On 25/06/12 13:12, Denis Cardon wrote:
Hi Rowland,
Well, after a bit of thought and downloading the kernel source from
Ubuntu, I am answering my own question.
I came across the same issue last week. Actually the newest kernel
(wheezy/ ubuntu 12.04), the /proc/mounts does not show options that
are setup by default in tune2fs (see the "Default mount options" below)
[root@debian ~]# tune2fs -l /dev/xvda1
tune2fs 1.42.2 (9-Apr-2012)
Filesystem volume name: <none>
Last mounted on: /
Filesystem UUID: 571f5042-f210-45a1-9385-e5caf2f86e8b
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index
filetype needs_recovery extent flex_bg sparse_super large_file
huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
If you want to have the acl flag displayed in /proc/mounts (and
/etc/mtab which now finally symlinks to /proc/mounts), you have to
remove the "Default mount options" with the command below and add the
acl option in /etc/fstab :
tune2fs -o ^acl /dev/xvda1
Cheers,
Denis
This is from the source file for the kernel that Ubuntu 12.04 uses
(3.2.0-25)
It comes from "Documentation/filesystems/ext4.txt"
nouser_xattr Disables Extended User Attributes. If you have extended
attribute support enabled in the kernel configuration
(CONFIG_EXT4_FS_XATTR), extended attribute support
is enabled by default on mount. See the attr(5) manual
page and http://acl.bestbits.at/ for more information
about extended attributes.
noacl This option disables POSIX Access Control List
support. If ACL support is enabled in the kernel
configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL is
enabled by default on mount. See the acl(5) manual
page and http://acl.bestbits.at/ for more information
about acl.
If I run:
cat /boot/config-3.2.0-25-generic | grep CONFIG_EXT4
I get:
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_XATTR=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
# CONFIG_EXT4_DEBUG is not set
I would suggest that, as I thought, you do not have to add anything to
/etc/fstab to get acl's, in fact you have to add something to turn them
off.
Rowland
I always wondered how you found out what the defaults mount options
were, could never find out via google, probably never asked just the
right question ;-)
But now I know, thanks Denis.
Anyway, this just confirms what I said, on Ubuntu 12.04 you do not have
to touch /etc/fstab to compile and install Samba4.
Rowland
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