121 static int add_grefs(struct ioctl_gntalloc_alloc_gref *op,  in add_grefs()  argument
129 	readonly = !(op->flags & GNTALLOC_FLAG_WRITABLE);  in add_grefs()
131 	for (i = 0; i < op->count; i++) {  in add_grefs()
138 		gref->file_index = op->index + i * PAGE_SIZE;  in add_grefs()
144 		rc = gnttab_grant_foreign_access(op->domid,  in add_grefs()
161 	gref_size -= (op->count - i);  in add_grefs()
283 	struct ioctl_gntalloc_alloc_gref op;  in gntalloc_ioctl_alloc()  local
288 	if (copy_from_user(&op, arg, sizeof(op))) {  in gntalloc_ioctl_alloc()
293 	gref_ids = kcalloc(op.count, sizeof(gref_ids[0]), GFP_TEMPORARY);  in gntalloc_ioctl_alloc()
305 	if (gref_size + op.count > limit) {  in gntalloc_ioctl_alloc()
310 	gref_size += op.count;  in gntalloc_ioctl_alloc()
311 	op.index = priv->index;  in gntalloc_ioctl_alloc()
312 	priv->index += op.count * PAGE_SIZE;  in gntalloc_ioctl_alloc()
315 	rc = add_grefs(&op, gref_ids, priv);  in gntalloc_ioctl_alloc()
326 	if (copy_to_user(arg, &op, sizeof(op))) {  in gntalloc_ioctl_alloc()
331 			sizeof(gref_ids[0]) * op.count)) {  in gntalloc_ioctl_alloc()
346 	struct ioctl_gntalloc_dealloc_gref op;  in gntalloc_ioctl_dealloc()  local
351 	if (copy_from_user(&op, arg, sizeof(op))) {  in gntalloc_ioctl_dealloc()
357 	gref = find_grefs(priv, op.index, op.count);  in gntalloc_ioctl_dealloc()
363 		for (i = 0; i < op.count; i++) {  in gntalloc_ioctl_dealloc()
384 	struct ioctl_gntalloc_unmap_notify op;  in gntalloc_ioctl_unmap_notify()  local
390 	if (copy_from_user(&op, arg, sizeof(op)))  in gntalloc_ioctl_unmap_notify()
393 	index = op.index & ~(PAGE_SIZE - 1);  in gntalloc_ioctl_unmap_notify()
394 	pgoff = op.index & (PAGE_SIZE - 1);  in gntalloc_ioctl_unmap_notify()
404 	if (op.action & ~(UNMAP_NOTIFY_CLEAR_BYTE|UNMAP_NOTIFY_SEND_EVENT)) {  in gntalloc_ioctl_unmap_notify()
416 	if (op.action & UNMAP_NOTIFY_SEND_EVENT) {  in gntalloc_ioctl_unmap_notify()
417 		if (evtchn_get(op.event_channel_port)) {  in gntalloc_ioctl_unmap_notify()
426 	gref->notify.flags = op.action;  in gntalloc_ioctl_unmap_notify()
428 	gref->notify.event = op.event_channel_port;  in gntalloc_ioctl_unmap_notify()