From: Chen Qi <qi.c...@windriver.com> The series of patches add support to read-only rootfs.
The main idea is to use symbolic links to create the illuion that some directories are writable in case of a read-only rootfs. We use a similar stragety to update-rc.d.bbclass to manage all the recipes that need to tweak some specific directories to support a read-only rootfs. These recipes inherit volatiles.bbclass and set VOLATILE_DIR, VOLATILE_LINK and VOLATILE_PKGS properly. The advantage of this strategy is that it deligates the task of supporting read-only rootfs to the recipes, resulting in a better management scheme. This set of patches have been tested on minimal images with and without 'read-only-rootfs' image feature enabled. Everything is OK. For sato images, everything is the same as before if 'read-only-rootfs' is not enabled. With 'read-only-rootfs' enabled, sato image could work if graphic interface is diabled. When all postinstall problems are resolved, sato image should work well. The following changes since commit 37e025f6f9c410005e0f1dee0767e38eaec01cbd: bitbake: hob: Hob should display warnings generated during parsing (2013-01-21 19:05:31 +0000) are available in the git repository at: git://git.pokylinux.org/poky-contrib ChenQi/readonly-rootfs http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=ChenQi/readonly-rootfs Chen Qi (12): sysvinit: add ROOTFS_READ_ONLY variable to rcS-default image.bbclass: add a hook funtion to support readonly rootfs core-image.bbclass: support read-only rootfs package.bbclass: add VOLATILE_DIR and VOLATILE_LINK to PACKAGEVARS volatiles.bbclass: add recipe volatiles_sysvinit.bbclass: add recipe populate-volatile.sh: improve this script initscripts: let populate-volatile.sh create the /tmp link initscripts: inherit volatiles to support read-only rootfs dropbear: inherit volatiles to support read-only rootfs nfs-utils: inherit volatiles to support read-only rootfs dbus: inherit volatiles to support read-only rootfs meta/classes/core-image.bbclass | 4 + meta/classes/image.bbclass | 18 ++ meta/classes/package.bbclass | 4 +- meta/classes/volatiles.bbclass | 11 + meta/classes/volatiles_sysvinit.bbclass | 49 ++++ .../nfs-utils/nfs-utils_1.2.3.bb | 7 +- meta/recipes-core/dbus/dbus.inc | 7 +- meta/recipes-core/dropbear/dropbear.inc | 7 +- .../initscripts/initscripts-1.0/bootmisc.sh | 9 +- .../initscripts-1.0/populate-volatile.sh | 287 ++++++++++---------- .../initscripts/initscripts-1.0/volatiles | 1 + meta/recipes-core/initscripts/initscripts_1.0.bb | 6 +- meta/recipes-core/sysvinit/sysvinit/rcS-default | 4 + meta/recipes-core/sysvinit/sysvinit_2.88dsf.bb | 2 +- 14 files changed, 255 insertions(+), 161 deletions(-) create mode 100644 meta/classes/volatiles.bbclass create mode 100644 meta/classes/volatiles_sysvinit.bbclass -- 1.7.9.5 _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
