Release 4.18 fs/xfs/xfs_file.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_da_format.h"
#include "xfs_da_btree.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_inode_item.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "xfs_error.h"
#include "xfs_dir2.h"
#include "xfs_dir2_priv.h"
#include "xfs_ioctl.h"
#include "xfs_trace.h"
#include "xfs_log.h"
#include "xfs_icache.h"
#include "xfs_pnfs.h"
#include "xfs_iomap.h"
#include "xfs_reflink.h"

#include <linux/dcache.h>
#include <linux/falloc.h>
#include <linux/pagevec.h>
#include <linux/backing-dev.h>
#include <linux/mman.h>


static const struct vm_operations_struct xfs_file_vm_ops;


int

xfs_update_prealloc_flags(
	struct xfs_inode	*ip,
	enum xfs_prealloc_flags	flags)
{
	struct xfs_trans	*tp;
	int			error;

	error = xfs_trans_alloc(ip->i_mount, &M_RES(ip->i_mount)->tr_writeid,
			0, 0, 0, &tp);
	if (error)
		return error;

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);

	if (!(flags & XFS_PREALLOC_INVISIBLE)) {
		VFS_I(ip)->i_mode &= ~S_ISUID;
		if (VFS_I(ip)->i_mode & S_IXGRP)
			VFS_I(ip)->i_mode &= ~S_ISGID;
		xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
	}

	if (flags & XFS_PREALLOC_SET)
		ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
	if (flags & XFS_PREALLOC_CLEAR)
		ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;

	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
	if (flags & XFS_PREALLOC_SYNC)
		xfs_trans_set_sync(tp);
	return xfs_trans_commit(tp);
}

Contributors
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Christoph Hellwig
169
93.37%
2
66.67%
Dave Chinner
12
6.63%
1
33.33%
Total
181
100.00%
3
100.00%

/*
 * Fsync operations on directories are much simpler than on regular files,
 * as there is no file data to flush, and thus also no need for explicit
 * cache flush operations, and there are no non-transaction metadata updates
 * on directories either.
 */

STATIC int

xfs_dir_fsync(
	struct file		*file,
	loff_t			start,
	loff_t			end,
	int			datasync)
{
	struct xfs_inode	*ip = XFS_I(file->f_mapping->host);
	struct xfs_mount	*mp = ip->i_mount;
	xfs_lsn_t		lsn = 0;

	trace_xfs_dir_fsync(ip);

	xfs_ilock(ip, XFS_ILOCK_SHARED);
	if (xfs_ipincount(ip))
		lsn = ip->i_itemp->ili_last_lsn;
	xfs_iunlock(ip, XFS_ILOCK_SHARED);

	if (!lsn)
		return 0;
	return xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
}

Contributors
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CommitProp
Christoph Hellwig
102
100.00%
2
100.00%
Total
102
100.00%
2
100.00%


STATIC int

xfs_file_fsync(
	struct file		*file,
	loff_t			start,
	loff_t			end,
	int			datasync)
{
	struct inode		*inode = file->f_mapping->host;
	struct xfs_inode	*ip = XFS_I(inode);
	struct xfs_mount	*mp = ip->i_mount;
	int			error = 0;
	int			log_flushed = 0;
	xfs_lsn_t		lsn = 0;

	trace_xfs_file_fsync(ip);

	error = file_write_and_wait_range(file, start, end);
	if (error)
		return error;

	if (XFS_FORCED_SHUTDOWN(mp))
		return -EIO;

	xfs_iflags_clear(ip, XFS_ITRUNCATED);

	/*
         * If we have an RT and/or log subvolume we need to make sure to flush
         * the write cache the device used for file data first.  This is to
         * ensure newly written file data make it to disk before logging the new
         * inode size in case of an extending write.
         */
	if (XFS_IS_REALTIME_INODE(ip))
		xfs_blkdev_issue_flush(mp->m_rtdev_targp);
	else if (mp->m_logdev_targp != mp->m_ddev_targp)
		xfs_blkdev_issue_flush(mp->m_ddev_targp);

	/*
         * All metadata updates are logged, which means that we just have to
         * flush the log up to the latest LSN that touched the inode. If we have
         * concurrent fsync/fdatasync() calls, we need them to all block on the
         * log force before we clear the ili_fsync_fields field. This ensures
         * that we don't get a racing sync operation that does not wait for the
         * metadata to hit the journal before returning. If we race with
         * clearing the ili_fsync_fields, then all that will happen is the log
         * force will do nothing as the lsn will already be on disk. We can't
         * race with setting ili_fsync_fields because that is done under
         * XFS_ILOCK_EXCL, and that can't happen because we hold the lock shared
         * until after the ili_fsync_fields is cleared.
         */
	xfs_ilock(ip, XFS_ILOCK_SHARED);
	if (xfs_ipincount(ip)) {
		if (!datasync ||
		    (ip->i_itemp->ili_fsync_fields & ~XFS_ILOG_TIMESTAMP))
			lsn = ip->i_itemp->ili_last_lsn;
	}

	if (lsn) {
		error = xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, &log_flushed);
		ip->i_itemp->ili_fsync_fields = 0;
	}
	xfs_iunlock(ip, XFS_ILOCK_SHARED);

	/*
         * If we only have a single device, and the log force about was
         * a no-op we might have to flush the data device cache here.
         * This can only happen for fdatasync/O_DSYNC if we were overwriting
         * an already allocated file and thus do not have any metadata to
         * commit.
         */
	if (!log_flushed && !XFS_IS_REALTIME_INODE(ip) &&
	    mp->m_logdev_targp == mp->m_ddev_targp)
		xfs_blkdev_issue_flush(mp->m_ddev_targp);

	return error;
}

Contributors
Person
Tokens
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Commits
CommitProp
Christoph Hellwig
193
78.78%
7
63.64%
Dave Chinner
28
11.43%
2
18.18%
Josef Bacik
22
8.98%
1
9.09%
Jeff Layton
2
0.82%
1
9.09%
Total
245
100.00%
11
100.00%


