sharing a partition betweed FC3 and FC5
- From: "D. Hugh Redelmeier" <hugh@xxxxxxxxxx>
- Date: Sun, 6 Aug 2006 01:30:42 -0400 (EDT)
I installed 32-bit Fedora Core 5 on an Athlon-64 box. I intended this
installation to co-exist with a 64-bit Fedora Core 3 installation.
The two installations share a /home ext3 partition and the swap partition.
This is often how I do upgrades: a dual boot system with both old and
new bootable.
The problem is that the FC5 installation did something to
the /home partition that prevents the FC3 from mounting it.
When I manually try a mount of /home from FC3, the useless
mount-failure message is preceded by these messages. I think that
they are the key:
inode_doinit_with_dentry: context_to_sid(system_u:object_r:home_root_t:s0) returned 22 for dev=hda5 ino=2
inode_doinit_with_dentry: context_to_sid(system_u:object_r:home_root_t:s0) returned 22 for dev=hda5 ino=2
(In dmesg, these two messages were preceded by these that might be relevant:
kjournald starting. Commit interval 5 seconds
EXT3 FS on hda5, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
SELinux: initialized (dev hda5, type ext3), uses xattr
)
(The useless mount failure message is:
mount: wrong fs type, bad option, bad superblock on /dev/hda5
or too many mounted file systems
This message is disgracefully non-specific.)
I think that this is a problem with SELinux. The following thread
looks relevant but unhelpful:
http://www.redhat.com/archives/fedora-selinux-list/2006-April/msg00002.html
It provides a solution (I hope) for FC4 but FC3 would not have such an update.
I tried using enforcing=0 on the FC3 kernel command line, but nothing changed.
I thought ext3 was compatible between Fedora releases. Unfortunately,
SELinux seems to have made things a lot more brittle.
==> Is there something simple that I can do to allow the existing
/home ext3 partition to be shared between FC3 and FC5?
==> What does the error message mean?
inode 2 is the root of the filesystem.
It appears that kernel routine inode_doinit_with_dentry is calling context_to_sid
and context_to_sid is returning EINVAL (because the context was invalid).
But even knowing that, I don't know what it actually means or is caused by.
(By the way, if FC5 worked well, it might not matter. Unfortunately,
there is some regression in xorg that prevents dual-head working
properly on FC5 where it did on FC3.)
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