License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-17 06:20:36 +08:00
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/*
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* linux/fs/ioctl.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#include <linux/syscalls.h>
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#include <linux/mm.h>
|
2006-01-12 04:17:46 +08:00
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#include <linux/capability.h>
|
2018-09-11 22:55:03 +08:00
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#include <linux/compat.h>
|
2005-04-17 06:20:36 +08:00
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/security.h>
|
2011-11-17 12:57:37 +08:00
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#include <linux/export.h>
|
2008-02-07 16:13:23 +08:00
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#include <linux/uaccess.h>
|
2008-10-04 05:32:43 +08:00
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#include <linux/writeback.h>
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|
#include <linux/buffer_head.h>
|
2009-06-20 02:28:07 +08:00
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#include <linux/falloc.h>
|
2017-02-04 06:47:37 +08:00
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#include <linux/sched/signal.h>
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|
2016-01-07 22:53:30 +08:00
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#include "internal.h"
|
2005-04-17 06:20:36 +08:00
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#include <asm/ioctls.h>
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2008-10-09 07:44:18 +08:00
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/* So that the fiemap access checks can't overflow on 32 bit machines. */
|
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|
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#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
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|
2008-02-07 16:13:25 +08:00
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/**
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* vfs_ioctl - call filesystem specific ioctl methods
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2008-02-09 16:10:16 +08:00
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* @filp: open file to invoke ioctl method on
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* @cmd: ioctl command to execute
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* @arg: command-specific argument for ioctl
|
2008-02-07 16:13:25 +08:00
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*
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* Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise
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* returns -ENOTTY.
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*
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* Returns 0 on success, -errno on error.
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*/
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2016-01-07 22:53:30 +08:00
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long vfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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2005-04-17 06:20:36 +08:00
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|
{
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int error = -ENOTTY;
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2013-09-23 04:27:52 +08:00
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if (!filp->f_op->unlocked_ioctl)
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2005-04-17 06:20:36 +08:00
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goto out;
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2010-07-04 06:15:10 +08:00
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error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
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if (error == -ENOIOCTLCMD)
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2012-01-06 07:40:12 +08:00
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error = -ENOTTY;
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2005-04-17 06:20:36 +08:00
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out:
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return error;
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}
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2018-07-18 21:44:40 +08:00
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EXPORT_SYMBOL(vfs_ioctl);
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2005-04-17 06:20:36 +08:00
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2008-02-07 16:13:25 +08:00
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static int ioctl_fibmap(struct file *filp, int __user *p)
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{
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2020-01-09 21:30:44 +08:00
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struct inode *inode = file_inode(filp);
|
2020-04-30 22:57:46 +08:00
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struct super_block *sb = inode->i_sb;
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2020-01-09 21:30:44 +08:00
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int error, ur_block;
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sector_t block;
|
2008-02-07 16:13:25 +08:00
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
|
2020-01-09 21:30:44 +08:00
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error = get_user(ur_block, p);
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if (error)
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return error;
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|
2020-01-09 21:30:45 +08:00
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|
if (ur_block < 0)
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return -EINVAL;
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2020-01-09 21:30:44 +08:00
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block = ur_block;
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error = bmap(inode, &block);
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2020-04-30 22:57:46 +08:00
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if (block > INT_MAX) {
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error = -ERANGE;
|
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pr_warn_ratelimited("[%s/%d] FS: %s File: %pD4 would truncate fibmap result\n",
|
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|
|
current->comm, task_pid_nr(current),
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sb->s_id, filp);
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}
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2020-01-09 21:30:44 +08:00
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if (error)
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ur_block = 0;
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else
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ur_block = block;
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if (put_user(ur_block, p))
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error = -EFAULT;
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return error;
|
2008-02-07 16:13:25 +08:00
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}
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2008-10-09 07:44:18 +08:00
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/**
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* fiemap_fill_next_extent - Fiemap helper function
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* @fieinfo: Fiemap context passed into ->fiemap
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* @logical: Extent logical start offset, in bytes
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* @phys: Extent physical start offset, in bytes
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* @len: Extent length, in bytes
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* @flags: FIEMAP_EXTENT flags that describe this extent
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*
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* Called from file system ->fiemap callback. Will populate extent
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* info as passed in via arguments and copy to user memory. On
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* success, extent count on fieinfo is incremented.
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*
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* Returns 0 on success, -errno on error, 1 if this was the last
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* extent that will fit in user array.
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*/
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#define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC)
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#define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED)
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#define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE)
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int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
|
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u64 phys, u64 len, u32 flags)
|
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{
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struct fiemap_extent extent;
|
2011-01-16 22:28:17 +08:00
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struct fiemap_extent __user *dest = fieinfo->fi_extents_start;
|
2008-10-09 07:44:18 +08:00
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/* only count the extents */
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if (fieinfo->fi_extents_max == 0) {
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fieinfo->fi_extents_mapped++;
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return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
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}
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if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max)
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return 1;
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if (flags & SET_UNKNOWN_FLAGS)
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flags |= FIEMAP_EXTENT_UNKNOWN;
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if (flags & SET_NO_UNMOUNTED_IO_FLAGS)
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flags |= FIEMAP_EXTENT_ENCODED;
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if (flags & SET_NOT_ALIGNED_FLAGS)
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flags |= FIEMAP_EXTENT_NOT_ALIGNED;
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memset(&extent, 0, sizeof(extent));
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extent.fe_logical = logical;
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extent.fe_physical = phys;
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extent.fe_length = len;
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extent.fe_flags = flags;
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dest += fieinfo->fi_extents_mapped;
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if (copy_to_user(dest, &extent, sizeof(extent)))
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return -EFAULT;
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fieinfo->fi_extents_mapped++;
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|
if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max)
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|
return 1;
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|
return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
|
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}
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|
EXPORT_SYMBOL(fiemap_fill_next_extent);
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|
/**
|
|
|
|
* fiemap_check_flags - check validity of requested flags for fiemap
|
|
|
|
* @fieinfo: Fiemap context passed into ->fiemap
|
|
|
|
* @fs_flags: Set of fiemap flags that the file system understands
|
|
|
|
*
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|
|
* Called from file system ->fiemap callback. This will compute the
|
|
|
|
* intersection of valid fiemap flags and those that the fs supports. That
|
|
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|
* value is then compared against the user supplied flags. In case of bad user
|
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* flags, the invalid values will be written into the fieinfo structure, and
|
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* -EBADR is returned, which tells ioctl_fiemap() to return those values to
|
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* userspace. For this reason, a return code of -EBADR should be preserved.