STATIC ssize_t

xfs_file_dio_aio_read(
	struct kiocb		*iocb,
	struct iov_iter		*to)
{
	struct xfs_inode	*ip = XFS_I(file_inode(iocb->ki_filp));
	size_t			count = iov_iter_count(to);
	ssize_t			ret;

	trace_xfs_file_direct_read(ip, count, iocb->ki_pos);

	if (!count)
		return 0; /* skip atime */

	file_accessed(iocb->ki_filp);

	xfs_ilock(ip, XFS_IOLOCK_SHARED);
	ret = iomap_dio_rw(iocb, to, &xfs_iomap_ops, NULL);
	xfs_iunlock(ip, XFS_IOLOCK_SHARED);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
82
82.00%
10
62.50%
Al Viro
8
8.00%
2
12.50%
Dave Chinner
7
7.00%
2
12.50%
Chris Mason
2
2.00%
1
6.25%
Bill O'Donnell
1
1.00%
1
6.25%
Total
100
100.00%
16
100.00%


static noinline ssize_t

xfs_file_dax_read(
	struct kiocb		*iocb,
	struct iov_iter		*to)
{
	struct xfs_inode	*ip = XFS_I(iocb->ki_filp->f_mapping->host);
	size_t			count = iov_iter_count(to);
	ssize_t			ret = 0;

	trace_xfs_file_dax_read(ip, count, iocb->ki_pos);

	if (!count)
		return 0; /* skip atime */

	if (iocb->ki_flags & IOCB_NOWAIT) {
		if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED))
			return -EAGAIN;
	} else {
		xfs_ilock(ip, XFS_IOLOCK_SHARED);
	}

	ret = dax_iomap_rw(iocb, to, &xfs_iomap_ops);
	xfs_iunlock(ip, XFS_IOLOCK_SHARED);

	file_accessed(iocb->ki_filp);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
98
75.97%
9
60.00%
Goldwyn Rodrigues
15
11.63%
1
6.67%
Dave Chinner
10
7.75%
2
13.33%
Bill O'Donnell
3
2.33%
1
6.67%
Arnd Bergmann
2
1.55%
1
6.67%
Ross Zwisler
1
0.78%
1
6.67%
Total
129
100.00%
15
100.00%


STATIC ssize_t

xfs_file_buffered_aio_read(
	struct kiocb		*iocb,
	struct iov_iter		*to)
{
	struct xfs_inode	*ip = XFS_I(file_inode(iocb->ki_filp));
	ssize_t			ret;

	trace_xfs_file_buffered_read(ip, iov_iter_count(to), iocb->ki_pos);

	if (iocb->ki_flags & IOCB_NOWAIT) {
		if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED))
			return -EAGAIN;
	} else {
		xfs_ilock(ip, XFS_IOLOCK_SHARED);
	}
	ret = generic_file_read_iter(iocb, to);
	xfs_iunlock(ip, XFS_IOLOCK_SHARED);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
96
95.05%
7
70.00%
Al Viro
2
1.98%
1
10.00%
Dave Chinner
2
1.98%
1
10.00%
Brian Foster
1
0.99%
1
10.00%
Total
101
100.00%
10
100.00%


STATIC ssize_t

xfs_file_read_iter(
	struct kiocb		*iocb,
	struct iov_iter		*to)
{
	struct inode		*inode = file_inode(iocb->ki_filp);
	struct xfs_mount	*mp = XFS_I(inode)->i_mount;
	ssize_t			ret = 0;

	XFS_STATS_INC(mp, xs_read_calls);

	if (XFS_FORCED_SHUTDOWN(mp))
		return -EIO;

	if (IS_DAX(inode))
		ret = xfs_file_dax_read(iocb, to);
	else if (iocb->ki_flags & IOCB_DIRECT)
		ret = xfs_file_dio_aio_read(iocb, to);
	else
		ret = xfs_file_buffered_aio_read(iocb, to);

	if (ret > 0)
		XFS_STATS_ADD(mp, xs_read_bytes, ret);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
114
91.20%
4
50.00%
Dave Chinner
5
4.00%
2
25.00%
Al Viro
4
3.20%
1
12.50%
Bill O'Donnell
2
1.60%
1
12.50%
Total
125
100.00%
8
100.00%

/*
 * Common pre-write limit and setup checks.
 *
 * Called with the iolocked held either shared and exclusive according to
 * @iolock, and returns with it held.  Might upgrade the iolock to exclusive
 * if called for a direct write beyond i_size.
 */

STATIC ssize_t

xfs_file_aio_write_checks(
	struct kiocb		*iocb,
	struct iov_iter		*from,
	int			*iolock)
{
	struct file		*file = iocb->ki_filp;
	struct inode		*inode = file->f_mapping->host;
	struct xfs_inode	*ip = XFS_I(inode);
	ssize_t			error = 0;
	size_t			count = iov_iter_count(from);
	bool			drained_dio = false;
	loff_t			isize;

restart:
	error = generic_write_checks(iocb, from);
	if (error <= 0)
		return error;

	error = xfs_break_layouts(inode, iolock, BREAK_WRITE);
	if (error)
		return error;

