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The name of the flag used to mark a bio as synchronous has changed again in the 2.6.36 kernel due to the unification of the BIO_RW_* and REQ_* flags. The new flag is called REQ_SYNC. To simplify checking this flag I have introduced the vdev_disk_dio_is_sync() helper function. Based on the results of several new autoconf tests it uses the correct mask to check for a synchronous bio. Preferred interface for flagging a synchronous bio: 2.6.12-2.6.29: BIO_RW_SYNC 2.6.30-2.6.35: BIO_RW_SYNCIO 2.6.36-2.6.xx: REQ_SYNC
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (C) 2008-2010 Lawrence Livermore National Security, LLC.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* LLNL-CODE-403049.
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*/
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#ifndef _SYS_VDEV_DISK_H
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#define _SYS_VDEV_DISK_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _KERNEL
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#include <sys/vdev.h>
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#include <sys/ddi.h>
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#include <sys/sunldi.h>
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#include <sys/sunddi.h>
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typedef struct vdev_disk {
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ddi_devid_t vd_devid;
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char *vd_minor;
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struct block_device *vd_bdev;
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} vdev_disk_t;
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extern int vdev_disk_physio(struct block_device *, caddr_t,
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size_t, uint64_t, int);
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extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
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/* 2.6.24 API change */
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#ifdef HAVE_2ARGS_BIO_END_IO_T
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# define BIO_END_IO_PROTO(fn, x, y, z) static void fn(struct bio *x, int z)
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# define BIO_END_IO_RETURN(rc) return
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#else
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# define BIO_END_IO_PROTO(fn, x, y, z) static int fn(struct bio *x, \
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unsigned int y, int z)
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# define BIO_END_IO_RETURN(rc) return rc
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#endif /* HAVE_2ARGS_BIO_END_IO_T */
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/* 2.6.28 API change */
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#ifdef HAVE_OPEN_BDEV_EXCLUSIVE
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# define vdev_bdev_open(path, md, hld) open_bdev_exclusive(path, md, hld)
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# define vdev_bdev_close(bdev, md) close_bdev_exclusive(bdev, md)
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#else
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# define vdev_bdev_open(path, md, hld) open_bdev_excl(path, md, hld)
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# define vdev_bdev_close(bdev, md) close_bdev_excl(bdev)
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#endif /* HAVE_OPEN_BDEV_EXCLUSIVE */
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/* 2.6.22 API change */
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#ifdef HAVE_1ARG_INVALIDATE_BDEV
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# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev)
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#else
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# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev, 1)
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#endif /* HAVE_1ARG_INVALIDATE_BDEV */
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/* 2.6.30 API change */
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#ifdef HAVE_BDEV_LOGICAL_BLOCK_SIZE
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# define vdev_bdev_block_size(bdev) bdev_logical_block_size(bdev)
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#else
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# define vdev_bdev_block_size(bdev) bdev_hardsect_size(bdev)
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#endif
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#endif /* _KERNEL */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_VDEV_DISK_H */
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