2005-04-17 00:20:36 +02:00
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/*
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2005-11-02 04:58:39 +01:00
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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2005-04-17 00:20:36 +02:00
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*
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2005-11-02 04:58:39 +01:00
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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2005-04-17 00:20:36 +02:00
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* published by the Free Software Foundation.
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*
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2005-11-02 04:58:39 +01:00
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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2005-04-17 00:20:36 +02:00
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*
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2005-11-02 04:58:39 +01:00
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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2005-04-17 00:20:36 +02:00
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*/
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#include "xfs.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_bit.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_log.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_inum.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_sb.h"
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2005-11-02 04:38:42 +01:00
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#include "xfs_ag.h"
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2005-04-17 00:20:36 +02:00
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#include "xfs_dir2.h"
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#include "xfs_trans.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_alloc.h"
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#include "xfs_btree.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_error.h"
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#include "xfs_rw.h"
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#include "xfs_ioctl32.h"
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2007-08-29 02:58:01 +02:00
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#include "xfs_vnodeops.h"
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2005-04-17 00:20:36 +02:00
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#include <linux/dcache.h>
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#include <linux/smp_lock.h>
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2006-03-14 04:00:35 +01:00
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static struct vm_operations_struct xfs_file_vm_ops;
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2005-04-17 00:20:36 +02:00
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2007-02-10 08:34:56 +01:00
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STATIC_INLINE ssize_t
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2006-03-14 04:00:35 +01:00
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__xfs_file_read(
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2005-04-17 00:20:36 +02:00
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struct kiocb *iocb,
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2006-10-01 08:28:46 +02:00
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const struct iovec *iov,
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unsigned long nr_segs,
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2005-04-17 00:20:36 +02:00
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int ioflags,
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loff_t pos)
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{
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struct file *file = iocb->ki_filp;
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BUG_ON(iocb->ki_pos != pos);
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if (unlikely(file->f_flags & O_DIRECT))
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ioflags |= IO_ISDIRECT;
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2007-08-29 02:58:01 +02:00
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return xfs_read(XFS_I(file->f_path.dentry->d_inode), iocb, iov,
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nr_segs, &iocb->ki_pos, ioflags);
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2005-04-17 00:20:36 +02:00
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}
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STATIC ssize_t
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2006-03-14 04:00:35 +01:00
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xfs_file_aio_read(
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2005-04-17 00:20:36 +02:00
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struct kiocb *iocb,
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2006-10-01 08:28:46 +02:00
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const struct iovec *iov,
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unsigned long nr_segs,
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2005-04-17 00:20:36 +02:00
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loff_t pos)
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{
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2006-10-01 08:28:46 +02:00
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return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO, pos);
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2005-04-17 00:20:36 +02:00
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}
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STATIC ssize_t
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2006-03-14 04:00:35 +01:00
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xfs_file_aio_read_invis(
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2005-04-17 00:20:36 +02:00
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struct kiocb *iocb,
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2006-10-01 08:28:46 +02:00
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const struct iovec *iov,
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unsigned long nr_segs,
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2005-04-17 00:20:36 +02:00
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loff_t pos)
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{
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2006-10-01 08:28:46 +02:00
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return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
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2005-04-17 00:20:36 +02:00
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}
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2007-02-10 08:34:56 +01:00
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STATIC_INLINE ssize_t
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2006-03-14 04:00:35 +01:00
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__xfs_file_write(
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2006-10-01 08:28:46 +02:00
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struct kiocb *iocb,
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const struct iovec *iov,
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unsigned long nr_segs,
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int ioflags,
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loff_t pos)
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2005-04-17 00:20:36 +02:00
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{
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struct file *file = iocb->ki_filp;
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BUG_ON(iocb->ki_pos != pos);
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if (unlikely(file->f_flags & O_DIRECT))
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ioflags |= IO_ISDIRECT;
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2007-08-29 02:58:01 +02:00
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return xfs_write(XFS_I(file->f_mapping->host), iocb, iov, nr_segs,
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&iocb->ki_pos, ioflags);
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2005-04-17 00:20:36 +02:00
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}
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STATIC ssize_t
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2006-03-14 04:00:35 +01:00
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xfs_file_aio_write(
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2005-04-17 00:20:36 +02:00
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struct kiocb *iocb,
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2006-10-01 08:28:46 +02:00
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const struct iovec *iov,
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unsigned long nr_segs,
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2005-04-17 00:20:36 +02:00
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loff_t pos)
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{
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2006-10-01 08:28:46 +02:00