	/*
         * For changing security info in file_remove_privs() we need i_rwsem
         * exclusively.
         */
	if (*iolock == XFS_IOLOCK_SHARED && !IS_NOSEC(inode)) {
		xfs_iunlock(ip, *iolock);
		*iolock = XFS_IOLOCK_EXCL;
		xfs_ilock(ip, *iolock);
		goto restart;
	}
	/*
         * If the offset is beyond the size of the file, we need to zero any
         * blocks that fall between the existing EOF and the start of this
         * write.  If zeroing is needed and we are currently holding the
         * iolock shared, we need to update it to exclusive which implies
         * having to redo all checks before.
         *
         * We need to serialise against EOF updates that occur in IO
         * completions here. We want to make sure that nobody is changing the
         * size while we do this check until we have placed an IO barrier (i.e.
         * hold the XFS_IOLOCK_EXCL) that prevents new IO from being dispatched.
         * The spinlock effectively forms a memory barrier once we have the
         * XFS_IOLOCK_EXCL so we are guaranteed to see the latest EOF value
         * and hence be able to correctly determine if we need to run zeroing.
         */
	spin_lock(&ip->i_flags_lock);
	isize = i_size_read(inode);
	if (iocb->ki_pos > isize) {
		spin_unlock(&ip->i_flags_lock);
		if (!drained_dio) {
			if (*iolock == XFS_IOLOCK_SHARED) {
				xfs_iunlock(ip, *iolock);
				*iolock = XFS_IOLOCK_EXCL;
				xfs_ilock(ip, *iolock);
				iov_iter_reexpand(from, count);
			}
			/*
                         * We now have an IO submission barrier in place, but
                         * AIO can do EOF updates during IO completion and hence
                         * we now need to wait for all of them to drain. Non-AIO
                         * DIO will have drained before we are given the
                         * XFS_IOLOCK_EXCL, and so for most cases this wait is a
                         * no-op.
                         */
			inode_dio_wait(inode);
			drained_dio = true;
			goto restart;
		}
	
		trace_xfs_zero_eof(ip, isize, iocb->ki_pos - isize);
		error = iomap_zero_range(inode, isize, iocb->ki_pos - isize,
				NULL, &xfs_iomap_ops);
		if (error)
			return error;
	} else
		spin_unlock(&ip->i_flags_lock);

	/*
         * Updating the timestamps will grab the ilock again from
         * xfs_fs_dirty_inode, so we have to call it after dropping the
         * lock above.  Eventually we should look into a way to avoid
         * the pointless lock roundtrip.
         */
	if (likely(!(file->f_mode & FMODE_NOCMTIME))) {
		error = file_update_time(file);
		if (error)
			return error;
	}

	/*
         * If we're writing the file then make sure to clear the setuid and
         * setgid bits if the process is not being run by root.  This keeps
         * people from modifying setuid and setgid binaries.
         */
	if (!IS_NOSEC(inode))
		return file_remove_privs(file);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
147
43.49%
8
40.00%
Dave Chinner
86
25.44%
3
15.00%
Al Viro
35
10.36%
2
10.00%
Jan Kara
33
9.76%
2
10.00%
David Chinner
20
5.92%
1
5.00%
Brian Foster
12
3.55%
1
5.00%
Josef Bacik
2
0.59%
1
5.00%
Dan J Williams
2
0.59%
1
5.00%
Eryu Guan
1
0.30%
1
5.00%
Total
338
100.00%
20
100.00%


static int

xfs_dio_write_end_io(
	struct kiocb		*iocb,
	ssize_t			size,
	unsigned		flags)
{
	struct inode		*inode = file_inode(iocb->ki_filp);
	struct xfs_inode	*ip = XFS_I(inode);
	loff_t			offset = iocb->ki_pos;
	int			error = 0;

	trace_xfs_end_io_direct_write(ip, offset, size);

	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
		return -EIO;

	if (size <= 0)
		return size;

	/*
         * Capture amount written on completion as we can't reliably account
         * for it on submission.
         */
	XFS_STATS_ADD(ip->i_mount, xs_write_bytes, size);

	if (flags & IOMAP_DIO_COW) {
		error = xfs_reflink_end_cow(ip, offset, size);
		if (error)
			return error;
	}

	/*
         * Unwritten conversion updates the in-core isize after extent
         * conversion but before updating the on-disk size. Updating isize any
         * earlier allows a racing dio read to find unwritten extents before
         * they are converted.
         */
	if (flags & IOMAP_DIO_UNWRITTEN)
		return xfs_iomap_write_unwritten(ip, offset, size, true);

	/*
         * We need to update the in-core inode size here so that we don't end up
         * with the on-disk inode size being outside the in-core inode size. We
         * have no other method of updating EOF for AIO, so always do it here
         * if necessary.
         *
         * We need to lock the test/set EOF update as we can be racing with
         * other IO completions here to update the EOF. Failing to serialise
         * here can result in EOF moving backwards and Bad Things Happen when
         * that occurs.
         */
	spin_lock(&ip->i_flags_lock);
	if (offset + size > i_size_read(inode)) {
		i_size_write(inode, offset + size);
		spin_unlock(&ip->i_flags_lock);
		error = xfs_setfilesize(ip, offset, size);
	} else {
		spin_unlock(&ip->i_flags_lock);
	}

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
140
68.97%
1
33.33%
Eryu Guan
51
25.12%
1
33.33%
Dave Chinner
12
5.91%
1
33.33%
Total
203
100.00%
3
100.00%

/*
 * xfs_file_dio_aio_write - handle direct IO writes
 *
 * Lock the inode appropriately to prepare for and issue a direct IO write.
 * By separating it from the buffered write path we remove all the tricky to
 * follow locking changes and looping.
 *
 * If there are cached pages or we're extending the file, we need IOLOCK_EXCL
 * until we're sure the bytes at the new EOF have been zeroed and/or the cached
 * pages are flushed out.
 *
 * In most cases the direct IO writes will be done holding IOLOCK_SHARED
 * allowing them to be done in parallel with reads and other direct IO writes.
 * However, if the IO is not aligned to filesystem blocks, the direct IO layer
 * needs to do sub-block zeroing and that requires serialisation against other
 * direct IOs to the same block. In this case we need to serialise the
 * submission of the unaligned IOs so that we don't get racing block zeroing in
 * the dio layer.  To avoid the problem with aio, we also need to wait for
 * outstanding IOs to complete so that unwritten extent conversion is completed
 * before we try to map the overlapping block. This is currently implemented by
 * hitting it with a big hammer (i.e. inode_dio_wait()).
 *
 * Returns with locks held indicated by @iolock and errors indicated by
 * negative return values.
 */

