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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>
538 lines
14 KiB
C
538 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/lockd/svc4proc.c
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*
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* Lockd server procedures. We don't implement the NLM_*_RES
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* procedures because we don't use the async procedures.
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/types.h>
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#include <linux/time.h>
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#include <linux/lockd/lockd.h>
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#include <linux/lockd/share.h>
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#include <linux/sunrpc/svc_xprt.h>
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#define NLMDBG_FACILITY NLMDBG_CLIENT
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/*
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* Obtain client and file from arguments
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*/
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static __be32
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nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
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struct nlm_host **hostp, struct nlm_file **filp)
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{
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struct nlm_host *host = NULL;
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struct nlm_file *file = NULL;
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struct nlm_lock *lock = &argp->lock;
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__be32 error = 0;
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/* nfsd callbacks must have been installed for this procedure */
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if (!nlmsvc_ops)
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return nlm_lck_denied_nolocks;
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/* Obtain host handle */
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if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
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|| (argp->monitor && nsm_monitor(host) < 0))
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goto no_locks;
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*hostp = host;
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/* Obtain file pointer. Not used by FREE_ALL call. */
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if (filp != NULL) {
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if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
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goto no_locks;
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*filp = file;
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/* Set up the missing parts of the file_lock structure */
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lock->fl.fl_file = file->f_file;
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lock->fl.fl_owner = (fl_owner_t) host;
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lock->fl.fl_lmops = &nlmsvc_lock_operations;
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}
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return 0;
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no_locks:
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nlmsvc_release_host(host);
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if (error)
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return error;
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return nlm_lck_denied_nolocks;
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}
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/*
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* NULL: Test for presence of service
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*/
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static __be32
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nlm4svc_proc_null(struct svc_rqst *rqstp)
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{
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dprintk("lockd: NULL called\n");
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return rpc_success;
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}
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/*
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* TEST: Check for conflicting lock
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*/
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static __be32
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__nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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__be32 rc = rpc_success;
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dprintk("lockd: TEST4 called\n");
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resp->cookie = argp->cookie;
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/* Obtain client and file */
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if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
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/* Now check for conflicting locks */
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resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie);
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if (resp->status == nlm_drop_reply)
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rc = rpc_drop_reply;
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else
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dprintk("lockd: TEST4 status %d\n", ntohl(resp->status));
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rc;
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}
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static __be32
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nlm4svc_proc_test(struct svc_rqst *rqstp)
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{
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return __nlm4svc_proc_test(rqstp, rqstp->rq_resp);
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}
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static __be32
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__nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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__be32 rc = rpc_success;
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dprintk("lockd: LOCK called\n");
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resp->cookie = argp->cookie;
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/* Obtain client and file */
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if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
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#if 0
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/* If supplied state doesn't match current state, we assume it's
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* an old request that time-warped somehow. Any error return would
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* do in this case because it's irrelevant anyway.
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*
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* NB: We don't retrieve the remote host's state yet.
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*/
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if (host->h_nsmstate && host->h_nsmstate != argp->state) {
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resp->status = nlm_lck_denied_nolocks;
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} else
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#endif
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/* Now try to lock the file */
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resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock,
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argp->block, &argp->cookie,
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argp->reclaim);
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if (resp->status == nlm_drop_reply)
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rc = rpc_drop_reply;
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else
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dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rc;
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}
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static __be32
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nlm4svc_proc_lock(struct svc_rqst *rqstp)
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{
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return __nlm4svc_proc_lock(rqstp, rqstp->rq_resp);
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}
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static __be32
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__nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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dprintk("lockd: CANCEL called\n");
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resp->cookie = argp->cookie;
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/* Don't accept requests during grace period */
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if (locks_in_grace(SVC_NET(rqstp))) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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/* Obtain client and file */
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if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
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/* Try to cancel request. */
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resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
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dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rpc_success;
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}
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static __be32
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nlm4svc_proc_cancel(struct svc_rqst *rqstp)
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{
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return __nlm4svc_proc_cancel(rqstp, rqstp->rq_resp);
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}
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/*
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* UNLOCK: release a lock
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*/
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static __be32
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__nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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dprintk("lockd: UNLOCK called\n");
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resp->cookie = argp->cookie;
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/* Don't accept new lock requests during grace period */
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if (locks_in_grace(SVC_NET(rqstp))) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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/* Obtain client and file */
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if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
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/* Now try to remove the lock */
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resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock);
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dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rpc_success;
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}
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static __be32
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nlm4svc_proc_unlock(struct svc_rqst *rqstp)
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{
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return __nlm4svc_proc_unlock(rqstp, rqstp->rq_resp);
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}
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/*
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* GRANTED: A server calls us to tell that a process' lock request
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* was granted
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*/
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static __be32
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__nlm4svc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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resp->cookie = argp->cookie;
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dprintk("lockd: GRANTED called\n");
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resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
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dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
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return rpc_success;
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}
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static __be32
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nlm4svc_proc_granted(struct svc_rqst *rqstp)
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{
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return __nlm4svc_proc_granted(rqstp, rqstp->rq_resp);
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}
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/*
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* This is the generic lockd callback for async RPC calls
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*/
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static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
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{
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dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
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-task->tk_status);
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}
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static void nlm4svc_callback_release(void *data)
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{
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nlmsvc_release_call(data);
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}
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static const struct rpc_call_ops nlm4svc_callback_ops = {
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.rpc_call_done = nlm4svc_callback_exit,
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.rpc_release = nlm4svc_callback_release,
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};
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/*
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* `Async' versions of the above service routines. They aren't really,
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* because we send the callback before the reply proper. I hope this
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* doesn't break any clients.
