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Update nwfs_lookup() to match the current cache_lookup() API.

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cache_lookup() has returned a ref'ed and locked vnode since
vfs_cache.c:1.96, dated Tue Mar 29 12:59:06 2005 UTC.  This change
is similar to the change made to smbfs_lookup() in smbfs_vnops.c:1.58.

Tested by:	"Antony Mawer" ant AT mawer.org
MFC after:	2 weeks
This commit is contained in:
Don Lewis 2005-10-16 21:54:35 +00:00
parent 3554cddbfa
commit 8bcc0d3f95
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=151394
1 changed files with 11 additions and 26 deletions
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37
sys/fs/nwfs/nwfs_vnops.c
View File

@ -874,34 +874,19 @@ printf("dvp %d:%d:%d\n", (int)mp, (int)dvp->v_vflag & VV_ROOT, (int)flags & ISDO
if (error) { /* name was found */
struct vattr vattr;
vhold(*vpp);
vp = *vpp;
if (dvp == vp) { /* lookup on current */
vref(vp);
error = 0;
NCPVNDEBUG("cached '.'");
} else if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0, td); /* unlock parent */
error = vget(vp, LK_EXCLUSIVE, td);
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
} else
error = vget(vp, LK_EXCLUSIVE, td);
if (!error) {
if (!VOP_GETATTR(vp, &vattr, cnp->cn_cred, td)
&& vattr.va_ctime.tv_sec == VTONW(vp)->n_ctime) {
if (nameiop != LOOKUP && islastcn)
cnp->cn_flags |= SAVENAME;
NCPVNDEBUG("use cached vnode");
vdrop(vp);
return (0);
}
cache_purge(vp);
if (vp != dvp)
vput(vp);
else
vrele(vp);
if (VOP_GETATTR(vp, &vattr, cnp->cn_cred, td) == 0 &&
vattr.va_ctime.tv_sec == VTONW(vp)->n_ctime) {
if (nameiop != LOOKUP && islastcn)
cnp->cn_flags |= SAVENAME;
NCPVNDEBUG("use cached vnode");
return (0);
}
vdrop(vp);
cache_purge(vp);
if (vp != dvp)
vput(vp);
else
vrele(vp);
*vpp = NULLVP;
}
/* not in cache, so ... */