STATIC ssize_t

xfs_file_dio_aio_write(
	struct kiocb		*iocb,
	struct iov_iter		*from)
{
	struct file		*file = iocb->ki_filp;
	struct address_space	*mapping = file->f_mapping;
	struct inode		*inode = mapping->host;
	struct xfs_inode	*ip = XFS_I(inode);
	struct xfs_mount	*mp = ip->i_mount;
	ssize_t			ret = 0;
	int			unaligned_io = 0;
	int			iolock;
	size_t			count = iov_iter_count(from);
	struct xfs_buftarg      *target = XFS_IS_REALTIME_INODE(ip) ?
					mp->m_rtdev_targp : mp->m_ddev_targp;

	/* DIO must be aligned to device logical sector size */
	if ((iocb->ki_pos | count) & target->bt_logical_sectormask)
		return -EINVAL;

	/*
         * Don't take the exclusive iolock here unless the I/O is unaligned to
         * the file system block size.  We don't need to consider the EOF
         * extension case here because xfs_file_aio_write_checks() will relock
         * the inode as necessary for EOF zeroing cases and fill out the new
         * inode size as appropriate.
         */
	if ((iocb->ki_pos & mp->m_blockmask) ||
	    ((iocb->ki_pos + count) & mp->m_blockmask)) {
		unaligned_io = 1;

		/*
                 * We can't properly handle unaligned direct I/O to reflink
                 * files yet, as we can't unshare a partial block.
                 */
		if (xfs_is_reflink_inode(ip)) {
			trace_xfs_reflink_bounce_dio_write(ip, iocb->ki_pos, count);
			return -EREMCHG;
		}
		iolock = XFS_IOLOCK_EXCL;
	} else {
		iolock = XFS_IOLOCK_SHARED;
	}

	if (iocb->ki_flags & IOCB_NOWAIT) {
		if (!xfs_ilock_nowait(ip, iolock))
			return -EAGAIN;
	} else {
		xfs_ilock(ip, iolock);
	}

	ret = xfs_file_aio_write_checks(iocb, from, &iolock);
	if (ret)
		goto out;
	count = iov_iter_count(from);

	/*
         * If we are doing unaligned IO, wait for all other IO to drain,
         * otherwise demote the lock if we had to take the exclusive lock
         * for other reasons in xfs_file_aio_write_checks.
         */
	if (unaligned_io) {
		/* If we are going to wait for other DIO to finish, bail */
		if (iocb->ki_flags & IOCB_NOWAIT) {
			if (atomic_read(&inode->i_dio_count))
				return -EAGAIN;
		} else {
			inode_dio_wait(inode);
		}
	} else if (iolock == XFS_IOLOCK_EXCL) {
		xfs_ilock_demote(ip, XFS_IOLOCK_EXCL);
		iolock = XFS_IOLOCK_SHARED;
	}

	trace_xfs_file_direct_write(ip, count, iocb->ki_pos);
	ret = iomap_dio_rw(iocb, from, &xfs_iomap_ops, xfs_dio_write_end_io);
out:
	xfs_iunlock(ip, iolock);

	/*
         * No fallback to buffered IO on errors for XFS, direct IO will either
         * complete fully or fail.
         */
	ASSERT(ret < 0 || ret == count);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
153
42.74%
7
23.33%
Christoph Hellwig
88
24.58%
14
46.67%
Goldwyn Rodrigues
45
12.57%
1
3.33%
Al Viro
35
9.78%
3
10.00%
David Chinner
24
6.70%
1
3.33%
Jan Kara
6
1.68%
1
3.33%
Eric Sandeen
4
1.12%
2
6.67%
Brian Foster
3
0.84%
1
3.33%
Total
358
100.00%
30
100.00%


static noinline ssize_t

xfs_file_dax_write(
	struct kiocb		*iocb,
	struct iov_iter		*from)
{
	struct inode		*inode = iocb->ki_filp->f_mapping->host;
	struct xfs_inode	*ip = XFS_I(inode);
	int			iolock = XFS_IOLOCK_EXCL;
	ssize_t			ret, error = 0;
	size_t			count;
	loff_t			pos;

	if (iocb->ki_flags & IOCB_NOWAIT) {
		if (!xfs_ilock_nowait(ip, iolock))
			return -EAGAIN;
	} else {
		xfs_ilock(ip, iolock);
	}

	ret = xfs_file_aio_write_checks(iocb, from, &iolock);
	if (ret)
		goto out;

	pos = iocb->ki_pos;
	count = iov_iter_count(from);

	trace_xfs_file_dax_write(ip, count, pos);
	ret = dax_iomap_rw(iocb, from, &xfs_iomap_ops);
	if (ret > 0 && iocb->ki_pos > i_size_read(inode)) {
		i_size_write(inode, iocb->ki_pos);
		error = xfs_setfilesize(ip, pos, ret);
	}
out:
	xfs_iunlock(ip, iolock);
	if (error)
		return error;

	if (ret > 0) {
		XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret);

		/* Handle various SYNC-type writes */
		ret = generic_write_sync(iocb, ret);
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
124
53.91%
6
31.58%
Christoph Hellwig
84
36.52%
8
42.11%
Goldwyn Rodrigues
15
6.52%
1
5.26%
Al Viro
4
1.74%
2
10.53%
Arnd Bergmann
2
0.87%
1
5.26%
Ross Zwisler
1
0.43%
1
5.26%
Total
230
100.00%
19
100.00%


STATIC ssize_t

xfs_file_buffered_aio_write(
	struct kiocb		*iocb,
	struct iov_iter		*from)
{
	struct file		*file = iocb->ki_filp;
	struct address_space	*mapping = file->f_mapping;
	struct inode		*inode = mapping->host;
	struct xfs_inode	*ip = XFS_I(inode);
	ssize_t			ret;
	int			enospc = 0;
	int			iolock;

	if (iocb->ki_flags & IOCB_NOWAIT)
		return -EOPNOTSUPP;

write_retry:
	iolock = XFS_IOLOCK_EXCL;
	xfs_ilock(ip, iolock);

	ret = xfs_file_aio_write_checks(iocb, from, &iolock);
	if (ret)
		goto out;