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*/
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static __be32 nlm4svc_callback(struct svc_rqst *rqstp, u32 proc,
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__be32 (*func)(struct svc_rqst *, struct nlm_res *))
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_rqst *call;
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__be32 stat;
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host = nlmsvc_lookup_host(rqstp,
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argp->lock.caller,
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argp->lock.len);
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if (host == NULL)
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return rpc_system_err;
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call = nlm_alloc_call(host);
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nlmsvc_release_host(host);
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if (call == NULL)
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return rpc_system_err;
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stat = func(rqstp, &call->a_res);
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if (stat != 0) {
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nlmsvc_release_call(call);
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return stat;
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}
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call->a_flags = RPC_TASK_ASYNC;
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if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0)
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return rpc_system_err;
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return rpc_success;
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}
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static __be32 nlm4svc_proc_test_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: TEST_MSG called\n");
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return nlm4svc_callback(rqstp, NLMPROC_TEST_RES, __nlm4svc_proc_test);
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}
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static __be32 nlm4svc_proc_lock_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: LOCK_MSG called\n");
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return nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, __nlm4svc_proc_lock);
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}
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static __be32 nlm4svc_proc_cancel_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: CANCEL_MSG called\n");
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return nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, __nlm4svc_proc_cancel);
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}
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static __be32 nlm4svc_proc_unlock_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: UNLOCK_MSG called\n");
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return nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlm4svc_proc_unlock);
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}
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static __be32 nlm4svc_proc_granted_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: GRANTED_MSG called\n");
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return nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, __nlm4svc_proc_granted);
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}
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/*
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* SHARE: create a DOS share or alter existing share.
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*/
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static __be32
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nlm4svc_proc_share(struct svc_rqst *rqstp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_res *resp = rqstp->rq_resp;
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struct nlm_host *host;
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struct nlm_file *file;
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dprintk("lockd: SHARE called\n");
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resp->cookie = argp->cookie;
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/* Don't accept new lock requests during grace period */
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if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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/* Obtain client and file */
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if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
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/* Now try to create the share */
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resp->status = nlmsvc_share_file(host, file, argp);
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dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rpc_success;
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}
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/*
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* UNSHARE: Release a DOS share.
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*/
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static __be32
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nlm4svc_proc_unshare(struct svc_rqst *rqstp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_res *resp = rqstp->rq_resp;
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struct nlm_host *host;
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struct nlm_file *file;
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dprintk("lockd: UNSHARE called\n");
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resp->cookie = argp->cookie;
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/* Don't accept requests during grace period */
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if (locks_in_grace(SVC_NET(rqstp))) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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/* Obtain client and file */
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if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
|
|
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
|
|
|
|
/* Now try to lock the file */
|
|
resp->status = nlmsvc_unshare_file(host, file, argp);
|
|
|
|
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
|
|
nlmsvc_release_host(host);
|
|
nlm_release_file(file);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* NM_LOCK: Create an unmonitored lock
|
|
*/
|
|
static __be32
|
|
nlm4svc_proc_nm_lock(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_args *argp = rqstp->rq_argp;
|
|
|
|
dprintk("lockd: NM_LOCK called\n");
|
|
|
|
argp->monitor = 0; /* just clean the monitor flag */
|
|
return nlm4svc_proc_lock(rqstp);
|
|
}
|
|
|
|
/*
|
|
* FREE_ALL: Release all locks and shares held by client
|
|
*/
|
|
static __be32
|
|
nlm4svc_proc_free_all(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_args *argp = rqstp->rq_argp;
|
|
struct nlm_host *host;
|
|
|
|
/* Obtain client */
|
|
if (nlm4svc_retrieve_args(rqstp, argp, &host, NULL))
|
|
return rpc_success;
|
|
|
|
nlmsvc_free_host_resources(host);
|
|
nlmsvc_release_host(host);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* SM_NOTIFY: private callback from statd (not part of official NLM proto)
|
|
*/
|
|
static __be32
|
|
nlm4svc_proc_sm_notify(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_reboot *argp = rqstp->rq_argp;
|
|
|
|
dprintk("lockd: SM_NOTIFY called\n");
|
|
|
|
if (!nlm_privileged_requester(rqstp)) {
|
|
char buf[RPC_MAX_ADDRBUFLEN];
|
|
printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
|
|
svc_print_addr(rqstp, buf, sizeof(buf)));
|
|
return rpc_system_err;
|
|
}
|
|
|
|
nlm_host_rebooted(SVC_NET(rqstp), argp);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* client sent a GRANTED_RES, let's remove the associated block
|
|
*/
|
|
static __be32
|
|
nlm4svc_proc_granted_res(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_res *argp = rqstp->rq_argp;
|
|
|
|
if (!nlmsvc_ops)
|
|
return rpc_success;
|
|
|
|
dprintk("lockd: GRANTED_RES called\n");
|
|
|
|
nlmsvc_grant_reply(&argp->cookie, argp->status);
|
|
return rpc_success;
|
|
}
|
|
|
|
|
|
/*
|
|
* NLM Server procedures.
