Date: Fri, 30 Aug 2013 01:46:56 +0000 (UTC) From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r255051 - head/sys/dev/xen/blkfront Message-ID: <201308300146.r7U1kun3053855@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: cperciva Date: Fri Aug 30 01:46:56 2013 New Revision: 255051 URL: http://svnweb.freebsd.org/changeset/base/255051 Log: If reading a virtual-device value fails, attempt to read a virtual-device-ext value. Some hosts do not publish "extended" disk IDs via virtual-device in an attempt to avoid confusing old blkfront drivers, and without this change we failed to attach such disks. In particular, this commit allows all 24 ephemeral disks on EC2 hs1.8xlarge instances to be used, instead of only the first 15. MFC after: 3 days Modified: head/sys/dev/xen/blkfront/blkfront.c Modified: head/sys/dev/xen/blkfront/blkfront.c ============================================================================== --- head/sys/dev/xen/blkfront/blkfront.c Fri Aug 30 01:45:36 2013 (r255050) +++ head/sys/dev/xen/blkfront/blkfront.c Fri Aug 30 01:46:56 2013 (r255051) @@ -1409,6 +1409,9 @@ xbd_attach(device_t dev) /* FIXME: Use dynamic device id if this is not set. */ error = xs_scanf(XST_NIL, xenbus_get_node(dev), "virtual-device", NULL, "%" PRIu32, &vdevice); + if (error) + error = xs_scanf(XST_NIL, xenbus_get_node(dev), + "virtual-device-ext", NULL, "%" PRIu32, &vdevice); if (error) { xenbus_dev_fatal(dev, error, "reading virtual-device"); device_printf(dev, "Couldn't determine virtual device.\n");
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201308300146.r7U1kun3053855>