	/* We can write back this queue in page reclaim */
	current->backing_dev_info = inode_to_bdi(inode);

	trace_xfs_file_buffered_write(ip, iov_iter_count(from), iocb->ki_pos);
	ret = iomap_file_buffered_write(iocb, from, &xfs_iomap_ops);
	if (likely(ret >= 0))
		iocb->ki_pos += ret;

	/*
         * If we hit a space limit, try to free up some lingering preallocated
         * space before returning an error. In the case of ENOSPC, first try to
         * write back all dirty inodes to free up some of the excess reserved
         * metadata space. This reduces the chances that the eofblocks scan
         * waits on dirty mappings. Since xfs_flush_inodes() is serialized, this
         * also behaves as a filter to prevent too many eofblocks scans from
         * running at the same time.
         */
	if (ret == -EDQUOT && !enospc) {
		xfs_iunlock(ip, iolock);
		enospc = xfs_inode_free_quota_eofblocks(ip);
		if (enospc)
			goto write_retry;
		enospc = xfs_inode_free_quota_cowblocks(ip);
		if (enospc)
			goto write_retry;
		iolock = 0;
	} else if (ret == -ENOSPC && !enospc) {
		struct xfs_eofblocks eofb = {0};

		enospc = 1;
		xfs_flush_inodes(ip->i_mount);

		xfs_iunlock(ip, iolock);
		eofb.eof_flags = XFS_EOF_FLAGS_SYNC;
		xfs_icache_free_eofblocks(ip->i_mount, &eofb);
		xfs_icache_free_cowblocks(ip->i_mount, &eofb);
		goto write_retry;
	}

	current->backing_dev_info = NULL;
out:
	if (iolock)
		xfs_iunlock(ip, iolock);

	if (ret > 0) {
		XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret);
		/* Handle various SYNC-type writes */
		ret = generic_write_sync(iocb, ret);
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
161
48.79%
7
36.84%
Brian Foster
90
27.27%
3
15.79%
Dave Chinner
45
13.64%
5
26.32%
Al Viro
20
6.06%
3
15.79%
Darrick J. Wong
14
4.24%
1
5.26%
Total
330
100.00%
19
100.00%


STATIC ssize_t

xfs_file_write_iter(
	struct kiocb		*iocb,
	struct iov_iter		*from)
{
	struct file		*file = iocb->ki_filp;
	struct address_space	*mapping = file->f_mapping;
	struct inode		*inode = mapping->host;
	struct xfs_inode	*ip = XFS_I(inode);
	ssize_t			ret;
	size_t			ocount = iov_iter_count(from);

	XFS_STATS_INC(ip->i_mount, xs_write_calls);

	if (ocount == 0)
		return 0;

	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
		return -EIO;

	if (IS_DAX(inode))
		return xfs_file_dax_write(iocb, from);

	if (iocb->ki_flags & IOCB_DIRECT) {
		/*
                 * Allow a directio write to fall back to a buffered
                 * write *only* in the case that we're doing a reflink
                 * CoW.  In all other directio scenarios we do not
                 * allow an operation to fall back to buffered mode.
                 */
		ret = xfs_file_dio_aio_write(iocb, from);
		if (ret != -EREMCHG)
			return ret;
	}

	return xfs_file_buffered_aio_write(iocb, from);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
107
72.30%
2
22.22%
Christoph Hellwig
15
10.14%
2
22.22%
Al Viro
14
9.46%
3
33.33%
Darrick J. Wong
8
5.41%
1
11.11%
Bill O'Donnell
4
2.70%
1
11.11%
Total
148
100.00%
9
100.00%


static void

xfs_wait_dax_page(
	struct inode		*inode,
	bool			*did_unlock)
{
	struct xfs_inode        *ip = XFS_I(inode);

	*did_unlock = true;
	xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
	schedule();
	xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dan J Williams
47
100.00%
1
100.00%
Total
47
100.00%
1
100.00%


static int

xfs_break_dax_layouts(
	struct inode		*inode,
	uint			iolock,
	bool			*did_unlock)
{
	struct page		*page;

	ASSERT(xfs_isilocked(XFS_I(inode), XFS_MMAPLOCK_EXCL));

	page = dax_layout_busy_page(inode->i_mapping);
	if (!page)
		return 0;

	return ___wait_var_event(&page->_refcount,
			atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE,
			0, 0, xfs_wait_dax_page(inode, did_unlock));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dan J Williams
85
100.00%
1
100.00%
Total
85
100.00%
1
100.00%


int

xfs_break_layouts(
	struct inode		*inode,
	uint			*iolock,
	enum layout_break_reason reason)
{
	bool			retry;
	int			error;

	ASSERT(xfs_isilocked(XFS_I(inode), XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL));

	do {
		retry = false;
		switch (reason) {
		case BREAK_UNMAP:
			error = xfs_break_dax_layouts(inode, *iolock, &retry);
			if (error || retry)
				break;
			/* fall through */
		case BREAK_WRITE:
			error = xfs_break_leased_layouts(inode, iolock, &retry);
			break;
		default:
			WARN_ON_ONCE(1);
			error = -EINVAL;
		}
	} while (error == 0 && retry);

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dan J Williams
115
100.00%
2
100.00%
Total
115
100.00%
2
100.00%


#define	XFS_FALLOC_FL_SUPPORTED						\
		(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |           \
                 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |      \
                 FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE)


