90effb2341
o Provide a new VOP_GETPAGES_ASYNC(), which works like VOP_GETPAGES(), but doesn't sleep. It returns immediately, and will execute the I/O done handler function that must be supplied as argument. o Provide VOP_GETPAGES_ASYNC() for the FFS, which uses vnode_pager. o Extend pagertab to support pgo_getpages_async method, and implement this method for vnode_pager. Reviewed by: kib Tested by: pho Sponsored by: Netflix Sponsored by: Nginx, Inc.
59 lines
2.6 KiB
C
59 lines
2.6 KiB
C
/*-
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* Copyright (c) 1990 University of Utah.
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vnode_pager.h 8.1 (Berkeley) 6/11/93
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* $FreeBSD$
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*/
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#ifndef _VNODE_PAGER_
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#define _VNODE_PAGER_ 1
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#ifdef _KERNEL
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int vnode_pager_generic_getpages(struct vnode *vp, vm_page_t *m,
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int count, int reqpage, vop_getpages_iodone_t iodone, void *arg);
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int vnode_pager_generic_putpages(struct vnode *vp, vm_page_t *m,
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int count, boolean_t sync,
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int *rtvals);
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int vnode_pager_local_getpages(struct vop_getpages_args *ap);
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int vnode_pager_local_getpages_async(struct vop_getpages_async_args *ap);
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void vnode_pager_release_writecount(vm_object_t object, vm_offset_t start,
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vm_offset_t end);
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void vnode_pager_undirty_pages(vm_page_t *ma, int *rtvals, int written);
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void vnode_pager_update_writecount(vm_object_t object, vm_offset_t start,
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vm_offset_t end);
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#endif /* _KERNEL */
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#endif /* _VNODE_PAGER_ */
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