> On Mon, Mar 23, 2015 at 5:28 PM, Randy Witt > <[email protected]> wrote: >> If /var/volatile is a mount point it shouldn't contain any files before >> mount time. If files are there, they will no longer be able to be >> accessed >> once the tmpfs gets mounted at /var/volatile. > > why not use copy-bind when mounting it second time as tmpfs ? >
Khem, could you elaborate? I'm not sure I know the mechanism to which you are referring. >> >> This problem can be seen for instance when systemd creates >> /var/volatile/log/journal as part of its package installation. It then >> assumes the journal is persistent even though /var/volatile/log/journal >> goes away shortly thereafter. >> >> This change makes sure that there are no files in /var/volatile if it is >> to be used as a mount point. >> >> [Yocto #7388] >> >> Signed-off-by: Randy Witt <[email protected]> >> --- >> meta/classes/image.bbclass | 16 ++++++++++++++++ >> 1 file changed, 16 insertions(+) >> >> diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass >> index 89eb5f3..dfedf9d 100644 >> --- a/meta/classes/image.bbclass >> +++ b/meta/classes/image.bbclass >> @@ -181,6 +181,8 @@ POSTINST_LOGFILE ?= >> "${localstatedir}/log/postinstall.log" >> SYSTEMD_DEFAULT_TARGET ?= '${@bb.utils.contains("IMAGE_FEATURES", >> "x11-base", "graphical.target", "multi-user.target", d)}' >> ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("DISTRO_FEATURES", >> "systemd", "set_systemd_default_target; ", "", d)}' >> >> +ROOTFS_POSTPROCESS_COMMAND += 'empty_var_volatile;' >> + >> # some default locales >> IMAGE_LINGUAS ?= "de-de fr-fr en-gb" >> >> @@ -377,6 +379,20 @@ set_systemd_default_target () { >> fi >> } >> >> +# If /var/volatile is not empty, we have seen problems where programs >> such as the >> +# journal make assumptions based on the contents of /var/volatile. The >> journal >> +# would then write to /var/volatile before it was mounted, thus hiding >> the >> +# items previously written. >> +# >> +# This change is to attempt to fix those types of issues in a way that >> doesn't >> +# affect users that may not be using /var/volatile. >> +empty_var_volatile () { >> + match=`awk '$1 !~ "#" && $2 ~ /\/var\/volatile/{print $2}' >> ${IMAGE_ROOTFS}/etc/fstab 2> /dev/null` >> + if [ -n "$match" ]; then >> + find ${IMAGE_ROOTFS}/var/volatile -mindepth 1 -delete >> + fi >> +} >> + >> # Turn any symbolic /sbin/init link into a file >> remove_init_link () { >> if [ -h ${IMAGE_ROOTFS}/sbin/init ]; then >> -- >> 1.9.3 >> >> -- >> _______________________________________________ >> Openembedded-core mailing list >> [email protected] >> http://lists.openembedded.org/mailman/listinfo/openembedded-core > -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