|
|
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|
*
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* Returns 0 on success, -EBADR on bad flags.
|
|
|
|
*/
|
|
|
|
int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags)
|
|
|
|
{
|
|
|
|
u32 incompat_flags;
|
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|
|
incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags);
|
|
|
|
if (incompat_flags) {
|
|
|
|
fieinfo->fi_flags = incompat_flags;
|
|
|
|
return -EBADR;
|
|
|
|
}
|
|
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|
return 0;
|
|
|
|
}
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|
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|
EXPORT_SYMBOL(fiemap_check_flags);
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|
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|
static int fiemap_check_ranges(struct super_block *sb,
|
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|
|
u64 start, u64 len, u64 *new_len)
|
|
|
|
{
|
2009-09-19 04:05:50 +08:00
|
|
|
u64 maxbytes = (u64) sb->s_maxbytes;
|
|
|
|
|
2008-10-09 07:44:18 +08:00
|
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*new_len = len;
|
|
|
|
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|
|
|
if (len == 0)
|
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|
|
return -EINVAL;
|
|
|
|
|
2009-09-19 04:05:50 +08:00
|
|
|
if (start > maxbytes)
|
2008-10-09 07:44:18 +08:00
|
|
|
return -EFBIG;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Shrink request scope to what the fs can actually handle.
|
|
|
|
*/
|
2009-09-19 04:05:50 +08:00
|
|
|
if (len > maxbytes || (maxbytes - len) < start)
|
|
|
|
*new_len = maxbytes - start;
|
2008-10-09 07:44:18 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2019-04-22 06:45:28 +08:00
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|
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static int ioctl_fiemap(struct file *filp, struct fiemap __user *ufiemap)
|
2008-10-09 07:44:18 +08:00
|
|
|
{
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|
struct fiemap fiemap;
|
|
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struct fiemap_extent_info fieinfo = { 0, };
|
2013-01-24 06:07:38 +08:00
|
|
|
struct inode *inode = file_inode(filp);
|
2008-10-09 07:44:18 +08:00
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struct super_block *sb = inode->i_sb;
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|
|
u64 len;
|
|
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|
int error;
|
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|
|
|
if (!inode->i_op->fiemap)
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|
return -EOPNOTSUPP;
|
|
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|
|
2011-01-16 22:28:17 +08:00
|
|
|
if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
|
2008-10-09 07:44:18 +08:00
|
|
|
return -EFAULT;
|
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|
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|
|
if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
|
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|
|
return -EINVAL;
|
|
|
|
|
|
|
|
error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
|
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|
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&len);
|
|
|
|
if (error)
|
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|
return error;
|
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|
|
|
|
|
|
fieinfo.fi_flags = fiemap.fm_flags;
|
|
|
|
fieinfo.fi_extents_max = fiemap.fm_extent_count;
|
2011-01-16 22:28:17 +08:00
|
|
|
fieinfo.fi_extents_start = ufiemap->fm_extents;
|
2008-10-09 07:44:18 +08:00
|
|
|
|
|
|
|
if (fiemap.fm_extent_count != 0 &&
|
Remove 'type' argument from access_ok() function
Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument
of the user address range verification function since we got rid of the
old racy i386-only code to walk page tables by hand.
It existed because the original 80386 would not honor the write protect
bit when in kernel mode, so you had to do COW by hand before doing any
user access. But we haven't supported that in a long time, and these
days the 'type' argument is a purely historical artifact.
A discussion about extending 'user_access_begin()' to do the range
checking resulted this patch, because there is no way we're going to
move the old VERIFY_xyz interface to that model. And it's best done at
the end of the merge window when I've done most of my merges, so let's
just get this done once and for all.
This patch was mostly done with a sed-script, with manual fix-ups for
the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form.
There were a couple of notable cases:
- csky still had the old "verify_area()" name as an alias.
- the iter_iov code had magical hardcoded knowledge of the actual
values of VERIFY_{READ,WRITE} (not that they mattered, since nothing
really used it)
- microblaze used the type argument for a debug printout
but other than those oddities this should be a total no-op patch.
