dracut/modules.d/90mdraid/65-md-incremental-imsm.rules

# This file causes block devices with Linux RAID (mdadm) signatures to
# automatically cause mdadm to be run.
# See udev(8) for syntax

ACTION!="add|change", GOTO="md_end"
SUBSYSTEM!="block", GOTO="md_end"
ENV{rd_NO_MD}=="?*", GOTO="md_end"
KERNEL=="md*", ENV{ID_FS_TYPE}!="linux_raid_member", GOTO="md_end"
KERNEL=="md*", ACTION!="change", GOTO="md_end"

# Also don't process disks that are slated to be a multipath device
ENV{DM_MULTIPATH_DEVICE_PATH}=="?*", GOTO="md_end"

ENV{ID_FS_TYPE}=="ddf_raid_member|isw_raid_member|linux_raid_member", GOTO="md_try"
GOTO="md_end"

LABEL="md_try"
ENV{ID_FS_TYPE}=="isw_raid_member", ENV{rd_NO_MDIMSM}=="?*", GOTO="md_end"
ENV{ID_FS_TYPE}=="ddf_raid_member", ENV{rd_NO_MDDDF}=="?*", GOTO="md_end"

# already done ?
PROGRAM="/bin/sh -c 'for i in $sys/$devpath/holders/md[0-9_]*; do [ -e $$i ] && exit 0; done; exit 1;' ", \
    GOTO="md_end"

# for native arrays - array's uuid has to be specified
# for containers - container's uuid has to be specified
# TODO : how to get embedded array's uuid having container's component ?
#
# UUID CHECK

ENV{DEVTYPE}!="partition", \
    RUN+="/sbin/partx -d --nr 1-1024 $env{DEVNAME}"

RUN+="/sbin/initqueue --timeout --name 50-mdraid_start --onetime --unique /sbin/mdraid_start"

#
# Incrementally build the md array; this will automatically assemble
# any eventual containers as well (imsm, ddf)
#
LABEL="md_incremental"

RUN+="/sbin/mdadm $env{rd_MD_OFFROOT} -I $env{DEVNAME}"

LABEL="md_end"