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return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO, pos);
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2005-04-17 00:20:36 +02:00
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}
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STATIC ssize_t
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2006-03-14 04:00:35 +01:00
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xfs_file_aio_write_invis(
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2005-04-17 00:20:36 +02:00
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struct kiocb *iocb,
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2006-10-01 08:28:46 +02:00
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const struct iovec *iov,
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unsigned long nr_segs,
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2005-04-17 00:20:36 +02:00
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loff_t pos)
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{
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2006-10-01 08:28:46 +02:00
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return __xfs_file_write(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
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2005-04-17 00:20:36 +02:00
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}
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2006-03-31 05:08:59 +02:00
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STATIC ssize_t
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xfs_file_splice_read(
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struct file *infilp,
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2006-04-11 14:57:50 +02:00
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loff_t *ppos,
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2006-04-10 15:18:35 +02:00
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struct pipe_inode_info *pipe,
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2006-03-31 05:08:59 +02:00
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size_t len,
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unsigned int flags)
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{
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2007-08-29 02:58:01 +02:00
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return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
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infilp, ppos, pipe, len, flags, 0);
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2006-03-31 05:08:59 +02:00
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}
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STATIC ssize_t
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xfs_file_splice_read_invis(
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struct file *infilp,
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2006-04-11 14:57:50 +02:00
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loff_t *ppos,
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2006-04-10 15:18:35 +02:00
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struct pipe_inode_info *pipe,
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2006-03-31 05:08:59 +02:00
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size_t len,
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unsigned int flags)
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{
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2007-08-29 02:58:01 +02:00
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return xfs_splice_read(XFS_I(infilp->f_path.dentry->d_inode),
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infilp, ppos, pipe, len, flags, IO_INVIS);
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2006-03-31 05:08:59 +02:00
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}
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STATIC ssize_t
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xfs_file_splice_write(
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2006-04-10 15:18:35 +02:00
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struct pipe_inode_info *pipe,
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2006-03-31 05:08:59 +02:00
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struct file *outfilp,
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2006-04-11 14:57:50 +02:00
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loff_t *ppos,
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2006-03-31 05:08:59 +02:00
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size_t len,
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unsigned int flags)
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{
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2007-08-29 02:58:01 +02:00
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return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
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pipe, outfilp, ppos, len, flags, 0);
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2006-03-31 05:08:59 +02:00
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}
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STATIC ssize_t
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xfs_file_splice_write_invis(
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2006-04-10 15:18:35 +02:00
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struct pipe_inode_info *pipe,
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2006-03-31 05:08:59 +02:00
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struct file *outfilp,
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2006-04-11 14:57:50 +02:00
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loff_t *ppos,
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2006-03-31 05:08:59 +02:00
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size_t len,
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unsigned int flags)
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{
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2007-08-29 02:58:01 +02:00
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return xfs_splice_write(XFS_I(outfilp->f_path.dentry->d_inode),
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pipe, outfilp, ppos, len, flags, IO_INVIS);
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2006-03-31 05:08:59 +02:00
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}
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2005-04-17 00:20:36 +02:00
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STATIC int
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2006-03-14 04:00:35 +01:00
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xfs_file_open(
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2005-04-17 00:20:36 +02:00
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struct inode *inode,
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struct file *filp)
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{
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if (!(filp->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
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return -EFBIG;
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2007-08-29 02:58:01 +02:00
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return -xfs_open(XFS_I(inode));
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2005-04-17 00:20:36 +02:00
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}
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STATIC int
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2006-03-14 04:00:35 +01:00
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xfs_file_release(
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2005-04-17 00:20:36 +02:00
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struct inode *inode,
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struct file *filp)
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{
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2007-08-29 02:58:01 +02:00
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return -xfs_release(XFS_I(inode));
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2005-04-17 00:20:36 +02:00
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}
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2008-05-19 08:29:46 +02:00
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/*
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* We ignore the datasync flag here because a datasync is effectively
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* identical to an fsync. That is, datasync implies that we need to write
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* only the metadata needed to be able to access the data that is written
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* if we crash after the call completes. Hence if we are writing beyond
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* EOF we have to log the inode size change as well, which makes it a
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* full fsync. If we don't write beyond EOF, the inode core will be
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* clean in memory and so we don't need to log the inode, just like
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* fsync.
