|
* %-EBADMSG on XDR buffer overflow
|
|
*/
|
|
static inline ssize_t
|
|
xdr_stream_decode_opaque_fixed(struct xdr_stream *xdr, void *ptr, size_t len)
|
|
{
|
|
__be32 *p = xdr_inline_decode(xdr, len);
|
|
|
|
if (unlikely(!p))
|
|
return -EBADMSG;
|
|
xdr_decode_opaque_fixed(p, ptr, len);
|
|
return len;
|
|
}
|
|
|
|
/**
|
|
* xdr_stream_decode_opaque_inline - Decode variable length opaque xdr data
|
|
* @xdr: pointer to xdr_stream
|
|
* @ptr: location to store pointer to opaque data
|
|
* @maxlen: maximum acceptable object size
|
|
*
|
|
* Note: the pointer stored in @ptr cannot be assumed valid after the XDR
|
|
* buffer has been destroyed, or even after calling xdr_inline_decode()
|
|
* on @xdr. It is therefore expected that the object it points to should
|
|
* be processed immediately.
|
|
*
|
|
* Return values:
|
|
* On success, returns size of object stored in *@ptr
|
|
* %-EBADMSG on XDR buffer overflow
|
|
* %-EMSGSIZE if the size of the object would exceed @maxlen
|
|
*/
|
|
static inline ssize_t
|
|
xdr_stream_decode_opaque_inline(struct xdr_stream *xdr, void **ptr, size_t maxlen)
|
|
{
|
|
__be32 *p;
|
|
__u32 len;
|
|
|
|
*ptr = NULL;
|
|
if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
|
|
return -EBADMSG;
|
|
if (len != 0) {
|
|
p = xdr_inline_decode(xdr, len);
|
|
if (unlikely(!p))
|
|
return -EBADMSG;
|
|
if (unlikely(len > maxlen))
|
|
return -EMSGSIZE;
|
|
*ptr = p;
|
|
}
|
|
return len;
|
|
}
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _SUNRPC_XDR_H_ */
|