d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

If reading a virtual-device value fails, attempt to read a virtual-device-ext

Browse Source 
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  Some hosts do not publish "extended" disk IDs via virtual-device in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
This commit is contained in:
Colin Percival 2013-08-30 01:46:56 +00:00
parent 1458bff9a4
commit 48a1ceed53
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sys/dev/xen/blkfront/blkfront.c
View File

@ -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");