I tried to fix up all architectures, did fairly extensive grepping for
access_ok() uses, and the changes are trivial, but I may have missed
something. Any missed conversion should be trivially fixable, though.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-04 10:57:57 +08:00
|
|
|
!access_ok(fieinfo.fi_extents_start,
|
2008-10-09 07:44:18 +08:00
|
|
|
fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
|
|
|
|
filemap_write_and_wait(inode->i_mapping);
|
|
|
|
|
|
|
|
error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len);
|
|
|
|
fiemap.fm_flags = fieinfo.fi_flags;
|
|
|
|
fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
|
2011-01-16 22:28:17 +08:00
|
|
|
if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
|
2008-10-09 07:44:18 +08:00
|
|
|
error = -EFAULT;
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2015-12-03 19:59:50 +08:00
|
|
|
static long ioctl_file_clone(struct file *dst_file, unsigned long srcfd,
|
|
|
|
u64 off, u64 olen, u64 destoff)
|
|
|
|
{
|
|
|
|
struct fd src_file = fdget(srcfd);
|
2018-10-30 07:41:49 +08:00
|
|
|
loff_t cloned;
|
2015-12-03 19:59:50 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!src_file.file)
|
|
|
|
return -EBADF;
|
2016-09-23 16:38:10 +08:00
|
|
|
ret = -EXDEV;
|
|
|
|
if (src_file.file->f_path.mnt != dst_file->f_path.mnt)
|
|
|
|
goto fdput;
|
2018-10-30 07:41:49 +08:00
|
|
|
cloned = vfs_clone_file_range(src_file.file, off, dst_file, destoff,
|
2018-10-30 07:41:56 +08:00
|
|
|
olen, 0);
|
2018-10-30 07:41:49 +08:00
|
|
|
if (cloned < 0)
|
|
|
|
ret = cloned;
|
|
|
|
else if (olen && cloned != olen)
|
|
|
|
ret = -EINVAL;
|
|
|
|
else
|
|
|
|
ret = 0;
|
2016-09-23 16:38:10 +08:00
|
|
|
fdput:
|
2015-12-03 19:59:50 +08:00
|
|
|
fdput(src_file);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2019-04-22 06:45:28 +08:00
|
|
|
static long ioctl_file_clone_range(struct file *file,
|
|
|
|
struct file_clone_range __user *argp)
|
2015-12-03 19:59:50 +08:00
|
|
|
{
|
|
|
|
struct file_clone_range args;
|
|
|
|
|
|
|
|
if (copy_from_user(&args, argp, sizeof(args)))
|
|
|
|
return -EFAULT;
|
|
|
|
return ioctl_file_clone(file, args.src_fd, args.src_offset,
|
|
|
|
args.src_length, args.dest_offset);
|
|
|
|
}
|
|
|
|
|
2008-10-12 12:15:19 +08:00
|
|
|
#ifdef CONFIG_BLOCK
|
|
|
|
|
2010-04-24 00:17:17 +08:00
|
|
|
static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
|
|
|
|
{
|
|
|
|
return (offset >> inode->i_blkbits);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
|
|
|
|
{
|
|
|
|
return (blk << inode->i_blkbits);
|
|
|
|
}
|
2008-10-04 05:32:43 +08:00
|
|
|
|
2008-10-14 21:43:29 +08:00
|
|
|
/**
|
|
|
|
* __generic_block_fiemap - FIEMAP for block based inodes (no locking)
|
2010-04-24 00:17:17 +08:00
|
|
|
* @inode: the inode to map
|
|
|
|
* @fieinfo: the fiemap info struct that will be passed back to userspace
|
|
|
|
* @start: where to start mapping in the inode
|
|
|
|
* @len: how much space to map
|
|
|
|
* @get_block: the fs's get_block function
|
2008-10-04 05:32:43 +08:00
|
|
|
*
|
|
|
|
* This does FIEMAP for block based inodes. Basically it will just loop
|
|
|
|
* through get_block until we hit the number of extents we want to map, or we
|
|
|
|
* go past the end of the file and hit a hole.
|
|
|
|
*
|
|
|
|
* If it is possible to have data blocks beyond a hole past @inode->i_size, then
|
|
|
|
* please do not use this function, it will stop at the first unmapped block
|
2008-10-14 21:43:29 +08:00
|
|
|
* beyond i_size.
|
|
|
|
*
|
|
|
|
* If you use this function directly, you need to do your own locking. Use
|
|
|
|
* generic_block_fiemap if you want the locking done for you.
|
2008-10-04 05:32:43 +08:00
|
|
|
*/
|
2008-10-14 21:43:29 +08:00
|
|
|
|
|
|
|
int __generic_block_fiemap(struct inode *inode,
|
2010-04-24 00:17:17 +08:00
|
|
|
struct fiemap_extent_info *fieinfo, loff_t start,
|
|
|
|
loff_t len, get_block_t *get_block)
|
2008-10-04 05:32:43 +08:00
|
|
|
{
|
2010-04-24 00:17:17 +08:00
|
|
|
struct buffer_head map_bh;
|
|
|
|
sector_t start_blk, last_blk;
|
|
|
|
loff_t isize = i_size_read(inode);
|
2008-10-04 05:32:43 +08:00
|
|
|
u64 logical = 0, phys = 0, size = 0;
|
|
|
|
u32 flags = FIEMAP_EXTENT_MERGED;
|
2010-04-24 00:17:17 +08:00
|
|
|
bool past_eof = false, whole_file = false;
|
|
|
|
int ret = 0;
|
2008-10-04 05:32:43 +08:00
|
|
|
|
2010-04-24 00:17:17 +08:00
|
|
|
ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
|
|
|
|
if (ret)
|
2008-10-04 05:32:43 +08:00
|
|
|
return ret;
|
|
|
|
|
2010-04-24 00:17:17 +08:00
|
|
|
/*
|
|
|
|
* Either the i_mutex or other appropriate locking needs to be held
|
|
|
|
* since we expect isize to not change at all through the duration of
|
|
|
|
* this call.
|
|
|
|
*/
|
|
|
|
if (len >= isize) {
|
|
|
|
whole_file = true;
|
|
|
|
len = isize;
|
|
|
|
}
|
2009-05-07 07:02:53 +08:00
|
|
|
|
2011-02-02 07:52:47 +08:00
|
|
|
/*
|
|
|
|
* Some filesystems can't deal with being asked to map less than
|
|
|
|
* blocksize, so make sure our len is at least block length.
