blob: 9e094b75ddc947aeb01eb494eeece3ae62126417 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
#!/sbin/openrc-run
# script that will mount image with modules
depend() {
need dev
before checkfs fsck hwdrivers modules hwclock
keyword novserver nolxc
}
# read kernel options
init_KOPT() {
eval set -- $(cat /proc/cmdline 2>/dev/null)
# in case syslinux does not set BOOT_IMAGE
KOPT_BOOT_IMAGE="${1}"
for opt; do
case "$opt" in
alpine_dev=*|modloop=*|BOOT_IMAGE=*)
eval "KOPT_${opt%%=*}='${opt#*=}'" ;;
esac
done
}
resolve_dev() {
case "$1" in
UUID=*|LABEL=*) findfs "$1";;
*) readlink -f "$1";;
esac
}
find_mnt() {
local search_dev="$1" fstab="$2"
local dev mnt fs mntopts chk
case "$search_dev" in
UUID=*|LABEL=*|/dev/*);;
nfs) search_dev="${KOPT_alpine_dev#nfs:}";;
*) search_dev=/dev/$search_dev;;
esac
local search_real_dev=$(resolve_dev $search_dev)
while read dev mnt fs mntopts chk; do
local real_dev=$(resolve_dev $dev)
local i j
for i in "$search_dev" "$search_real_dev"; do
[ -z "$i" ] && continue
for j in "$dev" "$real_dev"; do
[ -z "$j" ] && continue
if [ "$i" = "$j" ]; then
echo "$mnt"
return
fi
done
done
done < $fstab 2>/dev/null
}
# initialies: alpine_dev, alpine_mnt, alpine_fs, alpine_mounted
find_media() {
init_KOPT
[ -z "$KOPT_alpine_dev" ] && return 0
alpine_mounted=
alpine_dev=${KOPT_alpine_dev%%:*}
alpine_fs=${KOPT_alpine_dev#*:}
[ "$alpine_fs" = "$KOPT_alpine_dev" ] && unset alpine_fs
# first we check if alpine_dev is mounted and use this
alpine_mnt=$(find_mnt $alpine_dev /proc/mounts)
if [ -z "$alpine_mnt" ]; then
# then we check fstab
alpine_mnt=$(find_mnt $alpine_dev /etc/fstab)
else
alpine_mounted=yes
fi
# finally we fallback to /media/<devicename>
[ -z "$alpine_mnt" ] && alpine_mnt=/media/$alpine_dev
}
start() {
local modloop= mount_opts= modloop_dldir="/lib"
find_media
case "$KOPT_modloop" in
http://*|https://|ftp://*)
wget -P "$modloop_dldir" "$KOPT_modloop" \
&& modloop=$modloop_dldir/$(basename $KOPT_modloop)
;;
*)
if [ -z "$alpine_dev" ]; then
return 0
fi
if [ -z "$alpine_mounted" ]; then
ebegin "Mounting $alpine_mnt"
[ -n "$alpine_fs" ] && mount_opts="-t $alpine_fs"
mount $mount_opts /dev/$alpine_dev $alpine_mnt 2>/dev/null
eend $? || return 1
fi
bootimagedir=${KOPT_BOOT_IMAGE%/*}
bootdir=${alpine_mnt}${bootimagedir}
kver=$(uname -r)
case $kver in
*-rc[0-9]) kflavor=vanilla;;
*-[a-z]*) kflavor=${kver##*-};;
*) kflavor=vanilla;;
esac
for modloop in ${alpine_mnt}$KOPT_modloop \
${bootdir}/modloop-$kver \
${bootdir}/modloop-$kflavor \
${bootdir}/modloop \
${alpine_mnt}/boot/modloop-$kver \
${alpine_mnt}/boot/modloop-$kflavor \
${alpine_mnt}/boot/modloop \
${alpine_mnt}$KOPT_BOOT_IMAGE.modloop.*; do
[ -f "$modloop" -o -n "$KOPT_modloop" ] && break
done
;;
esac
ebegin "Mounting modloop $modloop"
mkdir -p /.modloop /lib
mount -o loop,ro $fs_opt $modloop /.modloop
eend $? || return 1
#use unionfs is available and configured
if grep -q -w "unionfs$" /proc/filesystems && [ -n "$unionfs_size" ]; then
ebegin "UnionFS detected. Mounting modloop rw"
mkdir -p /.modunisonfs/modules /lib/modules
mount -t tmpfs -o size="$unionfs_size" tmpfs /.modunisonfs/modules
mount -t unionfs -o dirs=/.modunisonfs/modules=rw:/.modloop/modules=ro unionfs /lib/modules
eend $? || return 1
else
rm -rf /lib/modules && ln -sf /.modloop/modules /lib/
fi
# copy firmware if there are any
if [ -d $alpine_mnt/firmware ]; then
ebegin "Copying firmware from $alpine_mnt/firmware"
cp -R -a $alpine_mnt/firmware /lib/
eend $?
elif [ -d /lib/modules/firmware ]; then
rmdir /lib/firmware 2>/dev/null \
&& ln -s /lib/modules/firmware /lib/
fi
return 0
}
stop() {
local rc=0
find_media
[ -z "$alpine_dev" ] && return 0
if mountinfo --quiet /.modloop; then
ebegin "Unmounting /.modloop"
umount -d /.modloop
eend $? || return 1
fi
if mountinfo --quiet $alpine_mnt; then
ebegin "Unmounting $alpine_mnt"
umount $alpine_mnt
eend $?
fi
}
|