STATIC long

xfs_file_fallocate(
	struct file		*file,
	int			mode,
	loff_t			offset,
	loff_t			len)
{
	struct inode		*inode = file_inode(file);
	struct xfs_inode	*ip = XFS_I(inode);
	long			error;
	enum xfs_prealloc_flags	flags = 0;
	uint			iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
	loff_t			new_size = 0;
	bool			do_file_insert = false;

	if (!S_ISREG(inode->i_mode))
		return -EINVAL;
	if (mode & ~XFS_FALLOC_FL_SUPPORTED)
		return -EOPNOTSUPP;

	xfs_ilock(ip, iolock);
	error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
	if (error)
		goto out_unlock;

	if (mode & FALLOC_FL_PUNCH_HOLE) {
		error = xfs_free_file_space(ip, offset, len);
		if (error)
			goto out_unlock;
	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
		unsigned int blksize_mask = i_blocksize(inode) - 1;

		if (offset & blksize_mask || len & blksize_mask) {
			error = -EINVAL;
			goto out_unlock;
		}

		/*
                 * There is no need to overlap collapse range with EOF,
                 * in which case it is effectively a truncate operation
                 */
		if (offset + len >= i_size_read(inode)) {
			error = -EINVAL;
			goto out_unlock;
		}

		new_size = i_size_read(inode) - len;

		error = xfs_collapse_file_space(ip, offset, len);
		if (error)
			goto out_unlock;
	} else if (mode & FALLOC_FL_INSERT_RANGE) {
		unsigned int	blksize_mask = i_blocksize(inode) - 1;
		loff_t		isize = i_size_read(inode);

		if (offset & blksize_mask || len & blksize_mask) {
			error = -EINVAL;
			goto out_unlock;
		}

		/*
                 * New inode size must not exceed ->s_maxbytes, accounting for
                 * possible signed overflow.
                 */
		if (inode->i_sb->s_maxbytes - isize < len) {
			error = -EFBIG;
			goto out_unlock;
		}
		new_size = isize + len;

		/* Offset should be less than i_size */
		if (offset >= isize) {
			error = -EINVAL;
			goto out_unlock;
		}
		do_file_insert = true;
	} else {
		flags |= XFS_PREALLOC_SET;

		if (!(mode & FALLOC_FL_KEEP_SIZE) &&
		    offset + len > i_size_read(inode)) {
			new_size = offset + len;
			error = inode_newsize_ok(inode, new_size);
			if (error)
				goto out_unlock;
		}

		if (mode & FALLOC_FL_ZERO_RANGE)
			error = xfs_zero_file_space(ip, offset, len);
		else {
			if (mode & FALLOC_FL_UNSHARE_RANGE) {
				error = xfs_reflink_unshare(ip, offset, len);
				if (error)
					goto out_unlock;
			}
			error = xfs_alloc_file_space(ip, offset, len,
						     XFS_BMAPI_PREALLOC);
		}
		if (error)
			goto out_unlock;
	}

	if (file->f_flags & O_DSYNC)
		flags |= XFS_PREALLOC_SYNC;

	error = xfs_update_prealloc_flags(ip, flags);
	if (error)
		goto out_unlock;

	/* Change file size if needed */
	if (new_size) {
		struct iattr iattr;

		iattr.ia_valid = ATTR_SIZE;
		iattr.ia_size = new_size;
		error = xfs_vn_setattr_size(file_dentry(file), &iattr);
		if (error)
			goto out_unlock;
	}

	/*
         * Perform hole insertion now that the file size has been
         * updated so that if we crash during the operation we don't
         * leave shifted extents past EOF and hence losing access to
         * the data that is contained within them.
         */
	if (do_file_insert)
		error = xfs_insert_file_space(ip, offset, len);

out_unlock:
	xfs_iunlock(ip, iolock);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
266
48.90%
6
30.00%
Namjae Jeon
175
32.17%
2
10.00%
Darrick J. Wong
44
8.09%
2
10.00%
Lukas Czerner
31
5.70%
2
10.00%
Fabian Frederick
8
1.47%
1
5.00%
Dave Chinner
6
1.10%
2
10.00%
Jan Kara
5
0.92%
1
5.00%
Dan J Williams
4
0.74%
2
10.00%
Al Viro
3
0.55%
1
5.00%
Thomas Meyer
2
0.37%
1
5.00%
Total
544
100.00%
20
100.00%


STATIC int

xfs_file_clone_range(
	struct file	*file_in,
	loff_t		pos_in,
	struct file	*file_out,
	loff_t		pos_out,
	u64		len)
{
	return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out,
				     len, false);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Darrick J. Wong
31
75.61%
2
66.67%
Christoph Hellwig
10
24.39%
1
33.33%
Total
41
100.00%
3
100.00%


STATIC ssize_t

xfs_file_dedupe_range(
	struct file	*src_file,
	u64		loff,
	u64		len,
	struct file	*dst_file,
	u64		dst_loff)
{
	struct inode	*srci = file_inode(src_file);
	u64		max_dedupe;
	int		error;

	/*
         * Since we have to read all these pages in to compare them, cut
         * it off at MAX_RW_COUNT/2 rounded down to the nearest block.
         * That means we won't do more than MAX_RW_COUNT IO per request.
         */
	max_dedupe = (MAX_RW_COUNT >> 1) & ~(i_blocksize(srci) - 1);
	if (len > max_dedupe)
		len = max_dedupe;
	error = xfs_reflink_remap_range(src_file, loff, dst_file, dst_loff,
				     len, true);
	if (error)
		return error;
	return len;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Darrick J. Wong
96
98.97%
3
75.00%
Christoph Hellwig
1
1.03%
1
25.00%
Total
97
100.00%
4
100.00%


STATIC int

xfs_file_open(
	struct inode	*inode,
	struct file	*file)
{
	if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
		return -EFBIG;
	if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb)))
		return -EIO;
	file->f_mode |= FMODE_NOWAIT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
52
82.54%
4
50.00%
Goldwyn Rodrigues
5
7.94%
1
12.50%
Stephen Lord
3
4.76%
1
12.50%
Nathan Scott
3
4.76%
2
25.00%
Total
63
100.00%
8
100.00%


STATIC int

xfs_dir_open(
	struct inode	*inode,
	struct file	*file)
{
	struct xfs_inode *ip = XFS_I(inode);
	int		mode;
	int		error;

	error = xfs_file_open(inode, file);
	if (error)
		return error;