|
|
|
|
*/
|
|
|
|
if (logical_to_blk(inode, len) == 0)
|
|
|
|
len = blk_to_logical(inode, 1);
|
|
|
|
|
2010-04-24 00:17:17 +08:00
|
|
|
start_blk = logical_to_blk(inode, start);
|
|
|
|
last_blk = logical_to_blk(inode, start + len - 1);
|
2008-10-04 05:32:43 +08:00
|
|
|
|
|
|
|
do {
|
|
|
|
/*
|
|
|
|
* we set b_size to the total size we want so it will map as
|
|
|
|
* many contiguous blocks as possible at once
|
|
|
|
*/
|
2010-04-24 00:17:17 +08:00
|
|
|
memset(&map_bh, 0, sizeof(struct buffer_head));
|
|
|
|
map_bh.b_size = len;
|
2008-10-04 05:32:43 +08:00
|
|
|
|
2010-04-24 00:17:17 +08:00
|
|
|
ret = get_block(inode, start_blk, &map_bh, 0);
|
2008-10-04 05:32:43 +08:00
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* HOLE */
|
2010-04-24 00:17:17 +08:00
|
|
|
if (!buffer_mapped(&map_bh)) {
|
2009-05-07 07:02:53 +08:00
|
|
|
start_blk++;
|
|
|
|
|
|
|
|
/*
|
2010-04-24 00:17:17 +08:00
|
|
|
* We want to handle the case where there is an
|
2009-05-07 07:02:53 +08:00
|
|
|
* allocated block at the front of the file, and then
|
|
|
|
* nothing but holes up to the end of the file properly,
|
|
|
|
* to make sure that extent at the front gets properly
|
|
|
|
* marked with FIEMAP_EXTENT_LAST
|
|
|
|
*/
|
|
|
|
if (!past_eof &&
|
2010-04-24 00:17:17 +08:00
|
|
|
blk_to_logical(inode, start_blk) >= isize)
|
2009-05-07 07:02:53 +08:00
|
|
|
past_eof = 1;
|
|
|
|
|
2008-10-04 05:32:43 +08:00
|
|
|
/*
|
2010-04-24 00:17:17 +08:00
|
|
|
* First hole after going past the EOF, this is our
|
2008-10-04 05:32:43 +08:00
|
|
|
* last extent
|
|
|
|
*/
|
2009-05-07 07:02:53 +08:00
|
|
|
if (past_eof && size) {
|
2008-10-04 05:32:43 +08:00
|
|
|
flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST;
|
|
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
|
|
phys, size,
|
|
|
|
flags);
|
2010-04-24 00:17:17 +08:00
|
|
|
} else if (size) {
|
|
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
|
|
phys, size, flags);
|
|
|
|
size = 0;
|
2008-10-04 05:32:43 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* if we have holes up to/past EOF then we're done */
|
2010-04-24 00:17:17 +08:00
|
|
|
if (start_blk > last_blk || past_eof || ret)
|
2008-10-04 05:32:43 +08:00
|
|
|
break;
|
|
|
|
} else {
|
2009-05-07 07:02:53 +08:00
|
|
|
/*
|
2010-04-24 00:17:17 +08:00
|
|
|
* We have gone over the length of what we wanted to
|
2009-05-07 07:02:53 +08:00
|
|
|
* map, and it wasn't the entire file, so add the extent
|
|
|
|
* we got last time and exit.
|
|
|
|
*
|
|
|
|
* This is for the case where say we want to map all the
|
|
|
|
* way up to the second to the last block in a file, but
|
|
|
|
* the last block is a hole, making the second to last
|
|
|
|
* block FIEMAP_EXTENT_LAST. In this case we want to
|
|
|
|
* see if there is a hole after the second to last block
|
|
|
|
* so we can mark it properly. If we found data after
|
|
|
|
* we exceeded the length we were requesting, then we
|
|
|
|
* are good to go, just add the extent to the fieinfo
|
|
|
|
* and break
|
|
|
|
*/
|
2010-04-24 00:17:17 +08:00
|
|
|
if (start_blk > last_blk && !whole_file) {
|
2009-05-07 07:02:53 +08:00
|
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
|
|
phys, size,
|
|
|
|
flags);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* if size != 0 then we know we already have an extent
|
|
|
|
* to add, so add it.
|
|
|
|
*/
|
|
|
|
if (size) {
|
2008-10-04 05:32:43 +08:00
|
|
|
ret = fiemap_fill_next_extent(fieinfo, logical,
|
|
|
|
phys, size,
|
|
|
|
flags);
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
logical = blk_to_logical(inode, start_blk);
|
2010-04-24 00:17:17 +08:00
|
|
|
phys = blk_to_logical(inode, map_bh.b_blocknr);
|
|
|
|
size = map_bh.b_size;
|
2008-10-04 05:32:43 +08:00
|
|
|
flags = FIEMAP_EXTENT_MERGED;
|
|
|
|
|
|
|
|
start_blk += logical_to_blk(inode, size);
|
|
|
|
|
|
|
|
/*
|
2009-05-07 07:02:53 +08:00
|
|
|
* If we are past the EOF, then we need to make sure as
|
|
|
|
* soon as we find a hole that the last extent we found
|
|
|
|
* is marked with FIEMAP_EXTENT_LAST
|
2008-10-04 05:32:43 +08:00
|
|
|
*/
|
2010-04-24 00:17:17 +08:00
|
|
|
if (!past_eof && logical + size >= isize)
|
|
|
|
past_eof = true;
|
2008-10-04 05:32:43 +08:00
|
|
|
}
|
|
|
|
cond_resched();
|
2015-02-11 06:09:29 +08:00
|
|
|
if (fatal_signal_pending(current)) {
|
|
|
|
ret = -EINTR;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-10-04 05:32:43 +08:00
|
|
|
} while (1);
|
|
|
|
|
2010-04-24 00:17:17 +08:00
|
|
|
/* If ret is 1 then we just hit the end of the extent array */
|
2008-10-04 05:32:43 +08:00
|
|
|
if (ret == 1)
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2008-10-14 21:43:29 +08:00
|
|
|
EXPORT_SYMBOL(__generic_block_fiemap);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* generic_block_fiemap - FIEMAP for block based inodes
|
|
|
|
* @inode: The inode to map
|
|
|
|
* @fieinfo: The mapping information
|
|
|
|
* @start: The initial block to map
|
|
|
|
* @len: The length of the extect to attempt to map
|
|
|
|
* @get_block: The block mapping function for the fs
|
|
|
|
*
|
|
|
|
* Calls __generic_block_fiemap to map the inode, after taking
|
|
|
|
* the inode's mutex lock.
