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Preserve the ISWHITEOUT flag between cache_enter() and cache_lookup().

This commit is contained in:
mycroft 1995-05-30 09:02:02 +00:00
parent eb310b67a7
commit 53eb79fc69
1 changed files with 12 additions and 3 deletions
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15
sys/kern/vfs_cache.c
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@ -1,4 +1,4 @@
/* $NetBSD: vfs_cache.c,v 1.10 1994/12/13 09:14:34 mycroft Exp $ */
/* $NetBSD: vfs_cache.c,v 1.11 1995/05/30 09:02:02 mycroft Exp $ */
/*
* Copyright (c) 1989, 1993
@ -120,6 +120,10 @@ cache_lookup(dvp, vpp, cnp)
if ((cnp->cn_flags & MAKEENTRY) == 0) {
nchstats.ncs_badhits++;
} else if (ncp->nc_vp == NULL) {
/*
* Restore the ISWHITEOUT flag saved earlier.
*/
cnp->cn_flags |= ncp->nc_vpid;
if (cnp->cn_nameiop != CREATE) {
nchstats.ncs_neghits++;
/*
@ -196,8 +200,13 @@ cache_enter(dvp, vp, cnp)
ncp->nc_vp = vp;
if (vp)
ncp->nc_vpid = vp->v_id;
else
ncp->nc_vpid = 0;
else {
/*
* For negative hits, save the ISWHITEOUT flag so we can
* restore it later when the cache entry is used again.
*/
ncp->nc_vpid = cnp->cn_flags & ISWHITEOUT;
}
/* fill in cache info */
ncp->nc_dvp = dvp;
ncp->nc_dvpid = dvp->v_id;