The true cause of the missing UFS/MSDOSFS labels has been
identified, and only affects stable/10 at the moment.
An request for commit to stable/10 will be pending RE approval
after this commit.
MFC after: 1 day
X-MFC-Note: never
X-MFC-Never: r285018, r285019, r285076, r285078, r285082
Sponsored by: The FreeBSD Foundation
the symlink from loader.rc.sample.
Fix paths relative to the CHROOTDIR.
MFC after: 3 days
X-MFC-With: r285076, r285078
X-MFC-Before: 10.2-BETA1
Sponsored by: The FreeBSD Foundation
UFS/MSDOSFS label issues on FreeBSD/arm builds, however
the real problem was addressed in r285076, which is due
to two separate issues, unrelated to md(4) stale device
existence.
MFC after: 3 days
X-MFC-With: r285076
X-MFC-Before: 10.2-BETA1
Sponsored by: The FreeBSD Foundation
FreeBSD/arm builds. The problem stems from the loader.rc file
not existing, as well as geom_label not being loaded at boot.
For now, add the geom_label_load entry to loader.conf, and
symlink loader.rc.sample to loader.rc, both of which allowed
my BeagleBone Black to boot fine with a UFS label reference in
fstab(5).
MFC after: 3 days
X-MFC-Before: 10.2-BETA1
Sponsored by: The FreeBSD Foundation
cannot possibly exist within the chroot(8) before the target
filesystem actually exists.
MFC after: 3 days
X-MFC-With: r285018
Sponsored by: The FreeBSD Foundation
written to disk with newfs(8) and newfs_msdosfs(8).
When iterating through snapshot builds in serial, it is possible for
a build failure to leave stale md(4) devices behind, in some cases, they
could have a UFS or MSDOS filesystem label assigned.
If the md(4) is not destroyed (or not able to be destroyed, as has
happened recently due to my own fault), the filesystem label that
already exists can interfere with a new md(4) device that is targeted to
have the same label.
This behavior, although admittedly a logic error in the wrapper build
scripts, has caused intermittent reports (in particular with the armv6
builds) of missing UFS/MSDOSFS labels, causing the image to fallback to
the mountroot prompt. This appears to only happen when the backing
md(4) device is destroyed before the calling umount(8) on the target
mount, after which the UFS/MSDOSFS label persists.
The workaround is this: If EVERYTHINGISFINE is set to non-empty value,
check for an existing ufs/rootfs and msdosfs/MSDOSBOOT filesystem label
in arm_create_disk(), and rm(1) them if they exist.
The EVERYTHINGISFINE variable is chosen because it is used in exactly
one other place - release/Makefile.mirrors - and there are big scary
warnings at the top of that file as well that it should *not* be used
under normal circumstances. This should not destroy a build machine
that also uses '/dev/ufs/rootfs' as the UFS label, and I have verified
in extensive local testing that the destroyed label is recreated when
the md(4) is unmounted/mounted, but this really should not be enabled
by anyone.
Having said all that, I absolutely *do* plan MFC this to stable/10 for
the 10.2-RELEASE cycle, as so far, I have only observed this behavior
on stable/10, but this is a temporary solution until I can unravel all
of the failure paths to properly trap them.
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
It was useful when working out several kinks when
testing automated image uploading when retrying was
necessary, but now it is making things much too messy.
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