|
|
|
|
*/
|
|
|
|
|
|
|
|
int generic_block_fiemap(struct inode *inode,
|
|
|
|
struct fiemap_extent_info *fieinfo, u64 start,
|
|
|
|
u64 len, get_block_t *get_block)
|
|
|
|
{
|
|
|
|
int ret;
|
2016-01-23 04:40:57 +08:00
|
|
|
inode_lock(inode);
|
2008-10-14 21:43:29 +08:00
|
|
|
ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block);
|
2016-01-23 04:40:57 +08:00
|
|
|
inode_unlock(inode);
|
2008-10-14 21:43:29 +08:00
|
|
|
return ret;
|
|
|
|
}
|
2008-10-04 05:32:43 +08:00
|
|
|
EXPORT_SYMBOL(generic_block_fiemap);
|
|
|
|
|
2008-10-12 12:15:19 +08:00
|
|
|
#endif /* CONFIG_BLOCK */
|
|
|
|
|
2009-06-20 02:28:07 +08:00
|
|
|
/*
|
|
|
|
* This provides compatibility with legacy XFS pre-allocation ioctls
|
|
|
|
* which predate the fallocate syscall.
|
|
|
|
*
|
|
|
|
* Only the l_start, l_len and l_whence fields of the 'struct space_resv'
|
|
|
|
* are used here, rest are ignored.
|
|
|
|
*/
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
static int ioctl_preallocate(struct file *filp, int mode, void __user *argp)
|
2009-06-20 02:28:07 +08:00
|
|
|
{
|
2013-01-24 06:07:38 +08:00
|
|
|
struct inode *inode = file_inode(filp);
|
2009-06-20 02:28:07 +08:00
|
|
|
struct space_resv sr;
|
|
|
|
|
|
|
|
if (copy_from_user(&sr, argp, sizeof(sr)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
switch (sr.l_whence) {
|
|
|
|
case SEEK_SET:
|
|
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
|
|
sr.l_start += filp->f_pos;
|
|
|
|
break;
|
|
|
|
case SEEK_END:
|
|
|
|
sr.l_start += i_size_read(inode);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2019-10-25 13:26:02 +08:00
|
|
|
return vfs_fallocate(filp, mode | FALLOC_FL_KEEP_SIZE, sr.l_start,
|
|
|
|
sr.l_len);
|
2009-06-20 02:28:07 +08:00
|
|
|
}
|
|
|
|
|
2019-04-22 07:24:03 +08:00
|
|
|
/* on ia32 l_start is on a 32-bit boundary */
|
|
|
|
#if defined CONFIG_COMPAT && defined(CONFIG_X86_64)
|
|
|
|
/* just account for different alignment */
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
static int compat_ioctl_preallocate(struct file *file, int mode,
|
|
|
|
struct space_resv_32 __user *argp)
|
2019-04-22 07:24:03 +08:00
|
|
|
{
|
|
|
|
struct inode *inode = file_inode(file);
|
|
|
|
struct space_resv_32 sr;
|
|
|
|
|
|
|
|
if (copy_from_user(&sr, argp, sizeof(sr)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
switch (sr.l_whence) {
|
|
|
|
case SEEK_SET:
|
|
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
|
|
sr.l_start += file->f_pos;
|
|
|
|
break;
|
|
|
|
case SEEK_END:
|
|
|
|
sr.l_start += i_size_read(inode);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2019-12-03 06:46:22 +08:00
|
|
|
return vfs_fallocate(file, mode | FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
|
2019-04-22 07:24:03 +08:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
static int file_ioctl(struct file *filp, unsigned int cmd, int __user *p)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
switch (cmd) {
|
2008-02-07 16:13:23 +08:00
|
|
|
case FIBMAP:
|
2008-02-07 16:13:25 +08:00
|
|
|
return ioctl_fibmap(filp, p);
|
2009-06-20 02:28:07 +08:00
|
|
|
case FS_IOC_RESVSP:
|
|
|
|
case FS_IOC_RESVSP64:
|
2019-10-25 13:26:02 +08:00
|
|
|
return ioctl_preallocate(filp, 0, p);
|
|
|
|
case FS_IOC_UNRESVSP:
|
|
|
|
case FS_IOC_UNRESVSP64:
|
|
|
|
return ioctl_preallocate(filp, FALLOC_FL_PUNCH_HOLE, p);
|
|
|
|
case FS_IOC_ZERO_RANGE:
|
|
|
|
return ioctl_preallocate(filp, FALLOC_FL_ZERO_RANGE, p);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return -ENOIOCTLCMD;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-02-07 16:13:25 +08:00
|
|
|
static int ioctl_fionbio(struct file *filp, int __user *argp)
|
|
|
|
{
|
|
|
|
unsigned int flag;
|
|
|
|
int on, error;
|
|
|
|
|
|
|
|
error = get_user(on, argp);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
flag = O_NONBLOCK;
|
|
|
|
#ifdef __sparc__
|
|
|
|
/* SunOS compatibility item. */
|
|
|
|
if (O_NONBLOCK != O_NDELAY)
|
|
|
|
flag |= O_NDELAY;
|
|
|
|
#endif
|
2009-02-07 06:25:24 +08:00
|
|
|
spin_lock(&filp->f_lock);
|
2008-02-07 16:13:25 +08:00
|
|
|
if (on)
|
|
|
|
filp->f_flags |= flag;
|
|
|
|
else
|
|
|
|
filp->f_flags &= ~flag;
|
2009-02-07 06:25:24 +08:00
|
|
|
spin_unlock(&filp->f_lock);
|
2008-02-07 16:13:25 +08:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ioctl_fioasync(unsigned int fd, struct file *filp,
|
|
|
|
int __user *argp)
|
|
|
|
{
|
|
|
|
unsigned int flag;
|
|
|
|
int on, error;
|
|
|
|
|
|
|
|
error = get_user(on, argp);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
flag = on ? FASYNC : 0;
|
|
|
|
|
|
|
|
/* Did FASYNC state change ? */
|
|
|
|
if ((flag ^ filp->f_flags) & FASYNC) {
|
2013-09-23 04:27:52 +08:00
|
|
|
if (filp->f_op->fasync)
|
2009-02-02 05:26:59 +08:00
|
|
|
/* fasync() adjusts filp->f_flags */
|
2008-02-07 16:13:25 +08:00
|
|
|
error = filp->f_op->fasync(fd, filp, on);
|
2008-12-06 07:12:48 +08:00
|
|
|
else
|
2008-02-07 16:13:25 +08:00
|
|
|
error = -ENOTTY;
|
|
|
|
}
|
2009-02-02 05:52:56 +08:00
|
|
|
return error < 0 ? error : 0;
|
2008-02-07 16:13:25 +08:00
|
|
|
}
|
|
|
|
|
2009-01-10 08:40:59 +08:00
|
|
|
static int ioctl_fsfreeze(struct file *filp)
|
|
|
|
{
|
2013-01-24 06:07:38 +08:00
|
|
|
struct super_block *sb = file_inode(filp)->i_sb;
|
2009-01-10 08:40:59 +08:00
|
|
|
|
2015-02-16 04:35:35 +08:00
|
|
|
if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
|
2009-01-10 08:40:59 +08:00
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
/* If filesystem doesn't support freeze feature, return. */
|
fs: add freeze_super/thaw_super fs hooks
Currently, freezing a filesystem involves calling freeze_super, which locks
sb->s_umount and then calls the fs-specific freeze_fs hook. This makes it
hard for gfs2 (and potentially other cluster filesystems) to use the vfs
freezing code to do freezes on all the cluster nodes.
