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Description of problem:
mount --move doesn't work
Version-Release number of selected component (if applicable):
util-linux-2.22.1-2.4.el7.x86_64
Linux pes-guest-92.lab.eng.brq.redhat.com 3.7.0-0.32.el7.x86_64 #1 SMP Fri Jan 18 11:50:31 EST 2013 x86_64 x86_64 x86_64 GNU/Linux
How reproducible:
always
Steps to Reproduce:
1. mount xyz:/mnt/qa on /mnt/qa
2. mkdir /tmp/1234
3. mount --move /mnt/qa /tmp/1234
Actual results:
# mount -M /mnt/qa /tmp/tmp.fIC9T6y9lw
mount: wrong fs type, bad option, bad superblock on /mnt/qa,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
Expected results:
mount is moved
Additional info:
Are you really sure that the used parents (mountpoints) are private? The current default in RHEL7 (not sure about RHEL6) is "shared", see /proc/self/mountinfo for the shared flag.
Linux kernel does not allow to move between shared targets.
Fedora 18:
# mount --bind /mnt/test /mnt/test
# mount --make-private /mnt/test
# mkdir /mnt/test/{foo,bar}
# mount /dev/sdb /mnt/test/foo
# findmnt /dev/sdb
TARGET SOURCE FSTYPE OPTIONS
/mnt/test/foo /dev/sdb ext2 rw,relatime,stripe=32
# mount --move /mnt/test/foo /mnt/test/bar
# findmnt /dev/sdb
TARGET SOURCE FSTYPE OPTIONS
/mnt/test/bar /dev/sdb ext2 rw,relatime,stripe=32
Fixed by upstream commit fcc0413a12efde3f413064a622ea0a0595ede49f (util-linux >= 2.23-rc2).
# mount --move /a /b
mount: bad option. Note that moving a mount residing under a shared
mount is unsupported.
This request was resolved in Red Hat Enterprise Linux 7.0.
Contact your manager or support representative in case you have further questions about the request.
Description of problem: mount --move doesn't work Version-Release number of selected component (if applicable): util-linux-2.22.1-2.4.el7.x86_64 Linux pes-guest-92.lab.eng.brq.redhat.com 3.7.0-0.32.el7.x86_64 #1 SMP Fri Jan 18 11:50:31 EST 2013 x86_64 x86_64 x86_64 GNU/Linux How reproducible: always Steps to Reproduce: 1. mount xyz:/mnt/qa on /mnt/qa 2. mkdir /tmp/1234 3. mount --move /mnt/qa /tmp/1234 Actual results: # mount -M /mnt/qa /tmp/tmp.fIC9T6y9lw mount: wrong fs type, bad option, bad superblock on /mnt/qa, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Expected results: mount is moved Additional info: