86 	int err;  in xen_update_blkif_status()  local
102 	err = blkback_name(blkif, name);  in xen_update_blkif_status()
103 	if (err) {  in xen_update_blkif_status()
104 		xenbus_dev_error(blkif->be->dev, err, "get blkback dev name");  in xen_update_blkif_status()
108 	err = filemap_write_and_wait(blkif->vbd.bdev->bd_inode->i_mapping);  in xen_update_blkif_status()
109 	if (err) {  in xen_update_blkif_status()
110 		xenbus_dev_error(blkif->be->dev, err, "block flush");  in xen_update_blkif_status()
117 		err = PTR_ERR(blkif->xenblkd);  in xen_update_blkif_status()
119 		xenbus_dev_error(blkif->be->dev, err, "start xenblkd");  in xen_update_blkif_status()
204 	int err;  in xen_blkif_map()  local
210 	err = xenbus_map_ring_valloc(blkif->be->dev, &gref, 1,  in xen_blkif_map()
212 	if (err < 0)  in xen_blkif_map()
213 		return err;  in xen_blkif_map()
241 	err = bind_interdomain_evtchn_to_irqhandler(blkif->domid, evtchn,  in xen_blkif_map()
244 	if (err < 0) {  in xen_blkif_map()
247 		return err;  in xen_blkif_map()
249 	blkif->irq = err;  in xen_blkif_map()
493 	int err;  in xen_blkbk_flush_diskcache()  local
495 	err = xenbus_printf(xbt, dev->nodename, "feature-flush-cache",  in xen_blkbk_flush_diskcache()
497 	if (err)  in xen_blkbk_flush_diskcache()
498 		dev_warn(&dev->dev, "writing feature-flush-cache (%d)", err);  in xen_blkbk_flush_diskcache()
500 	return err;  in xen_blkbk_flush_diskcache()
507 	int err;  in xen_blkbk_discard()  local
512 	err = xenbus_scanf(XBT_NIL, dev->nodename, "discard-enable", "%d",  in xen_blkbk_discard()
514 	if (err == 1 && !discard_enable)  in xen_blkbk_discard()
518 		err = xenbus_printf(xbt, dev->nodename,  in xen_blkbk_discard()
521 		if (err) {  in xen_blkbk_discard()
522 			dev_warn(&dev->dev, "writing discard-granularity (%d)", err);  in xen_blkbk_discard()
525 		err = xenbus_printf(xbt, dev->nodename,  in xen_blkbk_discard()
528 		if (err) {  in xen_blkbk_discard()
529 			dev_warn(&dev->dev, "writing discard-alignment (%d)", err);  in xen_blkbk_discard()
534 		err = xenbus_printf(xbt, dev->nodename,  in xen_blkbk_discard()
537 		if (err) {  in xen_blkbk_discard()
538 			dev_warn(&dev->dev, "writing discard-secure (%d)", err);  in xen_blkbk_discard()
542 	err = xenbus_printf(xbt, dev->nodename, "feature-discard",  in xen_blkbk_discard()
544 	if (err)  in xen_blkbk_discard()
545 		dev_warn(&dev->dev, "writing feature-discard (%d)", err);  in xen_blkbk_discard()
551 	int err;  in xen_blkbk_barrier()  local
553 	err = xenbus_printf(xbt, dev->nodename, "feature-barrier",  in xen_blkbk_barrier()
555 	if (err)  in xen_blkbk_barrier()
556 		dev_warn(&dev->dev, "writing feature-barrier (%d)", err);  in xen_blkbk_barrier()
558 	return err;  in xen_blkbk_barrier()
569 	int err;  in xen_blkbk_probe()  local
586 		err = PTR_ERR(be->blkif);  in xen_blkbk_probe()
588 		xenbus_dev_fatal(dev, err, "creating block interface");  in xen_blkbk_probe()
595 	err = xenbus_watch_pathfmt(dev, &be->backend_watch, backend_changed,  in xen_blkbk_probe()
597 	if (err)  in xen_blkbk_probe()
600 	err = xenbus_switch_state(dev, XenbusStateInitWait);  in xen_blkbk_probe()
601 	if (err)  in xen_blkbk_probe()
609 	return err;  in xen_blkbk_probe()
621 	int err;  in backend_changed()  local
633 	err = xenbus_scanf(XBT_NIL, dev->nodename, "physical-device", "%x:%x",  in backend_changed()
635 	if (XENBUS_EXIST_ERR(err)) {  in backend_changed()
643 	if (err != 2) {  in backend_changed()