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*/
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2005-04-17 00:20:36 +02:00
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STATIC int
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2006-03-14 04:00:35 +01:00
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xfs_file_fsync(
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2005-04-17 00:20:36 +02:00
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struct file *filp,
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struct dentry *dentry,
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int datasync)
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{
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2007-08-29 03:44:37 +02:00
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xfs_iflags_clear(XFS_I(dentry->d_inode), XFS_ITRUNCATED);
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2008-05-19 08:29:46 +02:00
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return -xfs_fsync(XFS_I(dentry->d_inode));
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2005-04-17 00:20:36 +02:00
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}
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STATIC int
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2006-03-14 04:00:35 +01:00
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xfs_file_readdir(
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2005-04-17 00:20:36 +02:00
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struct file *filp,
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void *dirent,
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filldir_t filldir)
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{
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2007-08-28 05:58:24 +02:00
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struct inode *inode = filp->f_path.dentry->d_inode;
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2007-08-29 02:58:01 +02:00
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xfs_inode_t *ip = XFS_I(inode);
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2007-08-28 05:58:24 +02:00
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int error;
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size_t bufsize;
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/*
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* The Linux API doesn't pass down the total size of the buffer
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* we read into down to the filesystem. With the filldir concept
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* it's not needed for correct information, but the XFS dir2 leaf
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* code wants an estimate of the buffer size to calculate it's
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* readahead window and size the buffers used for mapping to
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* physical blocks.
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*
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* Try to give it an estimate that's good enough, maybe at some
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* point we can change the ->readdir prototype to include the
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* buffer size.
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*/
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bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size);
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2007-08-29 02:58:01 +02:00
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error = xfs_readdir(ip, dirent, bufsize,
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2007-08-28 05:58:24 +02:00
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(xfs_off_t *)&filp->f_pos, filldir);
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if (error)
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return -error;
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return 0;
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2005-04-17 00:20:36 +02:00
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}
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STATIC int
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2006-03-14 04:00:35 +01:00
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xfs_file_mmap(
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2005-04-17 00:20:36 +02:00
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struct file *filp,
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struct vm_area_struct *vma)
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{
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2006-03-14 04:00:35 +01:00
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vma->vm_ops = &xfs_file_vm_ops;
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2007-07-19 10:47:03 +02:00
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vma->vm_flags |= VM_CAN_NONLINEAR;
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2005-06-21 06:07:45 +02:00
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2006-06-09 06:52:13 +02:00
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file_accessed(filp);
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2005-04-17 00:20:36 +02:00
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return 0;
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}
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STATIC long
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2006-03-14 04:00:35 +01:00
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xfs_file_ioctl(
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2005-04-17 00:20:36 +02:00
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struct file *filp,
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unsigned int cmd,
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2006-06-09 09:00:52 +02:00
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unsigned long p)
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2005-04-17 00:20:36 +02:00
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{
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int error;
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2006-12-08 11:36:49 +01:00
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struct inode *inode = filp->f_path.dentry->d_inode;
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2005-04-17 00:20:36 +02:00
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2007-08-29 02:58:01 +02:00
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error = xfs_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
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2007-08-29 03:44:37 +02:00
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xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
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2005-04-17 00:20:36 +02:00
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/* NOTE: some of the ioctl's return positive #'s as a
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* byte count indicating success, such as
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* readlink_by_handle. So we don't "sign flip"
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* like most other routines. This means true
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* errors need to be returned as a negative value.
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*/
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return error;
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}
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STATIC long
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2006-03-14 04:00:35 +01:00
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xfs_file_ioctl_invis(
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2005-04-17 00:20:36 +02:00
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struct file *filp,
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unsigned int cmd,
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2006-06-09 09:00:52 +02:00
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unsigned long p)
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2005-04-17 00:20:36 +02:00
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{
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2006-03-31 05:08:59 +02:00
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int error;
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2006-12-08 11:36:49 +01:00
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struct inode *inode = filp->f_path.dentry->d_inode;
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2005-04-17 00:20:36 +02:00
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|
2007-08-29 02:58:01 +02:00
|
|
|
error = xfs_ioctl(XFS_I(inode), filp, IO_INVIS, cmd, (void __user *)p);
|
2007-08-29 03:44:37 +02:00
|
|
|
xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* NOTE: some of the ioctl's return positive #'s as a
|
|
|
|
* byte count indicating success, such as
|
|
|
|
* readlink_by_handle. So we don't "sign flip"
|
|
|
|
* like most other routines. This means true
|
|
|
|
* errors need to be returned as a negative value.
|
|
|
|
*/
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2007-07-19 08:28:17 +02:00
|
|
|
/*
|
|
|
|
* mmap()d file has taken write protection fault and is being made
|
|
|
|
* writable. We can set the page state up correctly for a writable
|
|
|
|
* page, which means we can do correct delalloc accounting (ENOSPC
|
|
|
|
* checking!) and unwritten extent mapping.
