When creating symlink of a md raid device, the detailed information of
component disks are unnecessary for rule udev-md-raid-arrays.rules. For
md raid devices with huge number of component disks (e.g. 1500 DASD
disks), the detail information of component devices can be very large
and exceed udev monitor's on-stack message buffer.
This patch adds '--no-devices' option when calling mdadm by,
IMPORT{program}="BINDIR/mdadm --detail --no-devices --export $devnode"
Now the detailed output won't include component disks information,
and the error message "invalid message length" reported by systemd can
be removed.
Signed-off-by: Coly Li <colyli@xxxxxxx>
Cc: Neil Brown <<neilb@xxxxxxxx>
---
udev-md-raid-arrays.rules | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/udev-md-raid-arrays.rules b/udev-md-raid-arrays.rules
index 5b99d58..d391665 100644
--- a/udev-md-raid-arrays.rules
+++ b/udev-md-raid-arrays.rules
@@ -17,7 +17,7 @@ TEST!="md/array_state", ENV{SYSTEMD_READY}="0", GOTO="md_end"
ATTR{md/array_state}=="|clear|inactive", ENV{SYSTEMD_READY}="0", GOTO="md_end"
LABEL="md_ignore_state"
-IMPORT{program}="BINDIR/mdadm --detail --export $devnode"
+IMPORT{program}="BINDIR/mdadm --detail --no-devices --export $devnode"
ENV{DEVTYPE}=="disk", ENV{MD_NAME}=="?*", SYMLINK+="disk/by-id/md-name-$env{MD_NAME}", OPTIONS+="string_escape=replace"
ENV{DEVTYPE}=="disk", ENV{MD_UUID}=="?*", SYMLINK+="disk/by-id/md-uuid-$env{MD_UUID}"
ENV{DEVTYPE}=="disk", ENV{MD_DEVNAME}=="?*", SYMLINK+="md/$env{MD_DEVNAME}"
--
2.16.4
