Release Note for aufs2-base3-2.6.27
J. R. Okajima
Feb 2 2009
This version of AUFS has several purposes.
- to be reviewed easily and widely.
- to make the source files simpler and smaller by dropping several
original features.
Through this work, I may find some bad things in original source code
and have a chance to fix them. Some of the dropped features will be
reverted in the future, but not all I'm afraid.
If you are using AUFS currently and don't need the dropped features,
then I'd recommend you to use this version.
To Use This Version
- plain linux-2.6.27
- apply all patches.
- make menuconfig, and enable CONFIG_AUFS_FS
- build your kernel, install and reboot.
- build aufs2-util and install.
+ make variable: KDIR
specify your kernel source path
+ make variable: DESTDIR
specify your install path.
some commands have to be installed under /sbin.
- almost all information about the CVS version are still valid,
except the dropped features and below.
If you find something wrong, please let me know (or aufs-users ML). It
will be surely drive me ahead and really appriciated.
########################################
Changes from aufs2-base2
- stop parsing colon ':' for some options.
- rename .wh..wh.tmp dir to .wh..wh.orph.
- change the order of mount options in /proc/mounts.
- refine the inode attribute and the getattr operation.
- enhance the truncate operation.
- revert the old approach to support FMODE_EXEC and deny_write_access()
which prohibits the write-acces to the executing binary.
- reallocate memory at del-branch.
- several internal enhancements and bugfixes
Changes from aufs2-base1
- NFS branch support (except atomic-open in NFSv4)
- aufs-util (with new ioctl)
- the module parameter 'brs' set to 1 by default.
- several internal enhancements
Dropped features from the CVS version (aufs1)
- NFS branch
- NFS exporting
- detecting user's direct access to branch (udba=inotify)
- test only the highest one for the directory permission (dirperm1)
- show whiteout mode (shwh)
- copyup on open (coo=)
- being another aufs's readonly branch (robr)
- statistics of aufs thread (/sys/fs/aufs/stat)
- delegation mode (dlgt)
- intent.open/create (file open in a single lookup)
- etc...
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