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Reorder and clean up make_coda_node(), annotate weaknesses in the

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implementation.

MFC after:	1 month
This commit is contained in:
Robert Watson 2008-02-15 11:58:11 +00:00
parent 63b4a1f80c
commit 93b510870f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=176307
1 changed files with 25 additions and 20 deletions
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45
sys/fs/coda/coda_vnops.c
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@ -1692,29 +1692,34 @@ struct cnode *
make_coda_node(CodaFid *fid, struct mount *vfsp, short type)
{
struct cnode *cp;
struct vnode *vp;
int err;
if ((cp = coda_find(fid)) == NULL) {
struct vnode *vp;
cp = coda_alloc();
cp->c_fid = *fid;
err = getnewvnode("coda", vfsp, &coda_vnodeops, &vp);
if (err)
panic("coda: getnewvnode returned error %d\n", err);
/*
* XXX: Too early for mpsafe fs.
*/
err = insmntque1(vp, vfsp, NULL, NULL);
if (err != 0)
panic("coda: insmntque failed: error %d", err);
vp->v_data = cp;
vp->v_type = type;
cp->c_vnode = vp;
coda_save(cp);
} else
/*
* XXXRW: This really needs a moderate amount of reworking. We need
* to properly tolerate failures of getnewvnode() and insmntque(),
* and callers need to be able to accept an error back from
* make_coda_node. There may also be more general issues in how we
* handle forced unmount. Finally, if/when Coda loses its dependency
* on Giant, the ordering of this needs rethinking.
*/
cp = coda_find(fid);
if (cp != NULL) {
vref(CTOV(cp));
return (cp);
}
cp = coda_alloc();
cp->c_fid = *fid;
err = getnewvnode("coda", vfsp, &coda_vnodeops, &vp);
if (err)
panic("coda: getnewvnode returned error %d\n", err);
vp->v_data = cp;
vp->v_type = type;
cp->c_vnode = vp;
coda_save(cp);
err = insmntque(vp, vfsp);
if (err != 0)
printf("coda: insmntque failed: error %d", err);
return (cp);
}