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| 1 #!/bin/bash | |
| 2 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved. | |
| 3 # Use of this source code is governed by a BSD-style license that can be | |
| 4 # found in the LICENSE file. | |
| 5 | |
| 6 set -e # exit on error | |
| 7 set -E # force error handler inheritance | |
| 8 set -u # require all variables to be defined | |
| 9 trap error_handler ERR; | |
| 10 | |
| 11 function error_handler() { | |
| 12 cryptohome::log "unmount failed: the system may be rebooted" | |
| 13 $sync || $true | |
| 14 | |
| 15 cryptohome::log "lsof ${DEFAULT_MOUNT_POINT}: $(lsof ${DEFAULT_MOUNT_POINT})" | |
| 16 cryptohome::log "current mount table: $(mount)" | |
| 17 | |
| 18 cryptohome::is_mounted && $reboot | |
| 19 cryptohome::log "unmount but the filesystem is no longer mounted" | |
| 20 | |
| 21 # Make sure we aren't leaving a mess or an accessible key. | |
| 22 if cryptohome::is_opened; then | |
| 23 cryptohome::log "device mapper device still present; attempting to close" | |
| 24 cryptohome::log \ | |
| 25 "lsof ${DEFAULT_MAPPER_DEVICE}: $(lsof ${DEFAULT_MAPPER_DEVICE})" | |
| 26 cryptohome::close || $reboot | |
| 27 $exit 1 | |
| 28 fi | |
| 29 | |
| 30 if cryptohome::attached; then | |
| 31 cryptohome::log "loop device still present; attempting to detach" | |
| 32 cryptohome::detach || $reboot | |
| 33 $exit 1 | |
| 34 fi | |
| 35 | |
| 36 cryptohome::log "forced unmount and cleanup successful" | |
| 37 $exit 0 | |
| 38 } | |
| 39 | |
| 40 function umount_main() { | |
| 41 # If we can't unmount, do it the hard way, for now. | |
| 42 local target="${1:-$DEFAULT_MOUNT_POINT}" | |
| 43 # Variables that define how long to wait for unmount to complete and the | |
| 44 # increment to check for its completion. | |
| 45 local max_delay=20 | |
| 46 local current_delay=0 | |
| 47 local increment=1 | |
| 48 | |
| 49 # Loop until we've unmounted cryptohome or have reached the $max_delay. | |
| 50 while cryptohome::is_mounted "$target" ; do | |
| 51 if [ $current_delay -ge $max_delay ] ; then | |
| 52 # If we've reached a max_delay, abort and go through reboot logic | |
| 53 cryptohome::log "Unmount max delay reached. Aborting." | |
| 54 error_handler | |
| 55 fi | |
| 56 if ! cryptohome::unmount "$target" ; then | |
| 57 cryptohome::log "Unmount error, sleeping and attempting to unmount again" | |
| 58 $sync && $sleep $increment | |
| 59 current_delay=$(( current_delay + increment )) | |
| 60 fi | |
| 61 done | |
| 62 # is_mounted ignores incognito mounts since they diverge from | |
| 63 # the actual cryptohome landscape (dm, losetup). | |
| 64 if $mount | $grep -q "^$INCOGNITO_MOUNT_NAME "; then | |
| 65 # We want all processes killed that use this mountpoint, but | |
| 66 # we also need to ensure that the user is completely gone to | |
| 67 # avoid processes persisting across mounts. | |
| 68 cryptohome::log "unmounting incognito mount" | |
| 69 $pkill -9 -u ${DEFAULT_USER} && $true &> /dev/null | |
| 70 # Since we don't have additional work after the unmount, we can | |
| 71 # do it lazily. | |
| 72 $umount -n -l "$INCOGNITO_MOUNT_NAME" | |
| 73 fi | |
| 74 } | |
| 75 | |
| 76 if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then | |
| 77 source "$(dirname "$0")/../lib/chromeos-cryptohome/common" | |
| 78 utils::declare_commands reboot exit sync | |
| 79 umount_main "$@" | |
| 80 fi | |
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