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author | Vyacheslav Yurkov <v.yurkov@precitec.de> | 2022-09-07 21:51:36 +0200 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2022-09-09 12:24:43 +0100 |
commit | e38ef4dcf13f365d018f44fc0216ff596ee94681 (patch) | |
tree | bbc46941f29f42320f723418ca2e80d847bc7655 /meta/classes-recipe/overlayfs-etc.bbclass | |
parent | 9277742901e4e63794dc74bb70815518fc1c8c16 (diff) | |
download | poky-e38ef4dcf13f365d018f44fc0216ff596ee94681.tar.gz |
classes: Update overlayfs classes to use new bitbake functionality
OverlayFS classes belong to a recipe scope
(From OE-Core rev: 7afa7739e82220729566ccabe2675a8991f9485a)
Signed-off-by: Vyacheslav Yurkov <v.yurkov@precitec.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/classes-recipe/overlayfs-etc.bbclass')
-rw-r--r-- | meta/classes-recipe/overlayfs-etc.bbclass | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/meta/classes-recipe/overlayfs-etc.bbclass b/meta/classes-recipe/overlayfs-etc.bbclass new file mode 100644 index 0000000000..d0bc3ecfac --- /dev/null +++ b/meta/classes-recipe/overlayfs-etc.bbclass | |||
@@ -0,0 +1,82 @@ | |||
1 | # | ||
2 | # Copyright OpenEmbedded Contributors | ||
3 | # | ||
4 | # SPDX-License-Identifier: MIT | ||
5 | # | ||
6 | |||
7 | # Class for setting up /etc in overlayfs | ||
8 | # | ||
9 | # In order to have /etc directory in overlayfs a special handling at early boot stage is required | ||
10 | # The idea is to supply a custom init script that mounts /etc before launching actual init program, | ||
11 | # because the latter already requires /etc to be mounted | ||
12 | # | ||
13 | # The configuration must be machine specific. You should at least set these three variables: | ||
14 | # OVERLAYFS_ETC_MOUNT_POINT ?= "/data" | ||
15 | # OVERLAYFS_ETC_FSTYPE ?= "ext4" | ||
16 | # OVERLAYFS_ETC_DEVICE ?= "/dev/mmcblk0p2" | ||
17 | # | ||
18 | # To control more mount options you should consider setting mount options: | ||
19 | # OVERLAYFS_ETC_MOUNT_OPTIONS ?= "defaults" | ||
20 | # | ||
21 | # The class provides two options for /sbin/init generation | ||
22 | # 1. Default option is to rename original /sbin/init to /sbin/init.orig and place generated init under | ||
23 | # original name, i.e. /sbin/init. It has an advantage that you won't need to change any kernel | ||
24 | # parameters in order to make it work, but it poses a restriction that package-management can't | ||
25 | # be used, becaause updating init manager would remove generated script | ||
26 | # 2. If you are would like to keep original init as is, you can set | ||
27 | # OVERLAYFS_ETC_USE_ORIG_INIT_NAME = "0" | ||
28 | # Then generated init will be named /sbin/preinit and you would need to extend you kernel parameters | ||
29 | # manually in your bootloader configuration. | ||
30 | # | ||
31 | # Regardless which mode you choose, update and migration strategy of configuration files under /etc | ||
32 | # overlay is out of scope of this class | ||
33 | |||
34 | ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "overlayfs-etc", "create_overlayfs_etc_preinit;", "", d)}' | ||
35 | IMAGE_FEATURES_CONFLICTS_overlayfs-etc = "${@ 'package-management' if bb.utils.to_boolean(d.getVar('OVERLAYFS_ETC_USE_ORIG_INIT_NAME'), True) else ''}" | ||
36 | |||
37 | OVERLAYFS_ETC_MOUNT_POINT ??= "" | ||
38 | OVERLAYFS_ETC_FSTYPE ??= "" | ||
39 | OVERLAYFS_ETC_DEVICE ??= "" | ||
40 | OVERLAYFS_ETC_USE_ORIG_INIT_NAME ??= "1" | ||
41 | OVERLAYFS_ETC_MOUNT_OPTIONS ??= "defaults" | ||
42 | OVERLAYFS_ETC_INIT_TEMPLATE ??= "${COREBASE}/meta/files/overlayfs-etc-preinit.sh.in" | ||
43 | |||
44 | python create_overlayfs_etc_preinit() { | ||
45 | overlayEtcMountPoint = d.getVar("OVERLAYFS_ETC_MOUNT_POINT") | ||
46 | overlayEtcFsType = d.getVar("OVERLAYFS_ETC_FSTYPE") | ||
47 | overlayEtcDevice = d.getVar("OVERLAYFS_ETC_DEVICE") | ||
48 | |||
49 | if not overlayEtcMountPoint: | ||
50 | bb.fatal("OVERLAYFS_ETC_MOUNT_POINT must be set in your MACHINE configuration") | ||
51 | if not overlayEtcDevice: | ||
52 | bb.fatal("OVERLAYFS_ETC_DEVICE must be set in your MACHINE configuration") | ||
53 | if not overlayEtcFsType: | ||
54 | bb.fatal("OVERLAYFS_ETC_FSTYPE should contain a valid file system type on {0}".format(overlayEtcDevice)) | ||
55 | |||
56 | with open(d.getVar("OVERLAYFS_ETC_INIT_TEMPLATE"), "r") as f: | ||
57 | PreinitTemplate = f.read() | ||
58 | |||
59 | useOrigInit = oe.types.boolean(d.getVar('OVERLAYFS_ETC_USE_ORIG_INIT_NAME')) | ||
60 | preinitPath = oe.path.join(d.getVar("IMAGE_ROOTFS"), d.getVar("base_sbindir"), "preinit") | ||
61 | initBaseName = oe.path.join(d.getVar("base_sbindir"), "init") | ||
62 | origInitNameSuffix = ".orig" | ||
63 | |||
64 | args = { | ||
65 | 'OVERLAYFS_ETC_MOUNT_POINT': overlayEtcMountPoint, | ||
66 | 'OVERLAYFS_ETC_MOUNT_OPTIONS': d.getVar('OVERLAYFS_ETC_MOUNT_OPTIONS'), | ||
67 | 'OVERLAYFS_ETC_FSTYPE': overlayEtcFsType, | ||
68 | 'OVERLAYFS_ETC_DEVICE': overlayEtcDevice, | ||
69 | 'SBIN_INIT_NAME': initBaseName + origInitNameSuffix if useOrigInit else initBaseName | ||
70 | } | ||
71 | |||
72 | if useOrigInit: | ||
73 | # rename original /sbin/init | ||
74 | origInit = oe.path.join(d.getVar("IMAGE_ROOTFS"), initBaseName) | ||
75 | bb.debug(1, "rootfs path %s, init path %s, test %s" % (d.getVar('IMAGE_ROOTFS'), origInit, d.getVar("IMAGE_ROOTFS"))) | ||
76 | bb.utils.rename(origInit, origInit + origInitNameSuffix) | ||
77 | preinitPath = origInit | ||
78 | |||
79 | with open(preinitPath, 'w') as f: | ||
80 | f.write(PreinitTemplate.format(**args)) | ||
81 | os.chmod(preinitPath, 0o755) | ||
82 | } | ||