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Ensure that b_bufsize is set to a range covering the buffer in vndstrategy(). 

This addresses kern/16570 where using the raw vnd device with a file backed by
NFS was failing due to bp->b_bufsize being 0.
This commit is contained in:
briggs 2002-05-02 16:25:23 +00:00
parent 56b4d2cb0c
commit cf294f8f84
1 changed files with 4 additions and 3 deletions
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7
sys/dev/vnd.c
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@ -1,4 +1,4 @@
/* $NetBSD: vnd.c,v 1.78 2002/03/08 20:48:37 thorpej Exp $ */
/* $NetBSD: vnd.c,v 1.79 2002/05/02 16:25:23 briggs Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -98,7 +98,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.78 2002/03/08 20:48:37 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: vnd.c,v 1.79 2002/05/02 16:25:23 briggs Exp $");
#if defined(_KERNEL_OPT)
#include "fs_nfs.h"
@ -455,7 +455,8 @@ vndstrategy(bp)
splx(s);
nbp->vb_buf.b_flags = flags;
nbp->vb_buf.b_bcount = sz;
nbp->vb_buf.b_bufsize = bp->b_bufsize;
nbp->vb_buf.b_bufsize = round_page((ulong)addr + sz)
- trunc_page((ulong) addr);
nbp->vb_buf.b_error = 0;
nbp->vb_buf.b_data = addr;
nbp->vb_buf.b_blkno = nbp->vb_buf.b_rawblkno = nbn + btodb(off);