mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-17 18:11:00 +03:00
2efea7c82c
ZFS supports O_RSYNC for read operations and when specified will ensure the same level of data integrity that O_DSYNC and O_SYNC provides for writes. O_RSYNC by itself has no effect so it must be combined with either O_DSYNC or O_SYNC. However, many platforms don't support O_RSYNC and have mapped O_SYNC to mean O_RSYNC within ZFS. This is incorrect and causes unnecessary calls to zil_commit. Only platforms which support O_RSYNC should implement the zil_commit functionality in the read code path. Reviewed-by: Matt Ahrens <mahrens@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: George Wilson <george.wilson@delphix.com> Closes #8523
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License, Version 1.0 only
|
|
* (the "License"). You may not use this file except in compliance
|
|
* with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#ifndef _LIBSPL_SYS_FILE_H
|
|
#define _LIBSPL_SYS_FILE_H
|
|
|
|
#include_next <sys/file.h>
|
|
|
|
#include <sys/user.h>
|
|
|
|
#define FREAD 1
|
|
#define FWRITE 2
|
|
// #define FAPPEND 8
|
|
|
|
#define FCREAT O_CREAT
|
|
#define FTRUNC O_TRUNC
|
|
#define FOFFMAX O_LARGEFILE
|
|
#define FSYNC O_SYNC
|
|
#define FDSYNC O_DSYNC
|
|
#define FEXCL O_EXCL
|
|
|
|
#define FNODSYNC 0x10000 /* fsync pseudo flag */
|
|
#define FNOFOLLOW 0x20000 /* don't follow symlinks */
|
|
#define FIGNORECASE 0x80000 /* request case-insensitive lookups */
|
|
|
|
#endif
|