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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>
539 lines
12 KiB
C
539 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* In-kernel MOUNT protocol client
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*
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* Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/uio.h>
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#include <linux/net.h>
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#include <linux/in.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/nfs_fs.h>
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#include "internal.h"
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#define NFSDBG_FACILITY NFSDBG_MOUNT
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/*
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* Defined by RFC 1094, section A.3; and RFC 1813, section 5.1.4
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*/
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#define MNTPATHLEN (1024)
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/*
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* XDR data type sizes
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*/
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#define encode_dirpath_sz (1 + XDR_QUADLEN(MNTPATHLEN))
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#define MNT_status_sz (1)
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#define MNT_fhs_status_sz (1)
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#define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE)
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#define MNT_fhandle3_sz (1 + XDR_QUADLEN(NFS3_FHSIZE))
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#define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS)
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/*
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* XDR argument and result sizes
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*/
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#define MNT_enc_dirpath_sz encode_dirpath_sz
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#define MNT_dec_mountres_sz (MNT_status_sz + MNT_fhandle_sz)
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#define MNT_dec_mountres3_sz (MNT_status_sz + MNT_fhandle_sz + \
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MNT_authflav3_sz)
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/*
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* Defined by RFC 1094, section A.5
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*/
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enum {
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MOUNTPROC_NULL = 0,
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MOUNTPROC_MNT = 1,
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MOUNTPROC_DUMP = 2,
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MOUNTPROC_UMNT = 3,
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MOUNTPROC_UMNTALL = 4,
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MOUNTPROC_EXPORT = 5,
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};
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/*
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* Defined by RFC 1813, section 5.2
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*/
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enum {
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MOUNTPROC3_NULL = 0,
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MOUNTPROC3_MNT = 1,
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MOUNTPROC3_DUMP = 2,
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MOUNTPROC3_UMNT = 3,
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MOUNTPROC3_UMNTALL = 4,
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MOUNTPROC3_EXPORT = 5,
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};
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static const struct rpc_program mnt_program;
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/*
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* Defined by OpenGroup XNFS Version 3W, chapter 8
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*/
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enum mountstat {
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MNT_OK = 0,
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MNT_EPERM = 1,
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MNT_ENOENT = 2,
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MNT_EACCES = 13,
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MNT_EINVAL = 22,
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};
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static struct {
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u32 status;
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int errno;
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} mnt_errtbl[] = {
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{ .status = MNT_OK, .errno = 0, },
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{ .status = MNT_EPERM, .errno = -EPERM, },
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{ .status = MNT_ENOENT, .errno = -ENOENT, },
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{ .status = MNT_EACCES, .errno = -EACCES, },
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{ .status = MNT_EINVAL, .errno = -EINVAL, },
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};
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/*
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* Defined by RFC 1813, section 5.1.5
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*/
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enum mountstat3 {
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MNT3_OK = 0, /* no error */
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MNT3ERR_PERM = 1, /* Not owner */
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MNT3ERR_NOENT = 2, /* No such file or directory */
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MNT3ERR_IO = 5, /* I/O error */
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MNT3ERR_ACCES = 13, /* Permission denied */
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MNT3ERR_NOTDIR = 20, /* Not a directory */
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MNT3ERR_INVAL = 22, /* Invalid argument */
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MNT3ERR_NAMETOOLONG = 63, /* Filename too long */
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MNT3ERR_NOTSUPP = 10004, /* Operation not supported */
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MNT3ERR_SERVERFAULT = 10006, /* A failure on the server */
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};
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static struct {
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u32 status;
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int errno;
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} mnt3_errtbl[] = {
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{ .status = MNT3_OK, .errno = 0, },
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{ .status = MNT3ERR_PERM, .errno = -EPERM, },
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{ .status = MNT3ERR_NOENT, .errno = -ENOENT, },
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{ .status = MNT3ERR_IO, .errno = -EIO, },
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{ .status = MNT3ERR_ACCES, .errno = -EACCES, },
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{ .status = MNT3ERR_NOTDIR, .errno = -ENOTDIR, },
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{ .status = MNT3ERR_INVAL, .errno = -EINVAL, },
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{ .status = MNT3ERR_NAMETOOLONG, .errno = -ENAMETOOLONG, },
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{ .status = MNT3ERR_NOTSUPP, .errno = -ENOTSUPP, },
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{ .status = MNT3ERR_SERVERFAULT, .errno = -EREMOTEIO, },
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};
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struct mountres {
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int errno;
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struct nfs_fh *fh;
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unsigned int *auth_count;
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rpc_authflavor_t *auth_flavors;
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};
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struct mnt_fhstatus {
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u32 status;
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struct nfs_fh *fh;
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};
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/**
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* nfs_mount - Obtain an NFS file handle for the given host and path
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* @info: pointer to mount request arguments
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*
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* Uses default timeout parameters specified by underlying transport. On
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* successful return, the auth_flavs list and auth_flav_len will be populated
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* with the list from the server or a faked-up list if the server didn't
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* provide one.
