root/fs/xfs/linux-2.6/xfs_fs_subr.c

DEFINITIONS

1. fs_noerr
2. fs_nosys
3. fs_noval
4. xfs_tosspages
5. xfs_flushinval_pages
6. xfs_flush_pages

/*
 * 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"

int  fs_noerr(void) { return 0; }
int  fs_nosys(void) { return ENOSYS; }
void fs_noval(void) { return; }

void
xfs_tosspages(
        xfs_inode_t     *ip,
        xfs_off_t       first,
        xfs_off_t       last,
        int             fiopt)
{
        struct address_space *mapping = VFS_I(ip)->i_mapping;

        if (mapping->nrpages)
                truncate_inode_pages(mapping, first);
}

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;

        if (mapping->nrpages) {
                xfs_iflags_clear(ip, XFS_ITRUNCATED);
                ret = filemap_write_and_wait(mapping);
                if (!ret)
                        truncate_inode_pages(mapping, first);
        }
        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;

        if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
                xfs_iflags_clear(ip, XFS_ITRUNCATED);
                ret = filemap_fdatawrite(mapping);
                if (flags & XFS_B_ASYNC)
                        return ret;
                ret2 = filemap_fdatawait(mapping);
                if (!ret)
                        ret = ret2;
        }
        return ret;
}