|
|
|
|
*/
|
|
|
|
STATIC int
|
|
|
|
xfs_vm_page_mkwrite(
|
|
|
|
struct vm_area_struct *vma,
|
|
|
|
struct page *page)
|
|
|
|
{
|
|
|
|
return block_page_mkwrite(vma, page, xfs_get_blocks);
|
|
|
|
}
|
|
|
|
|
2006-03-28 11:56:42 +02:00
|
|
|
const struct file_operations xfs_file_operations = {
|
2005-04-17 00:20:36 +02:00
|
|
|
.llseek = generic_file_llseek,
|
|
|
|
.read = do_sync_read,
|
2005-09-02 07:43:05 +02:00
|
|
|
.write = do_sync_write,
|
2006-03-14 04:00:35 +01:00
|
|
|
.aio_read = xfs_file_aio_read,
|
|
|
|
.aio_write = xfs_file_aio_write,
|
2006-03-31 05:08:59 +02:00
|
|
|
.splice_read = xfs_file_splice_read,
|
|
|
|
.splice_write = xfs_file_splice_write,
|
2006-03-14 04:00:35 +01:00
|
|
|
.unlocked_ioctl = xfs_file_ioctl,
|
2005-04-17 00:20:36 +02:00
|
|
|
#ifdef CONFIG_COMPAT
|
2006-03-14 04:00:35 +01:00
|
|
|
.compat_ioctl = xfs_file_compat_ioctl,
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
2006-03-14 04:00:35 +01:00
|
|
|
.mmap = xfs_file_mmap,
|
|
|
|
.open = xfs_file_open,
|
|
|
|
.release = xfs_file_release,
|
|
|
|
.fsync = xfs_file_fsync,
|
2005-04-17 00:20:36 +02:00
|
|
|
#ifdef HAVE_FOP_OPEN_EXEC
|
2006-03-14 04:00:35 +01:00
|
|
|
.open_exec = xfs_file_open_exec,
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
2006-03-28 11:56:42 +02:00
|
|
|
const struct file_operations xfs_invis_file_operations = {
|
2005-04-17 00:20:36 +02:00
|
|
|
.llseek = generic_file_llseek,
|
|
|
|
.read = do_sync_read,
|
2005-09-02 07:43:05 +02:00
|
|
|
.write = do_sync_write,
|
2006-03-14 04:00:35 +01:00
|
|
|
.aio_read = xfs_file_aio_read_invis,
|
|
|
|
.aio_write = xfs_file_aio_write_invis,
|
2006-03-31 05:08:59 +02:00
|
|
|
.splice_read = xfs_file_splice_read_invis,
|
|
|
|
.splice_write = xfs_file_splice_write_invis,
|
2006-03-14 04:00:35 +01:00
|
|
|
.unlocked_ioctl = xfs_file_ioctl_invis,
|
2005-04-17 00:20:36 +02:00
|
|
|
#ifdef CONFIG_COMPAT
|
2006-03-14 04:00:35 +01:00
|
|
|
.compat_ioctl = xfs_file_compat_invis_ioctl,
|
2005-04-17 00:20:36 +02:00
|
|
|
#endif
|
2006-03-14 04:00:35 +01:00
|
|
|
.mmap = xfs_file_mmap,
|
|
|
|
.open = xfs_file_open,
|
|
|
|
.release = xfs_file_release,
|
|
|
|
.fsync = xfs_file_fsync,
|
2005-04-17 00:20:36 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
|
2006-03-28 11:56:42 +02:00
|
|
|
const struct file_operations xfs_dir_file_operations = {
|
2005-04-17 00:20:36 +02:00
|
|
|
.read = generic_read_dir,
|
2006-03-14 04:00:35 +01:00
|
|
|
.readdir = xfs_file_readdir,
|
2008-08-24 13:24:41 +02:00
|
|
|
.llseek = generic_file_llseek,
|
2006-03-14 04:00:35 +01:00
|
|
|
.unlocked_ioctl = xfs_file_ioctl,
|
2005-05-06 15:44:46 +02:00
|
|
|
#ifdef CONFIG_COMPAT
|
2006-03-14 04:00:35 +01:00
|
|
|
.compat_ioctl = xfs_file_compat_ioctl,
|
2005-05-06 15:44:46 +02:00
|
|
|
#endif
|
2006-03-14 04:00:35 +01:00
|
|
|
.fsync = xfs_file_fsync,
|
2005-04-17 00:20:36 +02:00
|
|
|
};
|
|
|
|
|
2006-03-14 04:00:35 +01:00
|
|
|
static struct vm_operations_struct xfs_file_vm_ops = {
|
2007-07-19 10:46:59 +02:00
|
|
|
.fault = filemap_fault,
|
2007-07-19 08:28:17 +02:00
|
|
|
.page_mkwrite = xfs_vm_page_mkwrite,
|
2005-06-21 06:07:45 +02:00
|
|
|
};
|