In order to communicate that a freeze has been requested, and to make sure
that only one node is trying to freeze at a time, gfs2 uses a glock
(sd_freeze_gl). The problem is that there is no hook for gfs2 to acquire
this lock before calling freeze_super. This means that two nodes can
attempt to freeze the filesystem by both calling freeze_super, acquiring
the sb->s_umount lock, and then attempting to grab the cluster glock
sd_freeze_gl. Only one will succeed, and the other will be stuck in
freeze_super, making it impossible to finish freezing the node.
To solve this problem, this patch adds the freeze_super and thaw_super
hooks. If a filesystem implements these hooks, they are called instead of
the vfs freeze_super and thaw_super functions. This means that every
filesystem that implements these hooks must call the vfs freeze_super and
thaw_super functions itself within the hook function to make use of the vfs
freezing code.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2014-11-14 10:42:03 +08:00
|
|
|
if (sb->s_op->freeze_fs == NULL && sb->s_op->freeze_super == NULL)
|
2009-01-10 08:40:59 +08:00
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
/* Freeze */
|
fs: add freeze_super/thaw_super fs hooks
Currently, freezing a filesystem involves calling freeze_super, which locks
sb->s_umount and then calls the fs-specific freeze_fs hook. This makes it
hard for gfs2 (and potentially other cluster filesystems) to use the vfs
freezing code to do freezes on all the cluster nodes.
In order to communicate that a freeze has been requested, and to make sure
that only one node is trying to freeze at a time, gfs2 uses a glock
(sd_freeze_gl). The problem is that there is no hook for gfs2 to acquire
this lock before calling freeze_super. This means that two nodes can
attempt to freeze the filesystem by both calling freeze_super, acquiring
the sb->s_umount lock, and then attempting to grab the cluster glock
sd_freeze_gl. Only one will succeed, and the other will be stuck in
freeze_super, making it impossible to finish freezing the node.
To solve this problem, this patch adds the freeze_super and thaw_super
hooks. If a filesystem implements these hooks, they are called instead of
the vfs freeze_super and thaw_super functions. This means that every
filesystem that implements these hooks must call the vfs freeze_super and
thaw_super functions itself within the hook function to make use of the vfs
freezing code.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2014-11-14 10:42:03 +08:00
|
|
|
if (sb->s_op->freeze_super)
|
|
|
|
return sb->s_op->freeze_super(sb);
|
2010-03-23 22:34:56 +08:00
|
|
|
return freeze_super(sb);
|
2009-01-10 08:40:59 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int ioctl_fsthaw(struct file *filp)
|
|
|
|
{
|
2013-01-24 06:07:38 +08:00
|
|
|
struct super_block *sb = file_inode(filp)->i_sb;
|
2009-01-10 08:40:59 +08:00
|
|
|
|
2015-02-16 04:35:35 +08:00
|
|
|
if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
|
2009-01-10 08:40:59 +08:00
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
/* Thaw */
|
fs: add freeze_super/thaw_super fs hooks
Currently, freezing a filesystem involves calling freeze_super, which locks
sb->s_umount and then calls the fs-specific freeze_fs hook. This makes it
hard for gfs2 (and potentially other cluster filesystems) to use the vfs
freezing code to do freezes on all the cluster nodes.
In order to communicate that a freeze has been requested, and to make sure
that only one node is trying to freeze at a time, gfs2 uses a glock
(sd_freeze_gl). The problem is that there is no hook for gfs2 to acquire
this lock before calling freeze_super. This means that two nodes can
attempt to freeze the filesystem by both calling freeze_super, acquiring
the sb->s_umount lock, and then attempting to grab the cluster glock
sd_freeze_gl. Only one will succeed, and the other will be stuck in
freeze_super, making it impossible to finish freezing the node.