	/*
         * If there are any blocks, read-ahead block 0 as we're almost
         * certain to have the next operation be a read there.
         */
	mode = xfs_ilock_data_map_shared(ip);
	if (ip->i_d.di_nextents > 0)
		error = xfs_dir3_data_readahead(ip, 0, -1);
	xfs_iunlock(ip, mode);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
79
89.77%
4
50.00%
Nathan Scott
3
3.41%
1
12.50%
Dave Chinner
3
3.41%
2
25.00%
Darrick J. Wong
3
3.41%
1
12.50%
Total
88
100.00%
8
100.00%


STATIC int

xfs_file_release(
	struct inode	*inode,
	struct file	*filp)
{
	return xfs_release(XFS_I(inode));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
23
92.00%
2
50.00%
Nathan Scott
2
8.00%
2
50.00%
Total
25
100.00%
4
100.00%


STATIC int

xfs_file_readdir(
	struct file	*file,
	struct dir_context *ctx)
{
	struct inode	*inode = file_inode(file);
	xfs_inode_t	*ip = XFS_I(inode);
	size_t		bufsize;

	/*
         * The Linux API doesn't pass down the total size of the buffer
         * we read into down to the filesystem.  With the filldir concept
         * it's not needed for correct information, but the XFS dir2 leaf
         * code wants an estimate of the buffer size to calculate it's
         * readahead window and size the buffers used for mapping to
         * physical blocks.
         *
         * Try to give it an estimate that's good enough, maybe at some
         * point we can change the ->readdir prototype to include the
         * buffer size.  For now we use the current glibc buffer size.
         */
	bufsize = (size_t)min_t(loff_t, XFS_READDIR_BUFSIZE, ip->i_d.di_size);

	return xfs_readdir(NULL, ip, ctx, bufsize);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
37
53.62%
5
33.33%
David Woodhouse
12
17.39%
1
6.67%
Al Viro
9
13.04%
2
13.33%
Lachlan McIlroy
4
5.80%
1
6.67%
Darrick J. Wong
3
4.35%
2
13.33%
Nathan Scott
2
2.90%
2
13.33%
Fengguang Wu
1
1.45%
1
6.67%
Eric Sandeen
1
1.45%
1
6.67%
Total
69
100.00%
15
100.00%


STATIC loff_t

xfs_file_llseek(
	struct file	*file,
	loff_t		offset,
	int		whence)
{
	struct inode		*inode = file->f_mapping->host;

	if (XFS_FORCED_SHUTDOWN(XFS_I(inode)->i_mount))
		return -EIO;

	switch (whence) {
	default:
		return generic_file_llseek(file, offset, whence);
	case SEEK_HOLE:
		offset = iomap_seek_hole(inode, offset, &xfs_iomap_ops);
		break;
	case SEEK_DATA:
		offset = iomap_seek_data(inode, offset, &xfs_iomap_ops);
		break;
	}

	if (offset < 0)
		return offset;
	return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jie Liu
60
51.72%
4
57.14%
Christoph Hellwig
30
25.86%
1
14.29%
Eric Sandeen
25
21.55%
1
14.29%
Jan Kara
1
0.86%
1
14.29%
Total
116
100.00%
7
100.00%

/*
 * Locking for serialisation of IO during page faults. This results in a lock
 * ordering of:
 *
 * mmap_sem (MM)
 *   sb_start_pagefault(vfs, freeze)
 *     i_mmaplock (XFS - truncate serialisation)
 *       page_lock (MM)
 *         i_lock (XFS - extent map serialisation)
 */

static vm_fault_t

__xfs_filemap_fault(
	struct vm_fault		*vmf,
	enum page_entry_size	pe_size,
	bool			write_fault)
{
	struct inode		*inode = file_inode(vmf->vma->vm_file);
	struct xfs_inode	*ip = XFS_I(inode);
	vm_fault_t		ret;

	trace_xfs_filemap_fault(ip, pe_size, write_fault);

	if (write_fault) {
		sb_start_pagefault(inode->i_sb);
		file_update_time(vmf->vma->vm_file);
	}

	xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
	if (IS_DAX(inode)) {
		pfn_t pfn;

		ret = dax_iomap_fault(vmf, pe_size, &pfn, NULL, &xfs_iomap_ops);
		if (ret & VM_FAULT_NEEDDSYNC)
			ret = dax_finish_sync_fault(vmf, pe_size, pfn);
	} else {
		if (write_fault)
			ret = iomap_page_mkwrite(vmf, &xfs_iomap_ops);
		else
			ret = filemap_fault(vmf);
	}
	xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);

	if (write_fault)
		sb_end_pagefault(inode->i_sb);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
96
53.04%
2
16.67%
Christoph Hellwig
74
40.88%
4
33.33%
Dave Jiang
5
2.76%
2
16.67%
Jan Kara
3
1.66%
2
16.67%
Souptick Joarder
2
1.10%
1
8.33%
Ross Zwisler
1
0.55%
1
8.33%
Total
181
100.00%
12
100.00%


static vm_fault_t

xfs_filemap_fault(
	struct vm_fault		*vmf)
{
	/* DAX can shortcut the normal fault path on write faults! */
	return __xfs_filemap_fault(vmf, PE_SIZE_PTE,
			IS_DAX(file_inode(vmf->vma->vm_file)) &&
			(vmf->flags & FAULT_FLAG_WRITE));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
25
62.50%
3
50.00%
Christoph Hellwig
12
30.00%
1
16.67%
Dave Jiang
2
5.00%
1
16.67%
Souptick Joarder
1
2.50%
1
16.67%
Total
40
100.00%
6
100.00%


static vm_fault_t

xfs_filemap_huge_fault(
	struct vm_fault		*vmf,
	enum page_entry_size	pe_size)
{
	if (!IS_DAX(file_inode(vmf->vma->vm_file)))
		return VM_FAULT_FALLBACK;

