[package] block-mount: remove explicit lock waits, solves some potential race conditions
[openwrt.git] / package / block-mount / files / fstab.init
1 #!/bin/sh /etc/rc.common
2 # Copyright (C) 2007 OpenWrt.org
3 # Copyright (C) 2010 Vertical Communications
4 # This is free software, licensed under the GNU General Public License v2.
5 # See /LICENSE for more information.
6 #
7
8
9 START=20
10
11 EXTRA_COMMANDS="overlay_enable whole_root_enable"
12 EXTRA_HELP="        overlay_enable    Reenable overlay rootfs. (After you fix it).
13         whole_root_enable Reenable whole-disk rootfs.  (After you fix it)."
14
15 rootfs_enable() {
16         local extroot_type="$1"
17                 
18         if [ ! -d /tmp/${extroot_type}-disabled ]; then
19                 echo "No disabled ${extroot_type} present (/tmp/${extroot_type}-disabled).  Can't renable."
20                 exit 1
21         fi
22         
23         rm -f /tmp/${extroot_type}-disabled/.extroot.md5sum
24         rm -f /tmp/${extroot_type}-disabled/etc/extroot.md5sum
25         echo "Please reboot router to complete re-enabling external rootfs."
26 }
27
28 overlay_enable() {
29         rootfs_enable overlay
30 }
31
32 whole_root_enable() {
33         rootfs_enable whole_root
34 }
35
36 do_mount() {
37         local cfg="$1"
38         config_mount_by_section "$cfg"
39 }
40
41 do_swapon() {
42         local cfg="$1"
43         config_swapon_by_section "$cfg"
44 }
45
46 do_unmount() {
47         local cfg="$1"
48
49         config_get target "$cfg" target
50         config_get_bool enabled "$cfg" "enabled" '1'
51         [ -n "$target" -a "$enabled" -gt 0 ] || return 0
52         umount $target
53 }
54         
55 do_swapoff() {
56         local cfg="$1"
57
58         config_get device "$cfg" device
59         config_get_bool enabled "$cfg" "enabled" '1'
60         [ -n "$device" -a  "$enabled" -gt 0 ] && type swapoff >/dev/null || return 0
61         swapoff $device
62 }
63
64 start() {
65         . /lib/functions/mount.sh
66
67         config_load fstab
68         mkdir -p /var/lock
69         lock /var/lock/fstab.lck
70         [ -e /tmp/fstab ] || {
71                 echo '# WARNING: this is an auto generated file, please use uci to set defined filesystems' > /tmp/fstab
72         }
73         lock -u /var/lock/fstab.lck
74         config_foreach do_swapon swap
75         config_foreach do_mount mount
76         config_foreach do_swapon swap  # do swap a second time so that swap on filesystems is enabled
77 }
78
79 stop() {
80         . /lib/functions/mount.sh
81
82         config_load fstab
83         config_foreach do_unmount mount
84         config_foreach do_swapoff swap
85         swapoff -a
86 }
87
88