27856be8a4
xend-devid-or-name.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=77
94 lines
4.2 KiB
Diff
94 lines
4.2 KiB
Diff
Allow multiple bootloader loopback devices
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Starting several domains concurrently can fail due to using a single
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bootloader loopback device. This patch creates a list of bootloader
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loopback devices so more than one instance of bootloader can be run
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concurrently.
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Index: xen-4.0.1-testing/tools/python/xen/util/blkif.py
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===================================================================
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--- xen-4.0.1-testing.orig/tools/python/xen/util/blkif.py
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+++ xen-4.0.1-testing/tools/python/xen/util/blkif.py
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@@ -19,11 +19,6 @@ def blkdev_name_to_number(name):
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devname = 'virtual-device'
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devnum = None
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- try:
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- return (devname, os.stat(n).st_rdev)
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- except Exception, ex:
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- pass
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-
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scsi_major = [ 8, 65, 66, 67, 68, 69, 70, 71, 128, 129, 130, 131, 132, 133, 134, 135 ]
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if re.match( '/dev/sd[a-z]([1-9]|1[0-5])?$', n):
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major = scsi_major[(ord(n[7:8]) - ord('a')) / 16]
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Index: xen-4.0.1-testing/tools/python/xen/xend/XendDomainInfo.py
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===================================================================
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--- xen-4.0.1-testing.orig/tools/python/xen/xend/XendDomainInfo.py
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+++ xen-4.0.1-testing/tools/python/xen/xend/XendDomainInfo.py
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@@ -73,7 +73,7 @@ from xen.xend.XendPSCSI import XendPSCSI
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from xen.xend.XendDSCSI import XendDSCSI, XendDSCSI_HBA
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MIGRATE_TIMEOUT = 30.0
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-BOOTLOADER_LOOPBACK_DEVICE = '/dev/xvdp'
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+BOOTLOADER_LOOPBACK_DEVICES = ['/dev/xvd' + chr(x) for x in range(ord('z'), ord('d'), -1)]
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xc = xen.lowlevel.xc.xc()
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xoptions = XendOptions.instance()
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@@ -3314,20 +3314,27 @@ class XendDomainInfo:
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# This is a file, not a device. pygrub can cope with a
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# file if it's raw, but if it's QCOW or other such formats
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# used through blktap, then we need to mount it first.
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-
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- log.info("Mounting %s on %s." %
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- (fn, BOOTLOADER_LOOPBACK_DEVICE))
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-
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- vbd = {
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- 'mode': 'RW',
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- 'device': BOOTLOADER_LOOPBACK_DEVICE,
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- }
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-
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- from xen.xend import XendDomain
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- dom0 = XendDomain.instance().privilegedDomain()
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- vbd_uuid = dom0.create_vbd(vbd, disk)
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- dom0._waitForDeviceFrontUUID(vbd_uuid)
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- fn = BOOTLOADER_LOOPBACK_DEVICE
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+ # Try all possible loopback_devices
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+ for loopback_device in BOOTLOADER_LOOPBACK_DEVICES:
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+ log.info("Mounting %s on %s." % (fn, loopback_device))
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+ vbd = { 'mode' : 'RW', 'device' : loopback_device, }
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+ try:
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+ from xen.xend import XendDomain
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+ dom0 = XendDomain.instance().privilegedDomain()
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+ vbd_uuid = dom0.create_vbd(vbd, disk)
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+ dom0._waitForDeviceFrontUUID(vbd_uuid)
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+ fn = loopback_device
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+ break
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+ except VmError, e:
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+ if str(e).find('already connected.') != -1:
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+ continue
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+ elif str(e).find('isn\'t accessible') != -1:
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+ dom0.destroyDevice('vbd', loopback_device, force = True, rm_cfg = True)
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+ continue
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+ else:
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+ raise
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+ else:
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+ raise
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try:
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blcfg = bootloader(blexec, fn, self, False,
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@@ -3335,11 +3342,11 @@ class XendDomainInfo:
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finally:
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if mounted:
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log.info("Unmounting %s from %s." %
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- (fn, BOOTLOADER_LOOPBACK_DEVICE))
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+ (fn, loopback_device))
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if devtype in ['tap', 'tap2']:
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- dom0.destroyDevice('tap', BOOTLOADER_LOOPBACK_DEVICE, rm_cfg = True)
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+ dom0.destroyDevice('tap', loopback_device, rm_cfg = True)
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else:
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- dom0.destroyDevice('vbd', BOOTLOADER_LOOPBACK_DEVICE, rm_cfg = True)
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+ dom0.destroyDevice('vbd', loopback_device, rm_cfg = True)
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if blcfg is None:
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msg = "Had a bootloader specified, but can't find disk"
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