[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / xfs / linux-2.6 / xfs_fs_subr.c

/*
 * Copyright (c) 2000-2002,2005 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"

/*
 * Stub for no-op vnode operations that return error status.
 */
int
fs_noerr(void)
{
	return 0;
}

/*
 * Operation unsupported under this file system.
 */
int
fs_nosys(void)
{
	return ENOSYS;
}

/*
 * Stub for inactive, strategy, and read/write lock/unlock.  Does nothing.
 */
/* ARGSUSED */
void
fs_noval(void)
{
}

/*
 * vnode pcache layer for vnode_tosspages.
 * 'last' parameter unused but left in for IRIX compatibility
 */
void
fs_tosspages(
	bhv_desc_t	*bdp,
	xfs_off_t	first,
	xfs_off_t	last,
	int		fiopt)
{
	vnode_t		*vp = BHV_TO_VNODE(bdp);
	struct inode	*ip = vn_to_inode(vp);

	if (VN_CACHED(vp))
		truncate_inode_pages(ip->i_mapping, first);
}


/*
 * vnode pcache layer for vnode_flushinval_pages.
 * 'last' parameter unused but left in for IRIX compatibility
 */
void
fs_flushinval_pages(
	bhv_desc_t	*bdp,
	xfs_off_t	first,
	xfs_off_t	last,
	int		fiopt)
{
	vnode_t		*vp = BHV_TO_VNODE(bdp);
	struct inode	*ip = vn_to_inode(vp);

	if (VN_CACHED(vp)) {
		filemap_write_and_wait(ip->i_mapping);

		truncate_inode_pages(ip->i_mapping, first);
	}
}

/*
 * vnode pcache layer for vnode_flush_pages.
 * 'last' parameter unused but left in for IRIX compatibility
 */
int
fs_flush_pages(
	bhv_desc_t	*bdp,
	xfs_off_t	first,
	xfs_off_t	last,
	uint64_t	flags,
	int		fiopt)
{
	vnode_t		*vp = BHV_TO_VNODE(bdp);
	struct inode	*ip = vn_to_inode(vp);

	if (VN_CACHED(vp)) {
		filemap_fdatawrite(ip->i_mapping);
		if (flags & XFS_B_ASYNC)
			return 0;
		filemap_fdatawait(ip->i_mapping);
	}

	return 0;
}
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18
	19	#include "xfs.h"
	20
	21	/*
	22	* Stub for no-op vnode operations that return error status.
	23	*/
	24	int
	25	fs_noerr(void)
	26	{
	27	return 0;
	28	}
	29
	30	/*
	31	* Operation unsupported under this file system.
	32	*/
	33	int
	34	fs_nosys(void)
	35	{
	36	return ENOSYS;
	37	}
	38
	39	/*
	40	* Stub for inactive, strategy, and read/write lock/unlock. Does nothing.
	41	*/
	42	/* ARGSUSED */
	43	void
	44	fs_noval(void)
	45	{
	46	}
	47
	48	/*
	49	* vnode pcache layer for vnode_tosspages.
	50	* 'last' parameter unused but left in for IRIX compatibility
	51	*/
	52	void
	53	fs_tosspages(
	54	bhv_desc_t *bdp,
	55	xfs_off_t first,
	56	xfs_off_t last,
	57	int fiopt)
	58	{
	59	vnode_t *vp = BHV_TO_VNODE(bdp);
ec86dc02	60	struct inode *ip = vn_to_inode(vp);
1da177e4 LT	61
	62	if (VN_CACHED(vp))
	63	truncate_inode_pages(ip->i_mapping, first);
	64	}
	65
	66
	67	/*
	68	* vnode pcache layer for vnode_flushinval_pages.
	69	* 'last' parameter unused but left in for IRIX compatibility
	70	*/
	71	void
	72	fs_flushinval_pages(
	73	bhv_desc_t *bdp,
	74	xfs_off_t first,
	75	xfs_off_t last,
	76	int fiopt)
	77	{
	78	vnode_t *vp = BHV_TO_VNODE(bdp);
ec86dc02	79	struct inode *ip = vn_to_inode(vp);
1da177e4 LT	80
1da177e4 LT	81	if (VN_CACHED(vp)) {
28fd1298	82	filemap_write_and_wait(ip->i_mapping);
1da177e4 LT	83
	84	truncate_inode_pages(ip->i_mapping, first);
	85	}
	86	}
	87
	88	/*
	89	* vnode pcache layer for vnode_flush_pages.
	90	* 'last' parameter unused but left in for IRIX compatibility
	91	*/
	92	int
	93	fs_flush_pages(
	94	bhv_desc_t *bdp,
	95	xfs_off_t first,
	96	xfs_off_t last,
	97	uint64_t flags,
	98	int fiopt)
	99	{
	100	vnode_t *vp = BHV_TO_VNODE(bdp);
ec86dc02	101	struct inode *ip = vn_to_inode(vp);
1da177e4 LT	102
	103	if (VN_CACHED(vp)) {
	104	filemap_fdatawrite(ip->i_mapping);
ee34807a NS	105	if (flags & XFS_B_ASYNC)
ee34807a NS	106	return 0;
1da177e4 LT	107	filemap_fdatawait(ip->i_mapping);
	108	}
	109
	110	return 0;
	111	}