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
|
#
# Copyright OpenEmbedded Contributors
#
# SPDX-License-Identifier: MIT
#
# Class for setting up /etc in overlayfs
#
# In order to have /etc directory in overlayfs a special handling at early boot stage is required
# The idea is to supply a custom init script that mounts /etc before launching actual init program,
# because the latter already requires /etc to be mounted
#
# The configuration must be machine specific. You should at least set these three variables:
# OVERLAYFS_ETC_MOUNT_POINT ?= "/data"
# OVERLAYFS_ETC_FSTYPE ?= "ext4"
# OVERLAYFS_ETC_DEVICE ?= "/dev/mmcblk0p2"
#
# To control more mount options you should consider setting mount options:
# OVERLAYFS_ETC_MOUNT_OPTIONS ?= "defaults"
#
# The class provides two options for /sbin/init generation
# 1. Default option is to rename original /sbin/init to /sbin/init.orig and place generated init under
# original name, i.e. /sbin/init. It has an advantage that you won't need to change any kernel
# parameters in order to make it work, but it poses a restriction that package-management can't
# be used, becaause updating init manager would remove generated script
# 2. If you are would like to keep original init as is, you can set
# OVERLAYFS_ETC_USE_ORIG_INIT_NAME = "0"
# Then generated init will be named /sbin/preinit and you would need to extend you kernel parameters
# manually in your bootloader configuration.
#
# Regardless which mode you choose, update and migration strategy of configuration files under /etc
# overlay is out of scope of this class
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "overlayfs-etc", "create_overlayfs_etc_preinit;", "", d)}'
IMAGE_FEATURES_CONFLICTS_overlayfs-etc = "${@ 'package-management' if bb.utils.to_boolean(d.getVar('OVERLAYFS_ETC_USE_ORIG_INIT_NAME'), True) else ''}"
OVERLAYFS_ETC_MOUNT_POINT ??= ""
OVERLAYFS_ETC_FSTYPE ??= ""
OVERLAYFS_ETC_DEVICE ??= ""
OVERLAYFS_ETC_USE_ORIG_INIT_NAME ??= "1"
OVERLAYFS_ETC_MOUNT_OPTIONS ??= "defaults"
OVERLAYFS_ETC_INIT_TEMPLATE ??= "${COREBASE}/meta/files/overlayfs-etc-preinit.sh.in"
python create_overlayfs_etc_preinit() {
overlayEtcMountPoint = d.getVar("OVERLAYFS_ETC_MOUNT_POINT")
overlayEtcFsType = d.getVar("OVERLAYFS_ETC_FSTYPE")
overlayEtcDevice = d.getVar("OVERLAYFS_ETC_DEVICE")
if not overlayEtcMountPoint:
bb.fatal("OVERLAYFS_ETC_MOUNT_POINT must be set in your MACHINE configuration")
if not overlayEtcDevice:
bb.fatal("OVERLAYFS_ETC_DEVICE must be set in your MACHINE configuration")
if not overlayEtcFsType:
bb.fatal("OVERLAYFS_ETC_FSTYPE should contain a valid file system type on {0}".format(overlayEtcDevice))
with open(d.getVar("OVERLAYFS_ETC_INIT_TEMPLATE"), "r") as f:
PreinitTemplate = f.read()
useOrigInit = oe.types.boolean(d.getVar('OVERLAYFS_ETC_USE_ORIG_INIT_NAME'))
preinitPath = oe.path.join(d.getVar("IMAGE_ROOTFS"), d.getVar("base_sbindir"), "preinit")
initBaseName = oe.path.join(d.getVar("base_sbindir"), "init")
origInitNameSuffix = ".orig"
args = {
'OVERLAYFS_ETC_MOUNT_POINT': overlayEtcMountPoint,
'OVERLAYFS_ETC_MOUNT_OPTIONS': d.getVar('OVERLAYFS_ETC_MOUNT_OPTIONS'),
'OVERLAYFS_ETC_FSTYPE': overlayEtcFsType,
'OVERLAYFS_ETC_DEVICE': overlayEtcDevice,
'SBIN_INIT_NAME': initBaseName + origInitNameSuffix if useOrigInit else initBaseName
}
if useOrigInit:
# rename original /sbin/init
origInit = oe.path.join(d.getVar("IMAGE_ROOTFS"), initBaseName)
bb.debug(1, "rootfs path %s, init path %s, test %s" % (d.getVar('IMAGE_ROOTFS'), origInit, d.getVar("IMAGE_ROOTFS")))
bb.utils.rename(origInit, origInit + origInitNameSuffix)
preinitPath = origInit
with open(preinitPath, 'w') as f:
f.write(PreinitTemplate.format(**args))
os.chmod(preinitPath, 0o755)
}
|
