Re: [PATCH 1/2] E2fsprogs: use the generic inode flags

[liubo <liubo2009@cn.fujitsu.com>]

On 04/18/2011 04:41 PM, Coly Li wrote:
> On 2011=E5=B9=B404=E6=9C=8818=E6=97=A5 15:37, liubo Wrote:
>> Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
>> ---
>>  debugfs/htree.c        |    2 +-
>>  e2fsck/pass1.c         |   22 +++++++++++-----------
>>  e2fsck/pass2.c         |    2 +-
>>  e2fsck/pass4.c         |    2 +-
>>  e2fsck/rehash.c        |    4 ++--
>>  ext2ed/inode_com.c     |   14 +++++++-------
>>  lib/e2p/fgetflags.c    |    6 +++---
>>  lib/e2p/fsetflags.c    |    6 +++---
>>  lib/e2p/getflags.c     |    6 +++---
>>  lib/e2p/pf.c           |   34 +++++++++++++++++-----------------
>>  lib/e2p/setflags.c     |    6 +++---
>>  lib/ext2fs/ext2_fs.h   |   44 ++++++++++++++++++++++---------------=
-------
>>  lib/ext2fs/link.c      |    4 ++--
>>  lib/ext2fs/mkjournal.c |    2 +-
>>  misc/chattr.c          |   26 +++++++++++++-------------
>>  misc/tune2fs.c         |    2 +-
>>  16 files changed, 91 insertions(+), 91 deletions(-)
>> [snip]
>=20
> Hi Bo,
>=20
> Could you please to introduce the motivation of this patch set a litt=
le bit more? Thanks.
>=20

Hi Li,

Since we want to control COW and compression attribute on a per file or=
 per directory basis,
and find that the generic command "chattr" is the "Mr Right".

Currently only btrfs supports both, of course.

With these patches, we can do the followings:

c: compress
C: nocow

set compress & nocow:

# ./misc/chattr -V +c +C /mnt/btrfs/dir/
chattr 1.41.14 (22-Dec-2010)
=46lags of /mnt/btrfs/dir/ set as --------c------C

# ./misc/lsattr -d /mnt/btrfs/dir/
--------c------C /mnt/btrfs/dir/

thanks,
liubo
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