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	"max_request_size", CTLFLAG_RD, &xbd->xbd_max_request_size, 0,			"max_request_size", CTLFLAG_RD, &xbd->xbd_max_request_size, 0,
	"maximum size in bytes of a request (negotiated)");			"maximum size in bytes of a request (negotiated)");

	SYSCTL_ADD_UINT(sysctl_ctx, children, OID_AUTO,			SYSCTL_ADD_UINT(sysctl_ctx, children, OID_AUTO,
	"ring_pages", CTLFLAG_RD, &xbd->xbd_ring_pages, 0,			"ring_pages", CTLFLAG_RD, &xbd->xbd_ring_pages, 0,
	"communication channel pages (negotiated)");			"communication channel pages (negotiated)");

	SYSCTL_ADD_PROC(sysctl_ctx, children, OID_AUTO,			SYSCTL_ADD_PROC(sysctl_ctx, children, OID_AUTO,
	"features", CTLTYPE_STRING\|CTLFLAG_RD, xbd, 0,			"features",
				CTLTYPE_STRING \| CTLFLAG_RD \| CTLFLAG_NEEDGIANT, xbd, 0,
	xbd_sysctl_features, "A", "protocol features (negotiated)");			xbd_sysctl_features, "A", "protocol features (negotiated)");
	}			}

	/*			/*
	* Translate Linux major/minor to an appropriate name and unit			* Translate Linux major/minor to an appropriate name and unit
	* number. For HVM guests, this allows us to use the same drive names			* number. For HVM guests, this allows us to use the same drive names
	* with blkfront as the emulated drives, easing transition slightly.			* with blkfront as the emulated drives, easing transition slightly.
	*/			*/
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