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*/
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int nfs_mount(struct nfs_mount_request *info)
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{
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struct mountres result = {
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.fh = info->fh,
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.auth_count = info->auth_flav_len,
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.auth_flavors = info->auth_flavs,
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};
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struct rpc_message msg = {
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.rpc_argp = info->dirpath,
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.rpc_resp = &result,
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};
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struct rpc_create_args args = {
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.net = info->net,
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.protocol = info->protocol,
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.address = info->sap,
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.addrsize = info->salen,
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.servername = info->hostname,
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.program = &mnt_program,
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.version = info->version,
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.authflavor = RPC_AUTH_UNIX,
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};
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struct rpc_clnt *mnt_clnt;
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int status;
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dprintk("NFS: sending MNT request for %s:%s\n",
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(info->hostname ? info->hostname : "server"),
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info->dirpath);
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if (strlen(info->dirpath) > MNTPATHLEN)
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return -ENAMETOOLONG;
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if (info->noresvport)
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args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
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mnt_clnt = rpc_create(&args);
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if (IS_ERR(mnt_clnt))
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goto out_clnt_err;
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if (info->version == NFS_MNT3_VERSION)
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msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
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else
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msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT];
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status = rpc_call_sync(mnt_clnt, &msg, RPC_TASK_SOFT|RPC_TASK_TIMEOUT);
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rpc_shutdown_client(mnt_clnt);
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if (status < 0)
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goto out_call_err;
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if (result.errno != 0)
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goto out_mnt_err;
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dprintk("NFS: MNT request succeeded\n");
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status = 0;
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/*
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* If the server didn't provide a flavor list, allow the
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* client to try any flavor.
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*/
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if (info->version != NFS_MNT3_VERSION || *info->auth_flav_len == 0) {
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dprintk("NFS: Faking up auth_flavs list\n");
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info->auth_flavs[0] = RPC_AUTH_NULL;
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*info->auth_flav_len = 1;
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}
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out:
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return status;
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out_clnt_err:
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status = PTR_ERR(mnt_clnt);
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dprintk("NFS: failed to create MNT RPC client, status=%d\n", status);
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goto out;
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out_call_err:
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dprintk("NFS: MNT request failed, status=%d\n", status);
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goto out;
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out_mnt_err:
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dprintk("NFS: MNT server returned result %d\n", result.errno);
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status = result.errno;
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goto out;
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}
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/**
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* nfs_umount - Notify a server that we have unmounted this export
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* @info: pointer to umount request arguments
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*
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* MOUNTPROC_UMNT is advisory, so we set a short timeout, and always
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* use UDP.
