Package: util-linux
Version: 2.29.2-1
Severity: normal
Dear Maintainer,
i just upgraded & dist-upgraded from raspbian jessie to raspbian stretch
successfully.
but now i have an issue mounting multiple partitions of a disk image. the first
is mounted well as usual.
(that issue was not present on debian jessie)
the mount option in /etc/fstab:
/x/2017-06-21-raspbian-jessie-lite.img /media/boot auto
loop,ro,nofail,auto,offset=4194304 0 0
/x/2017-06-21-raspbian-jessie-lite.img /media/root auto
loop,ro,nofail,auto,offset=48234496 0 0
the folders /media/boot and /media/root do exist.
when i try to mount all with mount -a, i get the folowing error message:
$ sudo mount -a
mount: /x/2017-06-21-raspbian-jessie-lite.img: overlapping loop device exists
in the man pages og mount i found that note:
$ man mount
...
THE LOOP DEVICE
...
Since util-linux v2.29 mount command re-uses the loop device rather
than initialize a new device if the same backing file is already used for some
loop device with the same
offset and sizelimit. This is necessary to avoid a filesystem corruption.
...
but this will not explain the error message, because i am using different
offests.
the situation after the issue is:
only the first partition is mounted properly
$ sudo mount
/x/2017-06-21-raspbian-jessie-lite.img on /media/boot type vfat (ro,relatime...)
$ sudo losetup -a
/dev/loop0: []: (/x/2017-06-21-raspbian-jessie-lite.img), offset 4194304
when i change the mount options in the /etc/fstab, to use a specific loop
device per mount entry, i still run into that issue:
/x/2017-06-21-raspbian-jessie-lite.img /media/boot auto
loop=/dev/loop1,ro,nofail,auto,offset=4194304 0 0
/x/2017-06-21-raspbian-jessie-lite.img /media/root auto
loop=/dev/loop2,ro,nofail,auto,offset=48234496 0 0
but when i do the same step by step (attaching a loop and mounting the loop) by
hand, it works:
$ sudo losetup --offset 4194304 /dev/loo1 /x/2017-06-21-raspbian-jessie-lite.img
$ sudo mount /dev/loop1 /media/boot -o ro
$ sudo losetup --offset 48234496 /dev/loop2
/x/2017-06-21-raspbian-jessie-lite.img
$ sudo mount /dev/loop2 /media/root -o ro
then the situation is as:
$ sudo losetup -a
/dev/loop1: [45826]:260076 (/x/2017-06-21-raspbian-jessie-lite.img), offset
4194304
/dev/loop2: [45826]:260076 (/x/2017-06-21-raspbian-jessie-lite.img), offset
48234496
$ sudo mount
/dev/loop1 on /media/boot type vfat (ro,relatime...)
/dev/loop2 on /media/root type vfat (ro,relatime...)
so the big question is, how can i mount the two partitions of the same disk
image at the same time with using /etc/fstab and mount -a?
this is an issue on Debian Stretch and Raspbian Stretch.
it was not an issue on Debian Jessie and Raspbian Jessie.
-- System Information:
Debian Release: 9.1
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE, LC_CTYPE=de_DE (charmap=ISO-8859-1), LANGUAGE=de_DE
(charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages util-linux depends on:
ii libblkid1 2.29.2-1
ii libc6 2.24-11+deb9u1
ii libfdisk1 2.29.2-1
ii libmount1 2.29.2-1
ii libncursesw5 6.0+20161126-1
ii libpam0g 1.1.8-3.6
ii libselinux1 2.6-3+b1
ii libsmartcols1 2.29.2-1
ii libsystemd0 232-25+deb9u1
ii libtinfo5 6.0+20161126-1
ii libudev1 232-25+deb9u1
ii libuuid1 2.29.2-1
ii zlib1g 1:1.2.8.dfsg-5
util-linux recommends no packages.
Versions of packages util-linux suggests:
ii dosfstools 4.1-1
ii kbd 2.0.3-2+b1
ii util-linux-locales 2.29.2-1
-- no debconf information
