61d5d4362b
genfs_getpages() can read in more blocks than it should due to faked filesize
of lfs_gop_size(). it's a security problem and it makes gcc3 "internal error"
to fix this,
- in genfs_getpages(), always calculate diskeof and memeof separately
so that filesystems (in this case, lfs) can use different strategies
for them.
- introduce GOP_SIZE_MEM flag and use it to request in-core filesize.
(it was an intention of GOP_SIZE_READ,
but after the above change _READ is not a straightforward name)
after this, no one uses GOP_SIZE_{READ,WRITE} anymore but leave them for now.
69 lines
2.9 KiB
C
69 lines
2.9 KiB
C
/* $NetBSD: genfs_node.h,v 1.5 2003/09/24 10:22:53 yamt Exp $ */
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/*
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* Copyright (c) 2001 Chuck Silvers.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Chuck Silvers.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MISCFS_GENFS_GENFS_NODE_H_
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#define _MISCFS_GENFS_GENFS_NODE_H_
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struct vm_page;
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struct genfs_ops {
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void (*gop_size)(struct vnode *, off_t, off_t *, int);
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int (*gop_alloc)(struct vnode *, off_t, off_t, int, struct ucred *);
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int (*gop_write)(struct vnode *, struct vm_page **, int, int);
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};
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#define GOP_SIZE(vp, size, eobp, flags) \
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(*VTOG(vp)->g_op->gop_size)((vp), (size), (eobp), (flags))
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#define GOP_ALLOC(vp, off, len, flags, cred) \
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(*VTOG(vp)->g_op->gop_alloc)((vp), (off), (len), (flags), (cred))
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#define GOP_WRITE(vp, pgs, npages, flags) \
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(*VTOG(vp)->g_op->gop_write)((vp), (pgs), (npages), (flags))
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/* Flags to GOP_SIZE */
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#define GOP_SIZE_READ 0x1 /* Advise how many pages to read */
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#define GOP_SIZE_WRITE 0x2 /* Tell how many pages to write */
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#define GOP_SIZE_MEM 0x4 /* in-memory size */
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struct genfs_node {
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struct genfs_ops *g_op; /* ops vector */
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struct lock g_glock; /* getpages lock */
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};
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#define VTOG(vp) ((struct genfs_node *)(vp)->v_data)
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void genfs_size(struct vnode *, off_t, off_t *, int);
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void genfs_node_init(struct vnode *, struct genfs_ops *);
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int genfs_gop_write(struct vnode *, struct vm_page **, int, int);
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int genfs_compat_gop_write(struct vnode *, struct vm_page **, int, int);
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#endif /* _MISCFS_GENFS_GENFS_NODE_H_ */
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