|
|
*/
|
|
|
|
#define nlm4svc_encode_norep nlm4svc_encode_void
|
|
#define nlm4svc_decode_norep nlm4svc_decode_void
|
|
#define nlm4svc_decode_testres nlm4svc_decode_void
|
|
#define nlm4svc_decode_lockres nlm4svc_decode_void
|
|
#define nlm4svc_decode_unlockres nlm4svc_decode_void
|
|
#define nlm4svc_decode_cancelres nlm4svc_decode_void
|
|
#define nlm4svc_decode_grantedres nlm4svc_decode_void
|
|
|
|
#define nlm4svc_proc_none nlm4svc_proc_null
|
|
#define nlm4svc_proc_test_res nlm4svc_proc_null
|
|
#define nlm4svc_proc_lock_res nlm4svc_proc_null
|
|
#define nlm4svc_proc_cancel_res nlm4svc_proc_null
|
|
#define nlm4svc_proc_unlock_res nlm4svc_proc_null
|
|
|
|
struct nlm_void { int dummy; };
|
|
|
|
#define PROC(name, xargt, xrest, argt, rest, respsize) \
|
|
{ .pc_func = nlm4svc_proc_##name, \
|
|
.pc_decode = nlm4svc_decode_##xargt, \
|
|
.pc_encode = nlm4svc_encode_##xrest, \
|
|
.pc_release = NULL, \
|
|
.pc_argsize = sizeof(struct nlm_##argt), \
|
|
.pc_ressize = sizeof(struct nlm_##rest), \
|
|
.pc_xdrressize = respsize, \
|
|
}
|
|
#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
|
|
#define No (1+1024/4) /* netobj */
|
|
#define St 1 /* status */
|
|
#define Rg 4 /* range (offset + length) */
|
|
const struct svc_procedure nlmsvc_procedures4[] = {
|
|
PROC(null, void, void, void, void, 1),
|
|
PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),
|
|
PROC(lock, lockargs, res, args, res, Ck+St),
|
|
PROC(cancel, cancargs, res, args, res, Ck+St),
|
|
PROC(unlock, unlockargs, res, args, res, Ck+St),
|
|
PROC(granted, testargs, res, args, res, Ck+St),
|
|
PROC(test_msg, testargs, norep, args, void, 1),
|
|
PROC(lock_msg, lockargs, norep, args, void, 1),
|
|
PROC(cancel_msg, cancargs, norep, args, void, 1),
|
|
PROC(unlock_msg, unlockargs, norep, args, void, 1),
|
|
PROC(granted_msg, testargs, norep, args, void, 1),
|
|
PROC(test_res, testres, norep, res, void, 1),
|
|
PROC(lock_res, lockres, norep, res, void, 1),
|
|
PROC(cancel_res, cancelres, norep, res, void, 1),
|
|
PROC(unlock_res, unlockres, norep, res, void, 1),
|
|
PROC(granted_res, res, norep, res, void, 1),
|
|
/* statd callback */
|
|
PROC(sm_notify, reboot, void, reboot, void, 1),
|
|
PROC(none, void, void, void, void, 0),
|
|
PROC(none, void, void, void, void, 0),
|
|
PROC(none, void, void, void, void, 0),
|
|
PROC(share, shareargs, shareres, args, res, Ck+St+1),
|
|
PROC(unshare, shareargs, shareres, args, res, Ck+St+1),
|
|
PROC(nm_lock, lockargs, res, args, res, Ck+St),
|
|
PROC(free_all, notify, void, args, void, 1),
|
|
|
|
};
|