	/* DAX can shortcut the normal fault path on write faults! */
	return __xfs_filemap_fault(vmf, pe_size,
			(vmf->flags & FAULT_FLAG_WRITE));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Matthew Wilcox
18
36.00%
1
12.50%
Christoph Hellwig
16
32.00%
1
12.50%
Dave Jiang
11
22.00%
4
50.00%
Dave Chinner
4
8.00%
1
12.50%
Souptick Joarder
1
2.00%
1
12.50%
Total
50
100.00%
8
100.00%


static vm_fault_t

xfs_filemap_page_mkwrite(
	struct vm_fault		*vmf)
{
	return __xfs_filemap_fault(vmf, PE_SIZE_PTE, true);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
13
61.90%
1
25.00%
Matthew Wilcox
6
28.57%
1
25.00%
Souptick Joarder
1
4.76%
1
25.00%
Dave Jiang
1
4.76%
1
25.00%
Total
21
100.00%
4
100.00%

/*
 * pfn_mkwrite was originally intended to ensure we capture time stamp updates
 * on write faults. In reality, it needs to serialise against truncate and
 * prepare memory for writing so handle is as standard write fault.
 */

static vm_fault_t

xfs_filemap_pfn_mkwrite(
	struct vm_fault		*vmf)
{

	return __xfs_filemap_fault(vmf, PE_SIZE_PTE, true);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
9
42.86%
1
16.67%
Ross Zwisler
5
23.81%
2
33.33%
Matthew Wilcox
3
14.29%
1
16.67%
Jan Kara
3
14.29%
1
16.67%
Souptick Joarder
1
4.76%
1
16.67%
Total
21
100.00%
6
100.00%


static const struct vm_operations_struct xfs_file_vm_ops = {
	.fault		= xfs_filemap_fault,
	.huge_fault	= xfs_filemap_huge_fault,
	.map_pages	= filemap_map_pages,
	.page_mkwrite	= xfs_filemap_page_mkwrite,
	.pfn_mkwrite	= xfs_filemap_pfn_mkwrite,
};


STATIC int

xfs_file_mmap(
	struct file	*filp,
	struct vm_area_struct *vma)
{
	/*
         * We don't support synchronous mappings for non-DAX files. At least
         * until someone comes with a sensible use case.
         */
	if (!IS_DAX(file_inode(filp)) && (vma->vm_flags & VM_SYNC))
		return -EOPNOTSUPP;

	file_accessed(filp);
	vma->vm_ops = &xfs_file_vm_ops;
	if (IS_DAX(file_inode(filp)))
		vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Chinner
47
64.38%
3
60.00%
Christoph Hellwig
24
32.88%
1
20.00%
Matthew Wilcox
2
2.74%
1
20.00%
Total
73
100.00%
5
100.00%


const struct file_operations xfs_file_operations = {
	.llseek		= xfs_file_llseek,
	.read_iter	= xfs_file_read_iter,
	.write_iter	= xfs_file_write_iter,
	.splice_read	= generic_file_splice_read,
	.splice_write	= iter_file_splice_write,
	.unlocked_ioctl	= xfs_file_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= xfs_file_compat_ioctl,
#endif
	.mmap		= xfs_file_mmap,
	.mmap_supported_flags = MAP_SYNC,
	.open		= xfs_file_open,
	.release	= xfs_file_release,
	.fsync		= xfs_file_fsync,
	.get_unmapped_area = thp_get_unmapped_area,
	.fallocate	= xfs_file_fallocate,
	.clone_file_range = xfs_file_clone_range,
	.dedupe_file_range = xfs_file_dedupe_range,
};


const struct file_operations xfs_dir_file_operations = {
	.open		= xfs_dir_open,
	.read		= generic_read_dir,
	.iterate_shared	= xfs_file_readdir,
	.llseek		= generic_file_llseek,
	.unlocked_ioctl	= xfs_file_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= xfs_file_compat_ioctl,
#endif
	.fsync		= xfs_dir_fsync,
};
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
2218
48.82%
57
31.67%
Dave Chinner
841
18.51%
35
19.44%
Dan J Williams
253
5.57%
3
1.67%
Darrick J. Wong
213
4.69%
10
5.56%
Namjae Jeon
179
3.94%
2
1.11%
Al Viro
146
3.21%
14
7.78%
Brian Foster
109
2.40%
5
2.78%
Goldwyn Rodrigues
80
1.76%
1
0.56%
Jie Liu
64
1.41%
4
2.22%
Eryu Guan
52
1.14%
2
1.11%
Jan Kara
52
1.14%
7
3.89%
David Chinner
44
0.97%
1
0.56%
Nathan Scott
39
0.86%
4
2.22%
Matthew Wilcox
32
0.70%
1
0.56%
Lukas Czerner
31
0.68%
2
1.11%
Eric Sandeen
30
0.66%
4
2.22%
Josef Bacik
24
0.53%
2
1.11%
Dave Jiang
21
0.46%
5
2.78%
Russell Cattelan
16
0.35%
1
0.56%
Stephen Lord
16
0.35%
2
1.11%
Andi Kleen
13
0.29%
1
0.56%
David Woodhouse
12
0.26%
1
0.56%
Bill O'Donnell
10
0.22%
1
0.56%
Fabian Frederick
8
0.18%
1
0.56%
Ross Zwisler
8
0.18%
3
1.67%
Souptick Joarder
6
0.13%
1
0.56%
Toshi Kani
5
0.11%
1
0.56%
Arnd Bergmann
4
0.09%
1
0.56%
Lachlan McIlroy
4
0.09%
1
0.56%
Tejun Heo
3
0.07%
1
0.56%
Jeff Layton
2
0.04%
1
0.56%
Thomas Meyer
2
0.04%
1
0.56%
Arjan van de Ven
2
0.04%
1
0.56%
Chris Mason
2
0.04%
1
0.56%
Alexey Dobriyan
1
0.02%
1
0.56%
Fengguang Wu
1
0.02%
1
0.56%
Total
4543
100.00%
180
100.00%
Directory: fs/xfs

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