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*/
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void nfs_umount(const struct nfs_mount_request *info)
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{
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static const struct rpc_timeout nfs_umnt_timeout = {
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.to_initval = 1 * HZ,
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.to_maxval = 3 * HZ,
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.to_retries = 2,
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};
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struct rpc_create_args args = {
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.net = info->net,
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.protocol = IPPROTO_UDP,
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.address = info->sap,
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.addrsize = info->salen,
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.timeout = &nfs_umnt_timeout,
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.servername = info->hostname,
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.program = &mnt_program,
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.version = info->version,
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.authflavor = RPC_AUTH_UNIX,
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.flags = RPC_CLNT_CREATE_NOPING,
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};
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struct rpc_message msg = {
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.rpc_argp = info->dirpath,
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};
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struct rpc_clnt *clnt;
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int status;
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if (strlen(info->dirpath) > MNTPATHLEN)
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return;
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if (info->noresvport)
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args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
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clnt = rpc_create(&args);
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if (IS_ERR(clnt))
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goto out_clnt_err;
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dprintk("NFS: sending UMNT request for %s:%s\n",
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(info->hostname ? info->hostname : "server"), info->dirpath);
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if (info->version == NFS_MNT3_VERSION)
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msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC3_UMNT];
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else
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msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC_UMNT];
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status = rpc_call_sync(clnt, &msg, 0);
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rpc_shutdown_client(clnt);
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if (unlikely(status < 0))
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goto out_call_err;
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return;
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out_clnt_err:
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dprintk("NFS: failed to create UMNT RPC client, status=%ld\n",
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PTR_ERR(clnt));
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return;
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out_call_err:
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dprintk("NFS: UMNT request failed, status=%d\n", status);
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}
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/*
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* XDR encode/decode functions for MOUNT
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*/
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static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname)
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{
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const u32 pathname_len = strlen(pathname);
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__be32 *p;
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p = xdr_reserve_space(xdr, 4 + pathname_len);
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xdr_encode_opaque(p, pathname, pathname_len);
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}
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static void mnt_xdr_enc_dirpath(struct rpc_rqst *req, struct xdr_stream *xdr,
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const void *dirpath)
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{
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encode_mntdirpath(xdr, dirpath);
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}
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/*
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* RFC 1094: "A non-zero status indicates some sort of error. In this
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* case, the status is a UNIX error number." This can be problematic
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* if the server and client use different errno values for the same
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* error.
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*
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* However, the OpenGroup XNFS spec provides a simple mapping that is
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* independent of local errno values on the server and the client.
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*/
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static int decode_status(struct xdr_stream *xdr, struct mountres *res)
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{
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unsigned int i;
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u32 status;
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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return -EIO;
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status = be32_to_cpup(p);
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for (i = 0; i < ARRAY_SIZE(mnt_errtbl); i++) {
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if (mnt_errtbl[i].status == status) {
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res->errno = mnt_errtbl[i].errno;
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return 0;
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}
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}
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dprintk("NFS: unrecognized MNT status code: %u\n", status);
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res->errno = -EACCES;
