Available in udev since version 176.
Version 1.02.71 -
====================================
+ Switch to using built-in blkid in 13-dm-disk.rules.
Add "watch" rule to 13-dm-disk.rules.
Detect failing fifo and skip 20s retry communication period.
Add DM_DEFAULT_NAME_MANGLING_MODE env. variable to override configured value.
ENV{DM_SUSPENDED}=="1", GOTO="dm_end"
-IMPORT{program}="$env{DM_SBIN_PATH}/blkid -o udev -p $tempnode"
+IMPORT{program}="blkid"
ENV{DM_UDEV_LOW_PRIORITY_FLAG}=="1", OPTIONS="link_priority=-100"
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"