There is currently no way to override dracut's preference for
/dev/mapper device names. But using these is problematic in
different scenarios: For example, if a user has a multipath-
enabled system but wants to disable multipath, or if the
names of multipath maps change because of configuration changes
(e.g. toggling user_friendly_names in /etc/multipath.conf).
This patch makes dracut prefer the user-specified
--persistent_policy names over /dev/mapper names.
It might be worthwhile to discuss why dracut prefers /dev/mapper
of /dev/disk/by-uuid at all. This preference was introduced
in 9037b63e with the argument "dm devices maintain /dev/mapper/* as
persistent names", but that's wrong for the scenarios mentioned
above, and is not a compelling reason for preferring /dev/mapper
over /dev/disk/by-uuid.
Signed-off-by: Martin Wilck <mwilck@xxxxxxx>
---
dracut-functions.sh | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/dracut-functions.sh b/dracut-functions.sh
index 249d8fb..e97765d 100755
--- a/dracut-functions.sh
+++ b/dracut-functions.sh
@@ -223,14 +223,20 @@ get_devpath_block() {
# get a persistent path from a device
get_persistent_dev() {
- local i _tmp _dev
+ local i _tmp _dev _pol
_dev=$(get_maj_min "$1")
[ -z "$_dev" ] && return
+ if [[ -n "$persistent_policy" ]]; then
+ _pol="/dev/disk/${persistent_policy}/*"
+ else
+ _pol=
+ fi
+
for i in \
+ $_pol \
/dev/mapper/* \
- /dev/disk/${persistent_policy:-by-uuid}/* \
/dev/disk/by-uuid/* \
/dev/disk/by-label/* \
/dev/disk/by-partuuid/* \
--
2.10.0
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