1#!/bin/sh 2# 3# Track changes to enumerated pools for use in early-boot 4set -ef 5 6FSLIST_DIR="@sysconfdir@/zfs/zfs-list.cache" 7FSLIST_TMP="@runstatedir@/zfs-list.cache.new" 8FSLIST="${FSLIST_DIR}/${ZEVENT_POOL}" 9 10# If the pool specific cache file is not writeable, abort 11[ -w "${FSLIST}" ] || exit 0 12 13[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc" 14. "${ZED_ZEDLET_DIR}/zed-functions.sh" 15 16zed_exit_if_ignoring_this_event 17zed_check_cmd "${ZFS}" sort diff grep 18 19# If we are acting on a snapshot, we have nothing to do 20printf '%s' "${ZEVENT_HISTORY_DSNAME}" | grep '@' && exit 0 21 22# We obtain a lock on zfs-list to avoid any simultaneous writes. 23# If we run into trouble, log and drop the lock 24abort_alter() { 25 zed_log_msg "Error updating zfs-list.cache!" 26 zed_unlock zfs-list 27} 28 29finished() { 30 zed_unlock zfs-list 31 trap - EXIT 32 exit 0 33} 34 35case "${ZEVENT_HISTORY_INTERNAL_NAME}" in 36 create|"finish receiving"|import|destroy|rename) 37 ;; 38 39 export) 40 zed_lock zfs-list 41 trap abort_alter EXIT 42 echo > "${FSLIST}" 43 finished 44 ;; 45 46 set|inherit) 47 # Only act if one of the tracked properties is altered. 48 case "${ZEVENT_HISTORY_INTERNAL_STR%%=*}" in 49 canmount|mountpoint|atime|relatime|devices|exec|readonly| \ 50 setuid|nbmand|encroot|keylocation|org.openzfs.systemd:requires| \ 51 org.openzfs.systemd:requires-mounts-for| \ 52 org.openzfs.systemd:before|org.openzfs.systemd:after| \ 53 org.openzfs.systemd:wanted-by|org.openzfs.systemd:required-by| \ 54 org.openzfs.systemd:nofail|org.openzfs.systemd:ignore \ 55 ) ;; 56 *) exit 0 ;; 57 esac 58 ;; 59 60 *) 61 # Ignore all other events. 62 exit 0 63 ;; 64esac 65 66zed_lock zfs-list 67trap abort_alter EXIT 68 69PROPS="name,mountpoint,canmount,atime,relatime,devices,exec\ 70,readonly,setuid,nbmand,encroot,keylocation\ 71,org.openzfs.systemd:requires,org.openzfs.systemd:requires-mounts-for\ 72,org.openzfs.systemd:before,org.openzfs.systemd:after\ 73,org.openzfs.systemd:wanted-by,org.openzfs.systemd:required-by\ 74,org.openzfs.systemd:nofail,org.openzfs.systemd:ignore" 75 76"${ZFS}" list -H -t filesystem -o $PROPS -r "${ZEVENT_POOL}" > "${FSLIST_TMP}" 77 78# Sort the output so that it is stable 79sort "${FSLIST_TMP}" -o "${FSLIST_TMP}" 80 81# Don't modify the file if it hasn't changed 82diff -q "${FSLIST_TMP}" "${FSLIST}" || mv "${FSLIST_TMP}" "${FSLIST}" 83rm -f "${FSLIST_TMP}" 84 85finished 86