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return 0;
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}
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static int decode_fhandle(struct xdr_stream *xdr, struct mountres *res)
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{
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struct nfs_fh *fh = res->fh;
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__be32 *p;
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p = xdr_inline_decode(xdr, NFS2_FHSIZE);
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if (unlikely(p == NULL))
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return -EIO;
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fh->size = NFS2_FHSIZE;
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memcpy(fh->data, p, NFS2_FHSIZE);
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return 0;
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}
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static int mnt_xdr_dec_mountres(struct rpc_rqst *req,
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struct xdr_stream *xdr,
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void *data)
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{
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struct mountres *res = data;
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int status;
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status = decode_status(xdr, res);
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if (unlikely(status != 0 || res->errno != 0))
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return status;
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return decode_fhandle(xdr, res);
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}
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static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res)
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{
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unsigned int i;
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u32 status;
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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return -EIO;
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status = be32_to_cpup(p);
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for (i = 0; i < ARRAY_SIZE(mnt3_errtbl); i++) {
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if (mnt3_errtbl[i].status == status) {
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res->errno = mnt3_errtbl[i].errno;
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return 0;
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}
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}
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dprintk("NFS: unrecognized MNT3 status code: %u\n", status);
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res->errno = -EACCES;
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return 0;
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}
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static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res)
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{
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struct nfs_fh *fh = res->fh;
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u32 size;
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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return -EIO;
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size = be32_to_cpup(p);
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if (size > NFS3_FHSIZE || size == 0)
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return -EIO;
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p = xdr_inline_decode(xdr, size);
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if (unlikely(p == NULL))
|
|
return -EIO;
|
|
|
|
fh->size = size;
|
|
memcpy(fh->data, p, size);
|
|
return 0;
|
|
}
|
|
|
|
static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res)
|
|
{
|
|
rpc_authflavor_t *flavors = res->auth_flavors;
|
|
unsigned int *count = res->auth_count;
|
|
u32 entries, i;
|
|
__be32 *p;
|
|
|
|
if (*count == 0)
|
|
return 0;
|
|
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return -EIO;
|
|
entries = be32_to_cpup(p);
|
|
dprintk("NFS: received %u auth flavors\n", entries);
|
|
if (entries > NFS_MAX_SECFLAVORS)
|
|
entries = NFS_MAX_SECFLAVORS;
|
|
|
|
p = xdr_inline_decode(xdr, 4 * entries);
|
|
if (unlikely(p == NULL))
|
|
return -EIO;
|
|
|
|
if (entries > *count)
|
|
entries = *count;
|
|
|
|
for (i = 0; i < entries; i++) {
|
|
flavors[i] = be32_to_cpup(p++);
|
|
dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]);
|
|
}
|
|
*count = i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mnt_xdr_dec_mountres3(struct rpc_rqst *req,
|
|
struct xdr_stream *xdr,
|
|
void *data)
|
|
{
|
|
struct mountres *res = data;
|
|
int status;
|
|
|
|
status = decode_fhs_status(xdr, res);
|
|
if (unlikely(status != 0 || res->errno != 0))
|
|
return status;
|
|
status = decode_fhandle3(xdr, res);
|
|
if (unlikely(status != 0)) {
|
|
res->errno = -EBADHANDLE;
|
|
return 0;
|
|
}
|
|
return decode_auth_flavors(xdr, res);
|
|
}
|
|
|
|
static const struct rpc_procinfo mnt_procedures[] = {
|
|
[MOUNTPROC_MNT] = {
|
|
.p_proc = MOUNTPROC_MNT,
|
|
.p_encode = mnt_xdr_enc_dirpath,
|
|
.p_decode = mnt_xdr_dec_mountres,
|
|
.p_arglen = MNT_enc_dirpath_sz,
|
|
.p_replen = MNT_dec_mountres_sz,
|
|
.p_statidx = MOUNTPROC_MNT,
|
|
.p_name = "MOUNT",
|
|
},
|
|
[MOUNTPROC_UMNT] = {
|
|
.p_proc = MOUNTPROC_UMNT,
|
|
.p_encode = mnt_xdr_enc_dirpath,
|
|
.p_arglen = MNT_enc_dirpath_sz,
|
|
.p_statidx = MOUNTPROC_UMNT,
|
|
.p_name = "UMOUNT",
|
|
},
|
|
};
|
|
|
|
static const struct rpc_procinfo mnt3_procedures[] = {
|
|
[MOUNTPROC3_MNT] = {
|
|
.p_proc = MOUNTPROC3_MNT,
|
|
.p_encode = mnt_xdr_enc_dirpath,
|
|
.p_decode = mnt_xdr_dec_mountres3,
|
|
.p_arglen = MNT_enc_dirpath_sz,
|
|
.p_replen = MNT_dec_mountres3_sz,
|
|
.p_statidx = MOUNTPROC3_MNT,
|
|
.p_name = "MOUNT",
|
|
},
|
|
[MOUNTPROC3_UMNT] = {
|
|
.p_proc = MOUNTPROC3_UMNT,
|
|
.p_encode = mnt_xdr_enc_dirpath,
|
|
.p_arglen = MNT_enc_dirpath_sz,
|
|
.p_statidx = MOUNTPROC3_UMNT,
|
|
.p_name = "UMOUNT",
|
|
},
|
|
};
|
|
|
|
static unsigned int mnt_counts[ARRAY_SIZE(mnt_procedures)];
|
|
static const struct rpc_version mnt_version1 = {
|
|
.number = 1,
|
|
.nrprocs = ARRAY_SIZE(mnt_procedures),
|
|
.procs = mnt_procedures,
|
|
.counts = mnt_counts,
|
|
};
|
|
|
|
static unsigned int mnt3_counts[ARRAY_SIZE(mnt3_procedures)];
|
|
static const struct rpc_version mnt_version3 = {
|
|
.number = 3,
|
|
.nrprocs = ARRAY_SIZE(mnt3_procedures),
|
|
.procs = mnt3_procedures,
|
|
.counts = mnt3_counts,
|
|
};
|
|
|
|
static const struct rpc_version *mnt_version[] = {
|
|
NULL,
|
|
&mnt_version1,
|
|
NULL,
|
|
&mnt_version3,
|
|
};
|
|
|
|
static struct rpc_stat mnt_stats;
|
|
|
|
static const struct rpc_program mnt_program = {
|
|
.name = "mount",
|
|
.number = NFS_MNT_PROGRAM,
|
|
.nrvers = ARRAY_SIZE(mnt_version),
|
|
.version = mnt_version,
|
|
.stats = &mnt_stats,
|
|
};
|