Aliases like 'mpatha' and 'mpathb' can cange between boots (or when new
devices are connected/disconnected from the system), just like with 'sda'
and 'sdb'. What is called for is being able to target a specific multipath
by its ID. This is achieved by allowing the user to specify a member
device of a multipath ('sda', or through /dev/disk/by-id/) and then
promoting it to the multipath device.

For example, commands like:

ignoredisk ... --only-use=disk/by-id/scsi-<wwid>
part ... --ondisk=disk/by-id/scsi-<wwid>

will make the mpath and the member drives with wwid <wwid> listed in
exclusiveDisks and create a partition on the same mpath.

Resolves: rhbz#677263
Related: rhbz#709653
---
kickstart.py | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/kickstart.py b/kickstart.py
index 0e89fdb..9a1536a 100644
--- a/kickstart.py
+++ b/kickstart.py
@@ -57,6 +57,7 @@ _ = lambda x: gettext.ldgettext("anaconda", x)

import logging
log = logging.getLogger("anaconda")
+storage_log = logging.getLogger("storage")
stdoutLog = logging.getLogger("anaconda.stdout")
from anaconda_log import logger, logLevelMap, setHandlersLevel

@@ -205,10 +206,11 @@ def deviceMatches(spec):
# now see if any mpaths and mpath members match
for members in multipaths:
mpath_name = udev_device_get_multipath_name(members[0])
- if mpath_name == spec:
- # append the mpath
+ member_names = map(udev_device_get_name, members)
+ if mpath_name == spec or (dev in member_names):
+ # append the entire mpath
matches.append(mpath_name)
- matches.extend(map(udev_device_get_name, members))
+ matches.extend(member_names)

return matches

@@ -796,6 +798,12 @@ class PartitionData(commands.partition.F12_PartData):
names = [self.disk, "mapper/" + self.disk]
for n in names:
disk = devicetree.getDeviceByName(udev_resolve_devspec(n) )
+ # if this is a multipath member promote it to the real mpath
+ if disk and disk.format.type == "multipath_member":
+ mpath_device = storage.devicetree.getChildren(disk)[0]
+ storage_log.info("kickstart: part: promoting %s to %s"
+ % (disk.name, mpath_device.name))
+ disk = mpath_device
if not disk:
raise KickstartValueError, formatErrorMsg(self.lineno, msg="Specified nonexistent disk %s in partition command" % n)

--
1.7.3.3

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