mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
ce7ae151dd
There is no fundamental need to keep an in-memory inode size copy in the XFS inode. We already have the on-disk value in the dinode, and the separate in-memory copy that we need for regular files only in the XFS inode. Remove the xfs_inode i_size field and change the XFS_ISIZE macro to use the VFS inode i_size field for regular files. Switch code that was directly accessing the i_size field in the xfs_inode to XFS_ISIZE, or in cases where we are limited to regular files direct access of the VFS inode i_size field. This also allows dropping some fairly complicated code in the write path which dealt with keeping the xfs_inode i_size uptodate with the VFS i_size that is getting updated inside ->write_end. Note that we do not bother resetting the VFS i_size when truncating a file that gets freed to zero as there is no point in doing so because the VFS inode is no longer in use at this point. Just relax the assert in xfs_ifree to only check the on-disk size instead. Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2000-2002,2005-2006 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_vnodeops.h"
|
|
#include "xfs_bmap_btree.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_trace.h"
|
|
|
|
/*
|
|
* note: all filemap functions return negative error codes. These
|
|
* need to be inverted before returning to the xfs core functions.
|
|
*/
|
|
void
|
|
xfs_tosspages(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t first,
|
|
xfs_off_t last,
|
|
int fiopt)
|
|
{
|
|
/* can't toss partial tail pages, so mask them out */
|
|
last &= ~(PAGE_SIZE - 1);
|
|
truncate_inode_pages_range(VFS_I(ip)->i_mapping, first, last - 1);
|
|
}
|
|
|
|
int
|
|
xfs_flushinval_pages(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t first,
|
|
xfs_off_t last,
|
|
int fiopt)
|
|
{
|
|
struct address_space *mapping = VFS_I(ip)->i_mapping;
|
|
int ret = 0;
|
|
|
|
trace_xfs_pagecache_inval(ip, first, last);
|
|
|
|
xfs_iflags_clear(ip, XFS_ITRUNCATED);
|
|
ret = filemap_write_and_wait_range(mapping, first,
|
|
last == -1 ? LLONG_MAX : last);
|
|
if (!ret)
|
|
truncate_inode_pages_range(mapping, first, last);
|
|
return -ret;
|
|
}
|
|
|
|
int
|
|
xfs_flush_pages(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t first,
|
|
xfs_off_t last,
|
|
uint64_t flags,
|
|
int fiopt)
|
|
{
|
|
struct address_space *mapping = VFS_I(ip)->i_mapping;
|
|
int ret = 0;
|
|
int ret2;
|
|
|
|
xfs_iflags_clear(ip, XFS_ITRUNCATED);
|
|
ret = -filemap_fdatawrite_range(mapping, first,
|
|
last == -1 ? LLONG_MAX : last);
|
|
if (flags & XBF_ASYNC)
|
|
return ret;
|
|
ret2 = xfs_wait_on_pages(ip, first, last);
|
|
if (!ret)
|
|
ret = ret2;
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
xfs_wait_on_pages(
|
|
xfs_inode_t *ip,
|
|
xfs_off_t first,
|
|
xfs_off_t last)
|
|
{
|
|
struct address_space *mapping = VFS_I(ip)->i_mapping;
|
|
|
|
if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
|
|
return -filemap_fdatawait_range(mapping, first,
|
|
last == -1 ? XFS_ISIZE(ip) - 1 : last);
|
|
}
|
|
return 0;
|
|
}
|