644 		xenbus_dev_fatal(dev, err, "reading physical-device");  in backend_changed()
657 		err = PTR_ERR(be->mode);  in backend_changed()
659 		xenbus_dev_fatal(dev, err, "reading mode");  in backend_changed()
670 	err = kstrtoul(strrchr(dev->otherend, '/') + 1, 0, &handle);  in backend_changed()
671 	if (err)  in backend_changed()
677 	err = xen_vbd_create(be->blkif, handle, major, minor,  in backend_changed()
680 	if (err)  in backend_changed()
681 		xenbus_dev_fatal(dev, err, "creating vbd structure");  in backend_changed()
683 		err = xenvbd_sysfs_addif(dev);  in backend_changed()
684 		if (err) {  in backend_changed()
686 			xenbus_dev_fatal(dev, err, "creating sysfs entries");  in backend_changed()
690 	if (err) {  in backend_changed()
709 	int err;  in frontend_changed()  local
735 		err = xen_blkif_disconnect(be->blkif);  in frontend_changed()
736 		if (err) {  in frontend_changed()
737 			xenbus_dev_fatal(dev, err, "pending I/O");  in frontend_changed()
741 		err = connect_ring(be);  in frontend_changed()
742 		if (err)  in frontend_changed()
780 	int err;  in connect()  local
787 	err = xenbus_transaction_start(&xbt);  in connect()
788 	if (err) {  in connect()
789 		xenbus_dev_fatal(dev, err, "starting transaction");  in connect()
800 	err = xenbus_printf(xbt, dev->nodename, "feature-persistent", "%u", 1);  in connect()
801 	if (err) {  in connect()
802 		xenbus_dev_fatal(dev, err, "writing %s/feature-persistent",  in connect()
806 	err = xenbus_printf(xbt, dev->nodename, "feature-max-indirect-segments", "%u",  in connect()
808 	if (err)  in connect()
810 			 dev->nodename, err);  in connect()
812 	err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu",  in connect()
814 	if (err) {  in connect()
815 		xenbus_dev_fatal(dev, err, "writing %s/sectors",  in connect()
821 	err = xenbus_printf(xbt, dev->nodename, "info", "%u",  in connect()
824 	if (err) {  in connect()
825 		xenbus_dev_fatal(dev, err, "writing %s/info",  in connect()
829 	err = xenbus_printf(xbt, dev->nodename, "sector-size", "%lu",  in connect()
832 	if (err) {  in connect()
833 		xenbus_dev_fatal(dev, err, "writing %s/sector-size",  in connect()
837 	err = xenbus_printf(xbt, dev->nodename, "physical-sector-size", "%u",  in connect()
839 	if (err)  in connect()
840 		xenbus_dev_error(dev, err, "writing %s/physical-sector-size",  in connect()
843 	err = xenbus_transaction_end(xbt, 0);  in connect()
844 	if (err == -EAGAIN)  in connect()
846 	if (err)  in connect()
847 		xenbus_dev_fatal(dev, err, "ending transaction");  in connect()
849 	err = xenbus_switch_state(dev, XenbusStateConnected);  in connect()
850 	if (err)  in connect()
851 		xenbus_dev_fatal(dev, err, "%s: switching to Connected state",  in connect()
867 	int err;  in connect_ring()  local
871 	err = xenbus_gather(XBT_NIL, dev->otherend, "ring-ref", "%lu",  in connect_ring()
873 	if (err) {  in connect_ring()
874 		xenbus_dev_fatal(dev, err,  in connect_ring()
877 		return err;  in connect_ring()
881 	err = xenbus_gather(XBT_NIL, dev->otherend, "protocol",  in connect_ring()
883 	if (err)  in connect_ring()
892 		xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);  in connect_ring()
895 	err = xenbus_gather(XBT_NIL, dev->otherend,  in connect_ring()
898 	if (err)  in connect_ring()
909 	err = xen_blkif_map(be->blkif, ring_ref, evtchn);  in connect_ring()
910 	if (err) {  in connect_ring()
911 		xenbus_dev_fatal(dev, err, "mapping ring-ref %lu port %u",  in connect_ring()
913 		return err;  in connect_ring()