/* Create the VM system backing object for this vnode */
int
vnode_create_vobject(struct vnode *vp, off_t isize, struct thread *td)
{
vm_object_t object;
vm_ooffset_t size = isize;
struct vattr va;
if (!vn_isdisk(vp, NULL) && vn_canvmio(vp) == FALSE)
return (0);
while ((object = vp->v_object) != NULL) {
VM_OBJECT_WLOCK(object);
if (!(object->flags & OBJ_DEAD)) {
VM_OBJECT_WUNLOCK(object);
return (0);
}
VOP_UNLOCK(vp, 0);
vm_object_set_flag(object, OBJ_DISCONNECTWNT);
VM_OBJECT_SLEEP(object, object, PDROP | PVM, "vodead", 0);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
}
if (size == 0) {
if (vn_isdisk(vp, NULL)) {
size = IDX_TO_OFF(INT_MAX);
} else {
if (VOP_GETATTR(vp, &va, td->td_ucred))
return (0);
size = va.va_size;
}
}
object = vnode_pager_alloc(vp, size, 0, 0, td->td_ucred);
/*
* Dereference the reference we just created. This assumes
* that the object is associated with the vp.
*/
VM_OBJECT_WLOCK(object);
object->ref_count--;
VM_OBJECT_WUNLOCK(object);
vrele(vp);
KASSERT(vp->v_object != NULL, ("vnode_create_vobject: NULL object"));
return (0);
}
/*
* Enable an EA using the passed file system, backing vnode, attribute name,
* namespace, and proc. Will perform a VOP_OPEN() on the vp, so expects vp
* to be locked when passed in. The vnode will be returned unlocked,
* regardless of success/failure of the function. As a result, the caller
* will always need to vrele(), but not vput().
*/
static int
ufs_extattr_enable_with_open(struct ufsmount *ump, struct vnode *vp,
int attrnamespace, const char *attrname, struct proc *p)
{
int error;
error = VOP_OPEN(vp, FREAD|FWRITE, p->p_ucred, p);
if (error) {
printf("ufs_extattr_enable_with_open.VOP_OPEN(): failed "
"with %d\n", error);
VOP_UNLOCK(vp, 0, p);
return (error);
}
#if 0
/* - XXX */
/*
* XXX: Note, should VOP_CLOSE() if vfs_object_create() fails, but due
* to a similar piece of code in vn_open(), we don't.
*/
if (vn_canvmio(vp) == TRUE)
if ((error = vfs_object_create(vp, p, p->p_ucred)) != 0) {
/*
* XXX: bug replicated from vn_open(): should
* VOP_CLOSE() here.
*/
VOP_UNLOCK(vp, 0, p);
return (error);
}
#endif
vp->v_writecount++;
vref(vp);
VOP_UNLOCK(vp, 0, p);
error = ufs_extattr_enable(ump, attrnamespace, attrname, vp, p);
if (error != 0)
vn_close(vp, FREAD|FWRITE, p->p_ucred, p);
return (error);
}