To solve this problem, this patch adds the freeze_super and thaw_super
hooks. If a filesystem implements these hooks, they are called instead of
the vfs freeze_super and thaw_super functions. This means that every
filesystem that implements these hooks must call the vfs freeze_super and
thaw_super functions itself within the hook function to make use of the vfs
freezing code.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2014-11-14 10:42:03 +08:00
|
|
|
if (sb->s_op->thaw_super)
|
|
|
|
return sb->s_op->thaw_super(sb);
|
2010-03-23 22:34:56 +08:00
|
|
|
return thaw_super(sb);
|
2009-01-10 08:40:59 +08:00
|
|
|
}
|
|
|
|
|
2019-04-22 06:45:28 +08:00
|
|
|
static int ioctl_file_dedupe_range(struct file *file,
|
|
|
|
struct file_dedupe_range __user *argp)
|
2015-12-19 16:55:59 +08:00
|
|
|
{
|
|
|
|
struct file_dedupe_range *same = NULL;
|
|
|
|
int ret;
|
|
|
|
unsigned long size;
|
|
|
|
u16 count;
|
|
|
|
|
|
|
|
if (get_user(count, &argp->dest_count)) {
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
size = offsetof(struct file_dedupe_range __user, info[count]);
|
2016-09-15 11:20:44 +08:00
|
|
|
if (size > PAGE_SIZE) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
2015-12-19 16:55:59 +08:00
|
|
|
|
|
|
|
same = memdup_user(argp, size);
|
|
|
|
if (IS_ERR(same)) {
|
|
|
|
ret = PTR_ERR(same);
|
|
|
|
same = NULL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2016-07-28 09:11:29 +08:00
|
|
|
same->dest_count = count;
|
2015-12-19 16:55:59 +08:00
|
|
|
ret = vfs_dedupe_file_range(file, same);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = copy_to_user(argp, same, size);
|
|
|
|
if (ret)
|
|
|
|
ret = -EFAULT;
|
|
|
|
|
|
|
|
out:
|
|
|
|
kfree(same);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2008-02-07 16:13:25 +08:00
|
|
|
* do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
|
2005-04-17 06:20:36 +08:00
|
|
|
* It's just a simple helper for sys_ioctl and compat_sys_ioctl.
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
*
|
|
|
|
* When you add any new common ioctls to the switches above and below,
|
|
|
|
* please ensure they have compatible arguments in compat mode.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
static int do_vfs_ioctl(struct file *filp, unsigned int fd,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2019-04-22 06:45:28 +08:00
|
|
|
void __user *argp = (void __user *)arg;
|
2013-01-24 06:07:38 +08:00
|
|
|
struct inode *inode = file_inode(filp);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
switch (cmd) {
|
2008-02-07 16:13:23 +08:00
|
|
|
case FIOCLEX:
|
|
|
|
set_close_on_exec(fd, 1);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-02-07 16:13:23 +08:00
|
|
|
case FIONCLEX:
|
|
|
|
set_close_on_exec(fd, 0);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-02-07 16:13:23 +08:00
|
|
|
case FIONBIO:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return ioctl_fionbio(filp, argp);
|
2008-02-07 16:13:23 +08:00
|
|
|
|
|
|
|
case FIOASYNC:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return ioctl_fioasync(fd, filp, argp);
|
2008-02-07 16:13:23 +08:00
|
|
|
|
|
|
|
case FIOQSIZE:
|
2011-01-16 23:48:17 +08:00
|
|
|
if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) ||
|
|
|
|
S_ISLNK(inode->i_mode)) {
|
|
|
|
loff_t res = inode_get_bytes(inode);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return copy_to_user(argp, &res, sizeof(res)) ?
|
|
|
|
-EFAULT : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return -ENOTTY;
|
2009-01-10 08:40:59 +08:00
|
|
|
|
|
|
|
case FIFREEZE:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return ioctl_fsfreeze(filp);
|
2009-01-10 08:40:59 +08:00
|
|
|
|
|
|
|
case FITHAW:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return ioctl_fsthaw(filp);
|
2009-01-10 08:40:59 +08:00
|
|
|
|
2009-05-14 06:12:05 +08:00
|
|
|
case FS_IOC_FIEMAP:
|
2019-04-22 06:45:28 +08:00
|
|
|
return ioctl_fiemap(filp, argp);
|
2009-05-14 06:12:05 +08:00
|
|
|
|
|
|
|
case FIGETBSZ:
|
2018-10-11 22:38:14 +08:00
|
|
|
/* anon_bdev filesystems may not have a block size */
|
|
|
|
if (!inode->i_sb->s_blocksize)
|
|
|
|
return -EINVAL;
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
|
2019-04-22 06:45:28 +08:00
|
|
|
return put_user(inode->i_sb->s_blocksize, (int __user *)argp);
|
2009-05-14 06:12:05 +08:00
|
|
|
|
2015-12-03 19:59:50 +08:00
|
|
|
case FICLONE:
|
|
|
|
return ioctl_file_clone(filp, arg, 0, 0, 0);
|
|
|
|
|
|
|
|
case FICLONERANGE:
|
|
|
|
return ioctl_file_clone_range(filp, argp);
|
|
|
|
|
2015-12-19 16:55:59 +08:00
|
|
|
case FIDEDUPERANGE:
|
|
|
|
return ioctl_file_dedupe_range(filp, argp);
|
|
|
|
|
2020-02-08 00:55:48 +08:00
|
|
|
case FIONREAD:
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
|
|
return vfs_ioctl(filp, cmd, arg);
|
|
|
|
|
|
|
|
return put_user(i_size_read(inode) - filp->f_pos,
|
|
|
|
(int __user *)argp);
|
|
|
|
|
2008-02-07 16:13:23 +08:00
|
|
|
default:
|
2011-01-16 23:48:17 +08:00
|
|
|
if (S_ISREG(inode->i_mode))
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return file_ioctl(filp, cmd, argp);
|
2008-02-07 16:13:23 +08:00
|
|
|
break;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
|
|
|
|
return -ENOIOCTLCMD;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2018-03-14 04:43:59 +08:00
|
|
|
int ksys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2012-08-29 00:52:22 +08:00
|
|
|
struct fd f = fdget(fd);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
int error;
|
2012-08-29 00:52:22 +08:00
|
|
|
|
|
|
|
if (!f.file)
|
|
|
|
return -EBADF;
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
|
2012-08-29 00:52:22 +08:00
|
|
|
error = security_file_ioctl(f.file, cmd, arg);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
if (error)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error = do_vfs_ioctl(f.file, fd, cmd, arg);
|
|
|
|
if (error == -ENOIOCTLCMD)
|
|
|
|
error = vfs_ioctl(f.file, cmd, arg);
|
|
|
|
|
|
|
|
out:
|
2012-08-29 00:52:22 +08:00
|
|
|
fdput(f);
|
2005-04-17 06:20:36 +08:00
|
|
|
return error;
|
|
|
|
}
|
2018-03-14 04:43:59 +08:00
|
|
|
|
|
|
|
SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
|
|
|
|
{
|
|
|
|
return ksys_ioctl(fd, cmd, arg);
|
|
|
|
}
|
2018-09-11 22:55:03 +08:00
|
|
|
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
/**
|
|
|
|
* compat_ptr_ioctl - generic implementation of .compat_ioctl file operation
|
|
|
|
*
|
|
|
|
* This is not normally called as a function, but instead set in struct
|
|
|
|
* file_operations as
|
|
|
|
*
|
|
|
|
* .compat_ioctl = compat_ptr_ioctl,
|
|
|
|
*
|
|
|
|
* On most architectures, the compat_ptr_ioctl() just passes all arguments
|
|
|
|
* to the corresponding ->ioctl handler. The exception is arch/s390, where
|
|
|
|
* compat_ptr() clears the top bit of a 32-bit pointer value, so user space
|
|
|
|
* pointers to the second 2GB alias the first 2GB, as is the case for
|
|
|
|
* native 32-bit s390 user space.
