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PR/31312: Juan RP: Don't use negative cacheing on msdosfs, because of the 

evil case preserving and case sensitive semantics. From FreeBSD.
This commit is contained in:
christos 2005-09-14 15:07:22 +00:00
parent 1d4573eec9
commit fe968d1756
1 changed files with 9 additions and 2 deletions
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11
sys/fs/msdosfs/msdosfs_lookup.c
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@ -1,4 +1,4 @@
/* $NetBSD: msdosfs_lookup.c,v 1.5 2005/05/29 21:00:29 christos Exp $ */
/* $NetBSD: msdosfs_lookup.c,v 1.6 2005/09/14 15:07:22 christos Exp $ */
/*-
* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
@ -48,7 +48,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: msdosfs_lookup.c,v 1.5 2005/05/29 21:00:29 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: msdosfs_lookup.c,v 1.6 2005/09/14 15:07:22 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -397,11 +397,18 @@ notfound:
return (EJUSTRETURN);
}
#if 0
/*
* Insert name into cache (as non-existent) if appropriate.
*
* XXX Negative caching is broken for msdosfs because the name
* cache doesn't understand peculiarities such as case insensitivity
* and 8.3 filenames. Hence, it may not invalidate all negative
* entries if a file with this name is later created.
*/
if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE)
cache_enter(vdp, *vpp, cnp);
#endif
return (ENOENT);