/*
* Find root of lofs mount.
*/
static int
lo_root(struct vfs *vfsp, struct vnode **vpp)
{
*vpp = vtoli(vfsp)->li_rootvp;
#ifdef LODEBUG
lo_dprint(4, "lo_root(0x%p) = %p\n", vfsp, *vpp);
#endif
/*
* If the root of the filesystem is a special file, return the specvp
* version of the vnode. We don't save the specvp vnode in our
* hashtable since that's exclusively for lnodes.
*/
if (IS_DEVVP(*vpp)) {
struct vnode *svp;
svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, kcred);
if (svp == NULL)
return (ENOSYS);
*vpp = svp;
} else {
VN_HOLD(*vpp);
}
return (0);
}
/* ARGSUSED3 */
static int
xmem_lookup(struct vnode *dvp, char *nm, struct vnode **vpp,
struct pathname *pnp, int flags, struct vnode *rdir, struct cred *cred)
{
struct xmemnode *xp = (struct xmemnode *)VTOXN(dvp);
struct xmemnode *nxp = NULL;
int error;
/*
* Null component name is a synonym for directory being searched.
*/
if (*nm == '\0') {
VN_HOLD(dvp);
*vpp = dvp;
return (0);
}
ASSERT(xp);
error = xdirlookup(xp, nm, &nxp, cred);
if (error == 0) {
ASSERT(nxp);
*vpp = XNTOV(nxp);
/*
* If vnode is a device return special vnode instead
*/
if (IS_DEVVP(*vpp)) {
struct vnode *newvp;
newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type,
cred);
VN_RELE(*vpp);
*vpp = newvp;
}
}
return (error);
}
/*ARGSUSED7*/
static int
xmem_create(struct vnode *dvp, char *nm, struct vattr *vap,
enum vcexcl exclusive, int mode, struct vnode **vpp, struct cred *cred,
int flag)
{
struct xmemnode *parent;
struct xmount *xm;
struct xmemnode *self;
int error;
struct xmemnode *oldxp;
again:
parent = (struct xmemnode *)VTOXN(dvp);
xm = (struct xmount *)VTOXM(dvp);
self = NULL;
error = 0;
oldxp = NULL;
if (vap->va_type == VREG && (vap->va_mode & VSVTX)) {
/* Must be privileged to set sticky bit */
if (secpolicy_vnode_stky_modify(cred) != 0)
vap->va_mode &= ~VSVTX;
} else if (vap->va_type == VNON) {
return (EINVAL);
}
/*
* Null component name is a synonym for directory being searched.
*/
if (*nm == '\0') {
VN_HOLD(dvp);
oldxp = parent;
} else {
error = xdirlookup(parent, nm, &oldxp, cred);
}
if (error == 0) { /* name found */
ASSERT(oldxp);
rw_enter(&oldxp->xn_rwlock, RW_WRITER);
/*
* if create/read-only an existing
* directory, allow it
*/
if (exclusive == EXCL)
error = EEXIST;
else if ((oldxp->xn_type == VDIR) && (mode & VWRITE))
error = EISDIR;
else {
error = xmem_xaccess(oldxp, mode, cred);
}
if (error) {
rw_exit(&oldxp->xn_rwlock);
xmemnode_rele(oldxp);
return (error);
}
*vpp = XNTOV(oldxp);
if ((*vpp)->v_type == VREG && (vap->va_mask & AT_SIZE) &&
vap->va_size == 0) {
rw_enter(&oldxp->xn_contents, RW_WRITER);
(void) xmemnode_trunc(xm, oldxp, 0);
rw_exit(&oldxp->xn_contents);
}
rw_exit(&oldxp->xn_rwlock);
if (IS_DEVVP(*vpp)) {
struct vnode *newvp;
newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type,
cred);
VN_RELE(*vpp);
*vpp = newvp;
}
return (0);
}
if (error != ENOENT)
return (error);
rw_enter(&parent->xn_rwlock, RW_WRITER);
error = xdirenter(xm, parent, nm, DE_CREATE,
(struct xmemnode *)NULL, (struct xmemnode *)NULL,
vap, &self, cred);
rw_exit(&parent->xn_rwlock);
if (error) {
if (self)
xmemnode_rele(self);
if (error == EEXIST) {
/*
* This means that the file was created sometime
* after we checked and did not find it and when
* we went to create it.
* Since creat() is supposed to truncate a file
* that already exits go back to the begining
* of the function. This time we will find it
* and go down the xmem_trunc() path
*/
goto again;
}
return (error);
}
*vpp = XNTOV(self);
if (IS_DEVVP(*vpp)) {
struct vnode *newvp;
newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type,
cred);
VN_RELE(*vpp);
*vpp = newvp;
}
return (0);
}