|
|
|
|
*
|
|
|
|
* The compat_ptr_ioctl() function must therefore be used only with ioctl
|
|
|
|
* functions that either ignore the argument or pass a pointer to a
|
|
|
|
* compatible data type.
|
|
|
|
*
|
|
|
|
* If any ioctl command handled by fops->unlocked_ioctl passes a plain
|
|
|
|
* integer instead of a pointer, or any of the passed data types
|
|
|
|
* is incompatible between 32-bit and 64-bit architectures, a proper
|
|
|
|
* handler is required instead of compat_ptr_ioctl.
|
|
|
|
*/
|
|
|
|
long compat_ptr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
if (!file->f_op->unlocked_ioctl)
|
|
|
|
return -ENOIOCTLCMD;
|
|
|
|
|
|
|
|
return file->f_op->unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(compat_ptr_ioctl);
|
2019-06-07 16:06:42 +08:00
|
|
|
|
|
|
|
COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
compat_ulong_t, arg)
|
2019-06-07 16:06:42 +08:00
|
|
|
{
|
|
|
|
struct fd f = fdget(fd);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
int error;
|
|
|
|
|
2019-06-07 16:06:42 +08:00
|
|
|
if (!f.file)
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
return -EBADF;
|
2019-06-07 16:06:42 +08:00
|
|
|
|
|
|
|
/* RED-PEN how should LSM module know it's handling 32bit? */
|
|
|
|
error = security_file_ioctl(f.file, cmd, arg);
|
|
|
|
if (error)
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
goto out;
|
2019-06-07 16:06:42 +08:00
|
|
|
|
|
|
|
switch (cmd) {
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
/* FICLONE takes an int argument, so don't use compat_ptr() */
|
2019-06-07 16:06:42 +08:00
|
|
|
case FICLONE:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
error = ioctl_file_clone(f.file, arg, 0, 0, 0);
|
|
|
|
break;
|
|
|
|
|
2019-06-07 16:06:42 +08:00
|
|
|
#if defined(CONFIG_X86_64)
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
/* these get messy on amd64 due to alignment differences */
|
2019-06-07 16:06:42 +08:00
|
|
|
case FS_IOC_RESVSP_32:
|
|
|
|
case FS_IOC_RESVSP64_32:
|
|
|
|
error = compat_ioctl_preallocate(f.file, 0, compat_ptr(arg));
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
break;
|
2019-06-07 16:06:42 +08:00
|
|
|
case FS_IOC_UNRESVSP_32:
|
|
|
|
case FS_IOC_UNRESVSP64_32:
|
|
|
|
error = compat_ioctl_preallocate(f.file, FALLOC_FL_PUNCH_HOLE,
|
|
|
|
compat_ptr(arg));
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
break;
|
2019-06-07 16:06:42 +08:00
|
|
|
case FS_IOC_ZERO_RANGE_32:
|
|
|
|
error = compat_ioctl_preallocate(f.file, FALLOC_FL_ZERO_RANGE,
|
|
|
|
compat_ptr(arg));
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
break;
|
2019-06-07 16:06:42 +08:00
|
|
|
#endif
|
|
|
|
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
/*
|
|
|
|
* everything else in do_vfs_ioctl() takes either a compatible
|
|
|
|
* pointer argument or no argument -- call it with a modified
|
|
|
|
* argument.
|
|
|
|
*/
|
2019-06-07 16:06:42 +08:00
|
|
|
default:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
error = do_vfs_ioctl(f.file, fd, cmd,
|
|
|
|
(unsigned long)compat_ptr(arg));
|
|
|
|
if (error != -ENOIOCTLCMD)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (f.file->f_op->compat_ioctl)
|
2019-06-07 16:06:42 +08:00
|
|
|
error = f.file->f_op->compat_ioctl(f.file, cmd, arg);
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
if (error == -ENOIOCTLCMD)
|
|
|
|
error = -ENOTTY;
|
|
|
|
break;
|
2019-06-07 16:06:42 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
compat_ioctl: simplify the implementation
Now that both native and compat ioctl syscalls are
in the same file, a couple of simplifications can
be made, bringing the implementation closer together:
- do_vfs_ioctl(), ioctl_preallocate(), and compat_ioctl_preallocate()
can become static, allowing the compiler to optimize better
- slightly update the coding style for consistency between
the functions.
- rather than listing each command in two switch statements
for the compat case, just call a single function that has
all the common commands.
As a side-effect, FS_IOC_RESVSP/FS_IOC_RESVSP64 are now available
to x86 compat tasks, along with FS_IOC_RESVSP_32/FS_IOC_RESVSP64_32.
This is harmless for i386 emulation, and can be considered a bugfix
for x32 emulation, which never supported these in the past.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-11-28 04:25:36 +08:00
|
|
|
fdput(f);
|
|
|
|
|
2019-06-07 16:06:42 +08:00
|
|
|
return error;
|
|
|
|
}
|
2018-09-11 22:55:03 +08:00
|
|
|
#endif
|